If you're looking for easy text alignment, you need to use the imagettfbbox() command. When given the correct parameters, it will return the boundaries of your to-be-made text field in an array, which will allow you to calculate the x and y coordinate that you need to use for centering or aligning your text.
A horizontal centering example:
<?php
$tb = imagettfbbox(17, 0, 'airlock.ttf', 'Hello world!');
?>
$tb would contain:
Array
(
[0] => 0 // lower left X coordinate
[1] => -1 // lower left Y coordinate
[2] => 198 // lower right X coordinate
[3] => -1 // lower right Y coordinate
[4] => 198 // upper right X coordinate
[5] => -20 // upper right Y coordinate
[6] => 0 // upper left X coordinate
[7] => -20 // upper left Y coordinate
)
For horizontal alignment, we need to substract the "text box's" width { $tb[2] or $tb[4] } from the image's width and then substract by two.
Saying you have a 200px wide image, you could do something like this:
<?php
$x = ceil((200 - $tb[2]) / 2); // lower left X coordinate for text
imagettftext($im, 17, 0, $x, $y, $tc, 'airlock.ttf', 'Hello world!'); // write text to image
?>
This'll give you perfect horizontal center alignment for your text, give or take 1 pixel. Have fun!imagettftext
(PHP 4, PHP 5, PHP 7, PHP 8)
imagettftext — Escreve texto na imagem usando fontes TrueType
Descrição
imagettftext(
GdImage
float
float
int
int
int
string
string
array
): array|false
GdImage
$image,float
$size,float
$angle,int
$x,int
$y,int
$color,string
$font_filename,string
$text,array
$options = []): array|false
Escreve o texto definido em text na imagem, usando fontes
TrueType.
Nota:
Antes do PHP 8.0.0, imagefttext() era uma variante estendida de imagettftext() que adicionalmente suportava o parâmetro
extrainfo. A partir do PHP 8.0.0, imagettftext() é um apelido de imagefttext().
Parâmetros
-
image Um objeto GdImage, retornado por uma das funções de criação de imagem, como imagecreatetruecolor().
size-
O tamanho da fonte em pontos.
angle-
O ângulo em graus, com 0 grau sendo um texto lido da esquerda para a direita. Valores mais altos representam uma rotação no sentido anti-horário. Por exemplo, um valor de 90 resultaria em um texto lido de baixo para cima.
x-
A coordenada fornecida por
xeydefinirá o ponto base do primeiro caractere (aproximadamente o canto inferior esquerdo do caractere). Isto é diferente de imagestring(), ondexeydefinem o canto superior esquerdo do primeiro caractere. Por exemplo, "superior esquerdo" é 0, 0. y-
A ordenada y. Define a posição da linha base das fontes, e não a parte mais baixa do caractere.
color-
O índica de cor. Usar o valor negativo de um índice de cor tem o efeito de desligar a redução de serrilhado. Consulte imagecolorallocate().
fontfile-
O caminho para a fonte TrueType que será usada.
Dependendo de qual versão da biblioteca GD o PHP estiver usando, quando
fontfilenão começar com uma/então.ttfserá adicionado ao nome do arquivo e a biblioteca tentará procurá-lo em um caminho de fontes definido pela biblioteca.Ao usar versões da biblioteca GD anteriores à versão 2.0.18, um caractere
espaço, em vez de um ponto-e-vírgula, foi usado como 'separador de caminho' para diferentes arquivos de fonte. O uso não intencional desse recurso resultará na mensagem de aviso:Warning: Could not find/open font. Para essas versões afetadas, a única solução é mover a fonte para um caminho que não contenha espaços.Em muitos casos em que uma fonte reside no mesmo diretório que o script que a usa, o truque a seguir aliviará qualquer problema de inclusão.
<?php
// Define a variável de ambiente GDFONTPATH
putenv('GDFONTPATH=' . realpath('.'));
// Define a fonte a ser usada (observe a ausência da extensão .ttf)
$font = 'SomeFont';
?>Nota:
Note que open_basedir não se aplica a
fontfile. text-
A string de texto em codificação UTF-8.
Pode incluir referências a caracteres numéricos decimais (na forma: €) para acessar caracteres em uma fonte além da posição 127. O formato hexadecimal (como ©) é suportado. Strings em codificação UTF-8 pode ser passado diretamente.
Entidades nomeadas, tal como ©, não são suportadas. Considere usar html_entity_decode() para decodificar estas entidades nomeadas em strings UTF-8.
Se um caractere usado na string não for suportado pela fonte, um retêngulo vazado substituirá o caractere.
Valor Retornado
Retorna um array com 8 elementos representando quatro pontos que formam
o retângulo limite do texto. A ordem dos pontos é inferior esquerdo, inferior
direito, superior direito, superior esquerdo. Os pontos são relativos ao texto
independente do ângulo, portanto "superior esquerdo" significa o canto superior
esquerdo quando o texto é visto na horizontal.
Retorna false em caso de erros.
Registro de Alterações
| Versão | Descrição |
|---|---|
| 8.0.0 |
O parâmetro options foi adicionado.
|
Exemplos
Exemplo #1 Exemplo de imagettftext()
Este script de exemplo produz um PNG branco de 400x30 pixels, com a palavra "Testing..." em preto (com sombra cinza), na fonte Arial.
<?php
// Define o tipo de conteúdo
header('Content-Type: image/png');
// Cria a imagem
$im = imagecreatetruecolor(400, 30);
// Cria algumas cores
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 399, 29, $white);
// O texto a ser desenhado
$text = 'Testing...';
// Substitui o caminho da fonte
$font = 'arial.ttf';
// Adiciona sombra ao texto
imagettftext($im, 20, 0, 11, 21, $grey, $font, $text);
// Adiciona o texto
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);
// Usar imagepng() resulta em um texto mais nítido comparado com imagejpeg()
imagepng($im);
imagedestroy($im);
?>O exemplo acima produzirá algo semelhante a:
Notas
Nota: Esta função só estará disponível se o PHP for compilado com suporte ao freetype (--with-freetype-dir=DIR).
Veja Também
- imagettfbbox() - Fornece a os limites retangulares de um texto usando fontes TrueType
- imagefttext() - Escreve texto em uma imagem usando fontes FreeType 2
Melhore Esta Página
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Notas Enviadas por Usuários (em inglês) 40 notes
Valentijn de Pagter ¶
16 years ago
gav-alex at bk dot ru ¶
19 years ago
Hi all!
When my hoster updated his php's libs at first minutes i've got the same problem as some of you.
Php couldn't find the path to true type fonts.
The solution in my case was to make the path look like this
<?php
imagettftext($im, 20, 0, 620, 260, $secondary_color, "./tahoma.ttf" , "NEWS");
?>
so as you can see i simply added "./"
another tip that i wanted to add here is how to write in RUssian on image using imagettftext
you simply have to change the function argument like this
<?php
imagettftext($im, 15, 0, 575, 300, $secondary_color, "./tahoma.ttf" , win2uni("some word in russian"));
?>
where win2uni is the function that converts win1251 to unicode. here is the code of it
<?php
// Windows 1251 -> Unicode
function win2uni($s)
{
$s = convert_cyr_string($s,'w','i'); // win1251 -> iso8859-5
// iso8859-5 -> unicode:
for ($result='', $i=0; $i<strlen($s); $i++) {
$charcode = ord($s[$i]);
$result .= ($charcode>175)?"&#".(1040+($charcode-176)).";":$s[$i];
}
return $result;
}
?>
That's all today! Thanks for your attention!
Alex
suyog at suyogdixit dot com ¶
11 years ago
For your general edification: The following drop-in function will place a block of fully justified text onto a GD image. It is a little CPU heavy, so I suggest caching the output rather than doing it on-the-fly.
Arguments:
$image - the GD handle of the target canvas
$size - text size
$angle - slope of text (does not work very well), leave at 0 for horizontal text
$left - no. of pixels from left to start block
$top - no. of pixels from top to start block
$color - handle for colour (imagecolorallocate result)
$font - path to .ttf font
$text - the text to wrap and justify
$max_width - the width of the text block within which the text should be wrapped and fully justified
$minspacing - the minimum number of pixels between words
$linespacing - a multiplier of line height (1 for normal spacing; 1.5 for line-and-a-half etc.)
eg.
$image = ImageCreateFromJPEG( "sample.jpg" );
$cor = imagecolorallocate($image, 0, 0, 0);
$font = 'arial.ttf';
$a = imagettftextjustified($image, 20, 0, 50, 50, $color, $font, "Shree", 500, $minspacing=3,$linespacing=1);
header('Content-type: image/jpeg');
imagejpeg($image,NULL,100);
function imagettftextjustified(&$image, $size, $angle, $left, $top, $color, $font, $text, $max_width, $minspacing=3,$linespacing=1)
{
$wordwidth = array();
$linewidth = array();
$linewordcount = array();
$largest_line_height = 0;
$lineno=0;
$words=explode(" ",$text);
$wln=0;
$linewidth[$lineno]=0;
$linewordcount[$lineno]=0;
foreach ($words as $word)
{
$dimensions = imagettfbbox($size, $angle, $font, $word);
$line_width = $dimensions[2] - $dimensions[0];
$line_height = $dimensions[1] - $dimensions[7];
if ($line_height>$largest_line_height) $largest_line_height=$line_height;
if (($linewidth[$lineno]+$line_width+$minspacing)>$max_width)
{
$lineno++;
$linewidth[$lineno]=0;
$linewordcount[$lineno]=0;
$wln=0;
}
$linewidth[$lineno]+=$line_width+$minspacing;
$wordwidth[$lineno][$wln]=$line_width;
$wordtext[$lineno][$wln]=$word;
$linewordcount[$lineno]++;
$wln++;
}
for ($ln=0;$ln<=$lineno;$ln++)
{
$slack=$max_width-$linewidth[$ln];
if (($linewordcount[$ln]>1)&&($ln!=$lineno)) $spacing=($slack/($linewordcount[$ln]-1));
else $spacing=$minspacing;
$x=0;
for ($w=0;$w<$linewordcount[$ln];$w++)
{
imagettftext($image, $size, $angle, $left + intval($x), $top + $largest_line_height + ($largest_line_height * $ln * $linespacing), $color, $font, $wordtext[$ln][$w]);
$x+=$wordwidth[$ln][$w]+$spacing+$minspacing;
}
}
return true;
}
mitch at electricpulp dot com ¶
17 years ago
If you're having issues with fonts not working... (Could not find/open font) check your permissions on the folder/font files and make sure they're 775, especially if you've just pulled them from a windows box. Hope this helps!
s.pynenburg _at_ gm ail dotcom ¶
16 years ago
I had an image generator where the user could position where they wanted the text to begin - however it kept going off the side of an image. So I made this basic function: it measures if the inputted text and x-position will cause the string to go off the edge, and if so, it will fit as much as it can on the first line, then go down to the next one.
Limitations:
-It only performs this once (i.e. it won't split into three lines)
-I'm pretty sure it won't work with angled text.
<?PHP
function imagettftextwrap($im, $size, $angle, $x_pos, $y_pos, $color, $font, $instr)
{
$box = @imagettfbbox($size, 0, $font, $instr);
$width = abs($box[4] - $box[0]);
$height = abs($box[3] - $box[5]);
$overlap = (($x_pos + $width) - imagesx($im));
if($overlap > 0) //if the text doesn't fit on the image
{
$chars = str_split($instr);
$str = "";
$pstr = "";
for($m=0; $m < sizeof($chars); $m++)
{
$bo = imagettfbbox($fsize1, 0, $font1, $str);
$wid = abs($bo[4] - $bo[0]);
if(($x_pos + $wid) < imagesx($im)) //add one char from the string as long as it's not overflowing
{
$pstr .= $chars[$m];
$bo2 = imagettfbbox($fsize1, 0, $font1, $pstr);
$wid2 = abs($bo2[4] - $bo2[0]);
if(($x_pos + $wid2) < imagesx($im))
{
$str .= $chars[$m];
}
else
{
break;
}
}
else
{
break;
}
}
$restof = "";
for($l=$m; $l < sizeof($chars); $l++)
{
$restof .= $chars[$l]; //add the rest of the string to a new line
}
imagettftext($im, $size, $angle, $x_pos, $y_pos, $color, $font, $str); // print out the smaller line
imagettftext($im, $size, $angle, 0, $y_pos + $height, $color, $font, $restof); //and the rest of it
}
else
{
imagettftext($im, $size, $angle, $x_pos, $y_pos, $color, $font, $instr); //otherwise just do normally
}
}
?>
pillepop2003 at nospam dot yahoo dot de ¶
19 years ago
Hey guys,
check this function if you want to rotate the text around its center and not its "lower left" pivot-point:
<?php
// Put center-rotated ttf-text into image
// Same signature as imagettftext();
function imagettftext_cr(&$im, $size, $angle, $x, $y, $color, $fontfile, $text)
{
// retrieve boundingbox
$bbox = imagettfbbox($size, $angle, $fontfile, $text);
// calculate deviation
$dx = ($bbox[2]-$bbox[0])/2.0 - ($bbox[2]-$bbox[4])/2.0; // deviation left-right
$dy = ($bbox[3]-$bbox[1])/2.0 + ($bbox[7]-$bbox[1])/2.0; // deviation top-bottom
// new pivotpoint
$px = $x-$dx;
$py = $y-$dy;
return imagettftext($im, $size, $angle, $px, $py, $color, $fontfile, $text);
}
?>
Big up
Phil
JohnB ¶
14 years ago
Just in case you were--like me--unaware of this, in Windows, ttf fonts don't necessarily antialias at all font sizes. Arial appears to work at all sizes but Calibri, for example, only antialiases at a point size of 8 and then at all sizes 16 and up. Not only that but at fonts sizes like 10 and 12 characters don't print at the expected angle: the characters are all printed upright on an angled baseline.
philip at webdesco dot com ¶
15 years ago
Hi,
for the dummies (like myself) if you are having problems including your font file, prefix the file name with ./
On my development server the following worked fine
$myfont = "coolfont.ttf";
on my hosting server the only way i could get the font to work was as follows
$myfont = "./coolfont.ttf";
hope this helps someone out!
web at evanreeves dot com ¶
15 years ago
I was having trouble trying to render non antialiased text using a pixel font. The tips about setting a negative value for the color are valid, but I was still having trouble with the text I was trying to render because it was black. I discovered that if I changed the imagecolorallocate() function from:
$color = imagecolorallocate($base, 0, 0, 0);
to
$color = imagecolorallocate($base, 1, 1, 1); (near black)
and then used the negative value for the color in imagettftext(), it would work properly. The difference is that my first implementation set $color = 0. Obviously, you can't have $color = -0, it made no difference. When I switched to (1,1,1) it became $color = 1 which I could take a negative value for.
John Conde ¶
14 years ago
If you want to create a paragraph you will need to break your text up into lines and then place each line individually one below the next.
Here's a basic example of how to do that:
<?php
// Basic font settings
$font ='./times.ttf';
$font_size = 15;
$font_color = 0x000000
// Text to be placed as a paragraph
$text = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer non nunc lectus. Curabitur hendrerit bibendum enim dignissim tempus. Suspendisse non ipsum auctor metus consectetur eleifend. Fusce cursus ullamcorper sem nec ultricies. Aliquam erat volutpat. Vivamus massa justo, pharetra et sodales quis, rhoncus in ligula. Integer dolor velit, ultrices in iaculis nec, viverra ut nunc.';
// Break it up into pieces 125 characters long
$lines = explode('|', wordwrap($text, 115, '|'));
// Starting Y position
$y = 513;
// Loop through the lines and place them on the image
foreach ($lines as $line)
{
imagettftext($image, $font_size, 0, 50, $y, $font_color, $font, $line);
// Increment Y so the next line is below the previous line
$y += 23;
}
?>
badrou14 at yahoo dot fr ¶
3 years ago
for windows you can use this code thanks to Ohmycode
the link of his solution : https://ohmycode.wordpress.com/2008/09/20/imagettftext-gdfontpath-et-ttf-sous-windows/
<?php
$font = realpath(".")."\\arial.ttf";
$black = imagecolorallocate($im, 0, 0, 0);
$im = imagecreatetruecolor(400, 30);
imagettftext($im, 20, 0, 10, 20, $black, $font, "coucou");
?>
ben at spooty dot net ¶
15 years ago
Here's a simple function to wrap text going into an image. It'll wrap onto as many lines as it needs to, but $angle has to be zero. The $width parameter is the width of the image.
<?php
function wrap($fontSize, $angle, $fontFace, $string, $width){
$ret = "";
$arr = explode(' ', $string);
foreach ( $arr as $word ){
$teststring = $ret.' '.$word;
$testbox = imagettfbbox($fontSize, $angle, $fontFace, $teststring);
if ( $testbox[2] > $width ){
$ret.=($ret==""?"":"\n").$word;
} else {
$ret.=($ret==""?"":' ').$word;
}
}
return $ret;
}
?>
matt at mmkennedy dot net ¶
16 years ago
For anyone attempting to print black barcodes, and trying to turn of anti-aliasing, remember that -1 * [0,0,0] is 0, not -0.
dotpointer ¶
16 years ago
For those trying to disable the font smoothing or font cleartype:ing, take a look at the color parameter for this function. The correct word for what you're looking for is antialiasing.
lassial at gmail dot com ¶
17 years ago
Roy van Arem suggested a neat code for listing TTFs on a machine. However, it has some problems (such as lower and upper case distinction of file extension and defective fonts) that I have corrected in the following script, which can be implemented as a single PHP script (name as you like):
<?php //make sure there are no blank lines above
$ffolder="/usr/local/bin/fonts"; //The directory where your fonts reside
if (empty($_GET['f']))
{
$folder=dir($ffolder); //open directory
echo "<HTML><BODY>\n";
while($font=$folder->read())
if(stristr($font,'.ttf')) //only ttf fonts
$fonts[]=$font;
$folder->close();
if (!empty($fonts))
{
echo "<table><tr><th colspan='2'>Fonts available in $ffolder</th></tr>"
."\n<tr><th>Name</th><th>Appereance</th>";
sort($fonts);
foreach ($fonts as $font)
echo "<tr><td>$font</td><td> <IMG src='".$_SERVER['SCRIPT_NAME']
."?f=$font'></td></tr>\n";
}
else echo "No fonts found from $ffolder";
echo "\n</HTML></BODY>";
}
else
{
$im=@imagecreatetruecolor(200,30)
or die("Cannot Initialize new GD image stream");
$black=imagecolorallocate($im,0,0,0);
$white=imagecolorallocate($im,255,255,255);
imagefill($im,0,0,$white);
imagettftext($im,14,0,5,25,$black, "$ffolder/".$_GET['f'] , $_GET['f']);
header("Content-type: image/png");
header('Content-Length: ' . strlen($im));
imagepng($im);
imagedestroy($im);
}
?>
ultraniblet at gmail dot com ¶
17 years ago
I have found the kerning (spacing between letters) pretty poor with GD - it's not up to your average designer's standards. Here are some ways to improve it:
- Place the letters one by one using their bounding box instead of using one string
- adjust with a $kerning value
- For small text, sample it down from a larger size to adjust in increments less than 1px
Eg:
<?PHP
$STRING = "NOTRE PHILOSOPHIE";
// ---- PRESETS
$FONT = "CantoriaMTStd-SemiBold.otf";
$FONT_SIZE = 10.5;
$WIDTH = 200;
$HEIGHT = 16;
$KERNING = 0;
$BASELINE = 12;
$BG_COLOR = array(
"R"=>5,
"G"=>45,
"B"=>53
);
$TXT_COLOR = array(
"R"=>188,
"G"=>189,
"B"=>0
);
// ---- CREATE CANVAS + PALETTE
$canvas = imageCreateTrueColor($WIDTH*4,$HEIGHT*4);
$bg_color = imageColorAllocate($canvas, $BG_COLOR["R"], $BG_COLOR["G"], $BG_COLOR["B"]);
$txt_color = imageColorAllocate($canvas, $TXT_COLOR["R"], $TXT_COLOR["G"], $TXT_COLOR["B"]);
imagefill ( $canvas, 0, 0, $bg_color );
// ---- DRAW
$array = str_split($STRING);
$hpos = 0;
for($i=0; $i<count($array); $i++)
{
$bbox = imagettftext( $canvas, $FONT_SIZE*4, 0, $hpos, $BASELINE*4, $txt_color, $FONT, $array[$i] );
$hpos = $bbox[2]+$KERNING;
}
// ---- SAMPLE DOWN & OUTPUT
$final = imageCreateTrueColor($WIDTH,$HEIGHT);
imageCopyResampled( $final, $canvas, 0,0,0,0, $WIDTH, $HEIGHT, $WIDTH*4, $HEIGHT*4 );
header('Content-type: image/png');
imagePNG($final);
imageDestroy($canvas);
imageDestroy($final);
?>
Tom Pike ¶
18 years ago
Ref: Craig at frostycoolslug dot com
"Using the negative of a color index has the effect of turning off antialiasing."
This is true, but only if the image has been created with imagecreate() (as opposed to imagecreatetruecolor())
Craig at frostycoolslug dot com ¶
18 years ago
This one caught me out a little bit as confusing, so in an attempt to help others..
"Using the negative of a color index has the effect of turning off antialiasing."
Simply put:
<?php
$textColour = ImageColorAllocate($image, 255, 255, 255);
ImageTTFText($image, 8, 0, 0, 0, -$textColour, $font, $text);
?>
Note the - (minus) before the $textColor in ImageTTFText, this creates the negative colour index, and switches off AA on text.
Mer`Zikain ¶
18 years ago
I was looking for a way to add kerning to my text and finally just made this function to do it. Of course, if you're generating the size of the image based on the text you're putting in it, you'll have to figure out the new size to fit the new text width but I'm sure you can figure that out.
for($i=0;$i<strlen($text);$i++){
// Get single character
$value=substr($text,$i,1);
if($pval){ // check for existing previous character
list($lx,$ly,$rx,$ry) = imagettfbbox($fontsize,0,$font,$pval);
$nxpos+=$rx+3;
}else{
$nxpos=0;
}
// Add the letter to the image
imagettftext($im, $fontsize, 0, $nxpos, $ypos, $fontcolor, $font, $value);
$pval=$value; // save current character for next loop
}
mats dot engstrom at gmail dot com ¶
18 years ago
I'll second the note from --colobri--.
Just adding --with-ttf and --with-freetype-dir=/usr/lib/ on the ./configure and then doing a "make; make install" is not enough.
I had to do a "make clean" and then a "make install" in order to get the FreeType-support enabled.
Here are my relevant ./configure lines:
--with-gd \
--enable-gd-native-ttf \
--with-ttf \
--with-freetype-dir=/usr/lib/ \
--with-jpeg-dir=/usr/lib/libjpeg.so.62 \
--enable-exif \
alexey at NOSPAMPLS dot ozerov dot de ¶
19 years ago
Notice that the path to the TrueType font has to be included in open_basedir list if open_basedir restriction is activated in php.ini.
denis at reddodo dot com ¶
16 years ago
Small but very dangerous bug in function ttfWordWrappedText, written by waage, just try ttfWordWrappedText("aaaaa\naa",4) and your script will run into endless loop.
You can fix it with code below:
<?php
function ttfWordWrappedText_fixed($text, $strlen = 8) {
$text = urldecode($text);
$text = explode("\n", $text);
$i = 0;
foreach($text as $text)
{
while(strlen($text) > $strlen && strstr($text, ' ') !== FALSE) {
$startPoint = strpos($text, ' ');
$line[$i][] =substr($text,0,$startPoint);
$text = trim(strstr($text, ' '));
}
$line[$i][] = trim($text);
}
$line[$i][] = trim($text);
$i++;
}
return $line;
}
?>
better solutions is to check input text for lines longer than needed wrap point.
denis at reddodo dot com ¶
16 years ago
Small but very dangerous bug in function ttfWordWrappedText, written by waage, just try ttfWordWrappedText("aaaaa\naa",4) and your script will run into endless loop.
You can fix it with code below:
<?php
function ttfWordWrappedText_fixed($text, $strlen = 8) {
$text = urldecode($text);
$text = explode("\n", $text);
$i = 0;
foreach($text as $text)
{
while(strlen($text) > $strlen && stristr($text, ' ') !== FALSE) {
$startPoint = $strlen - 1;
while(substr($text, $startPoint, 1) != " ") {
$startPoint--;
}
$line[$i][] = trim(substr($text, 0, $startPoint));
$text = substr($text, $startPoint);
}
$line[$i][] = trim($text);
$i++;
}
return $line;
}
?>
better solutions is to check input text for lines longer than needed wrap point.
waage ¶
17 years ago
I had some issues trying to get both word wrapping and new line detection but with some of the help from the comments below i got this. (thanks to jwe for the main part of the code here)
<?php
function ttfWordWrappedText($text, $strlen = 38) {
$text = urldecode($text);
$text = explode("\n", $text);
$i = 0;
foreach($text as $text)
{
while(strlen($text) > $strlen) {
$startPoint = $strlen - 1;
while(substr($text, $startPoint, 1) != " ") {
$startPoint--;
}
$line[$i][] = trim(substr($text, 0, $startPoint));
$text = substr($text, $startPoint);
}
$line[$i][] = trim($text);
$i++;
}
return $line;
}
?>
This returns an array for each newline entered and subarray for each wordwrapped line to print.
ie.
Array
(
[0] => Array
(
[0] => This is the first long line
[1] => that i entered.
)
[1] => Array
(
[0] => And this is the new line after that.
)
)
admin at sgssweb dot com ¶
18 years ago
Another way of the bellow. After creating a child class of GMIPluggableSet class, which should override two method: getExpression() and getVariables(), throw it to a instance of FontImageGenerator class.
For example, the code follows:
<?php
require_once 'package.fig.php';
class SampleFontImagePluggableSet
extends GMIPluggableSet
{
var $defaultVariables = array(
"text" => null,
"size" => null,
"font" => null,
"color" => "0x000000",
"alpha" => "100",
"padding" => 0,
"width" => null,
"height" => null,
"align" => "left",
"valign" => "middle",
"bgcolor" => "0xffffff",
"antialias" => 4
);
function SampleFontImagePluggableSet() {
parent::GMIPluggableSet();
}
function getExpression() {
return "size {width}, {height};".
"autoresize none;".
"type gif, 256, {color: {bgcolor}};".
"padding {padding};".
"color {color: {bgcolor}};".
"fill;".
"color {color: {color}, {alpha}};".
"antialias {antialias};".
"font {font}, {size};".
"string {text}, 0, 0, {width}, {height}, {align}, {valign};";
}
function getVariables() {
return array_merge($this->defaultVariables, $_GET);
}
}
$pluggableSet = new SampleFontImagePluggableSet();
$fig = new FontImageGenerator();
$fig->setPluggableSet($pluggableSet);
$fig->execute();
?>
This output a image with the text defined in $_GET['text'], the font in $_GET['font'], the text color in $_GET['color'], the background in $_GET['bgcolor'], and so on.
The script file is available at: http://sgssweb.com/experiments/?file=PHPFontImageGenerator .
admin at phpru dot com ¶
18 years ago
On my conf: php5.1.2+apache 1.33
iconv() function works very well with all cyrillic encodings, so you needn't to write your function like win2uni
jwe ¶
18 years ago
Quick tip for anyone who is receiving text like in the example in this page (ie: through $_GET['text'] or something similar) and needs to format the text into multiple lines. The trick is finding the spaces...
<?php
$text = $_GET['text'];
// for a maximum of 38 characters on a line...
while(strlen($text) > 38) {
$startPoint = 37;
// find a space to break the line on
while(substr($text, $startPoint, 1) != " ") {
$startPoint--;
}
$line[] = trim(substr($text, 0, $startPoint));
$text = substr($text, $startPoint);
}
$line[] = trim($text);
?>
The result is an array called $line that contains all the lines of text you need to output in order.
The only tasks left are to determine the correct height of the image based on the font size you want to use. Don't forget to leave some padding space for punctuation and descenders between lines (commas, g, q, p, y, etc).
imagettftext is unbelievably useful when you need to create header images using non-standard fonts. Amazing. Huge thanks to the devs.
--Julian
plusplus7 at hotmail dot com ¶
20 years ago
If you are getting all rectangles instead of text, it may well mean that your ttf font is not opentype, particularly if it is an older freeware one. This requirement didn't exist in older versions so you may find that your font stops working after you upgrade. To fix this problem, try downloading the free MS Volt utility. From there, open your font file, and then click on Compile, and resave.
Anonymous ¶
17 years ago
Just to comment on Sohel Taslims great function...
if anyone needs to add BACKGROUND TRANSPARENCY to this kind of function (which almost does everyone one would want already) then add
$bg_color = imagecolorat($im,1,1);
imagecolortransparent($im, $bg_color);
ABOVE the "if($L_R_C == 0){ //Justify Left" line
damititi at gmail dot com ¶
16 years ago
First of all, thanks sk89q for the func! it was exactly I was looking for.
I made a change. Depending on the letter, the text were incorrect vertical aligned.
I replace the line:
$line_height = $dimensions[1] - $dimensions[7];
for the following:
$line_height = $size+4;
No matter if mama or jeje is written, the vertical position will be the same.
llewellyntd at gmail dot com ¶
16 years ago
Hi All,
I struggled for moths to do a decent text warp with GD lib. Here is the code that I made use of:
<?php
//word wrap
$warpText = wordwrap($text, 30, "\n");
//display text
imagettftext($image, $fontSize, 0, $x, $y, $fontColor, $font, $warpText);
?>
Hope this helps somebody.
Cheers
m0r1arty at mail dot ru ¶
16 years ago
Sorry my English.
I have trouble with using imagettftext under Windows.
I can't used short name of fonts(example "arial","arialbd.ttf" etc). PHP say what not find this font.
Manipulation with environment GDFONTPATH lost.
This is my solution
<?php
$dir=opendir('./font/');//directory with fonts
if($dir)
while($f=readdir($dir)){
if(preg_match('/\.ttf$/',$f)){
$font=explode('.',$f);
define($font[0],realpath('./font/'.$f));
}
}
if($dir)
closedir($dir);
?>
Directory "font" have two file: arial.ttf and arialbd.ttf
Now one can using constant font name by calling imagettftext:
imagettftext($img,12,0,25,28,$color,arialbd,'some text');
Roy van Arem ¶
18 years ago
If you want to display a list of fonts in a directory and see what they look like, you could do something like this:
<HTML><BODY>
<?php
$folder=dir("fonts/"); //The directory where your fonts reside
while($font=$folder->read())
{
if(stristr($font,'.ttf'))echo '<IMG SRC="img.php?'.substr($font,0,strpos($font,'.')).'">'; //only ttf fonts
}
$folder->close();
?>
</BODY></HTML>
The file for 'img.php' should be something like this:
<?php
$font=$_SERVER["QUERY_STRING"];
header("Content-type: image/png");
$im=@imagecreatetruecolor(200,30)or die("Cannot Initialize new GD image stream");
$black=imagecolorallocate($im,0,0,0);
$white=imagecolorallocate($im,255,255,255);
imagefill($im,0,0,$white);
imagettftext($im,18,0,5,25,$black,"fonts/".$font,$font);
imagepng($im);
imagedestroy($im);
?>
Something similar I implemented at http://font.beginstart.com
ben at evolutioncomputing co uk ¶
18 years ago
A centralised text watermark - of any length, that automatically sizes to about 70% of the width, and can be rotated to any angle.
<?php
/* Get image info */
$Image = @ImageCreateFromJPEG ("YourImage.jpg") ;
$sx = imagesx($Image) ;
$sy = imagesy($Image) ;
if ($WatermarkNeeded)
{
/* Set text info */
$Text="Copyright Ben Clay" ;
$Font="arial.ttf" ;
$FontColor = ImageColorAllocate ($Image,255,255,255) ;
$FontShadow = ImageColorAllocate ($Image,0,0,0) ;
$Rotation = 30 ;
/* Make a copy image */
$OriginalImage = ImageCreateTrueColor($sx,$sy) ;
ImageCopy ($OriginalImage,$Image,0,0,0,0,$sx,$sy) ;
/* Iterate to get the size up */
$FontSize=1 ;
do
{
$FontSize *= 1.1 ;
$Box = @ImageTTFBBox($FontSize,0,$Font,$Text);
$TextWidth = abs($Box[4] - $Box[0]) ;
$TextHeight = abs($Box[5] - $Box[1]) ;
}
while ($TextWidth < $sx*0.7) ;
/* Awkward maths to get the origin of the text in the right place */
$x = $sx/2 - cos(deg2rad($Rotation))*$TextWidth/2 ;
$y = $sy/2 + sin(deg2rad($Rotation))*$TextWidth/2 + cos(deg2rad($Rotation))*$TextHeight/2 ;
/* Make shadow text first followed by solid text */
ImageTTFText ($Image,$FontSize,$Rotation,$x+4,$y+4,$FontShadow,$Font,$Text);
ImageTTFText ($Image,$FontSize,$Rotation,$x,$y,$FontColor,$Font,$Text);
/* merge original image into version with text to show image through text */
ImageCopyMerge ($Image,$OriginalImage,0,0,0,0,$sx,$sy,50) ;
}
ImageJPEG ($Image) ;
?>
Ole Clausen ¶
17 years ago
Comment to: Sohel Taslim (03-Aug-2007 06:19)
Thanks for the function which I have modified a bit. In the new version the lines have equal space between them (the g's in your example create bigger space between the lines) - set by the parameter '$Leading'.
I have used the for-loop for better performance and slimmed the rest a little :)
/**
* @name : makeImageF
*
* Function for create image from text with selected font. Justify text in image (0-Left, 1-Right, 2-Center).
*
* @param String $text : String to convert into the Image.
* @param String $font : Font name of the text. Kip font file in same folder.
* @param int $Justify : Justify text in image (0-Left, 1-Right, 2-Center).
* @param int $Leading : Space between lines.
* @param int $W : Width of the Image.
* @param int $H : Hight of the Image.
* @param int $X : x-coordinate of the text into the image.
* @param int $Y : y-coordinate of the text into the image.
* @param int $fsize : Font size of text.
* @param array $color : RGB color array for text color.
* @param array $bgcolor : RGB color array for background.
*
*/
function imagettfJustifytext($text, $font="CENTURY.TTF", $Justify=2, $Leading=0, $W=0, $H=0, $X=0, $Y=0, $fsize=12, $color=array(0x0,0x0,0x0), $bgcolor=array(0xFF,0xFF,0xFF)){
$angle = 0;
$_bx = imageTTFBbox($fsize,0,$font,$text);
$s = split("[\n]+", $text); // Array of lines
$nL = count($s); // Number of lines
$W = ($W==0)?abs($_bx[2]-$_bx[0]):$W; // If Width not initialized by programmer then it will detect and assign perfect width.
$H = ($H==0)?abs($_bx[5]-$_bx[3])+($nL>1?($nL*$Leading):0):$H; // If Height not initialized by programmer then it will detect and assign perfect height.
$im = @imagecreate($W, $H)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, $bgcolor[0], $bgcolor[1], $bgcolor[2]); // RGB color background.
$text_color = imagecolorallocate($im, $color[0], $color[1], $color[2]); // RGB color text.
if ($Justify == 0){ //Justify Left
imagettftext($im, $fsize, $angle, $X, $fsize, $text_color, $font, $text);
} else {
// Create alpha-nummeric string with all international characters - both upper- and lowercase
$alpha = range("a", "z");
$alpha = $alpha.strtoupper($alpha).range(0, 9);
// Use the string to determine the height of a line
$_b = imageTTFBbox($fsize,0,$font,$alpha);
$_H = abs($_b[5]-$_b[3]);
$__H=0;
for ($i=0; $i<$nL; $i++) {
$_b = imageTTFBbox($fsize,0,$font,$s[$i]);
$_W = abs($_b[2]-$_b[0]);
//Defining the X coordinate.
if ($Justify == 1) $_X = $W-$_W; // Justify Right
else $_X = abs($W/2)-abs($_W/2); // Justify Center
//Defining the Y coordinate.
$__H += $_H;
imagettftext($im, $fsize, $angle, $_X, $__H, $text_color, $font, $s[$i]);
$__H += $Leading;
}
}
return $im;
}
simbiat at bk dot ru ¶
9 years ago
Another way to wrap and center using wordwrap and learning the number of lines in the result of that wordwrap
<?php
$text="privet privet privet privet privet privet2 privet2 privet2 privet2 privet2 privet3";
$text=wordwrap($text, 35, "\n", TRUE);
//setting the image header in order to proper display the image
header("Content-Type: image/png");
//try to create an image
$im = @imagecreate(460, 215)
or die("Cannot Initialize new GD image stream");
//set the background color of the image
$background_color = imagecolorallocate($im, 0x00, 0x00, 0x00);
//set the color for the text
$text_color = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
//adf the string to the image
$font = "verdana.ttf";
$font_size = 20;
$angle = 0;
$splittext = explode ( "\n" , $text );
$lines = count($splittext);
foreach ($splittext as $text) {
$text_box = imagettfbbox($font_size,$angle,$font,$text);
$text_width = abs(max($text_box[2], $text_box[4]));
$text_height = abs(max($text_box[5], $text_box[7]));
$x = (imagesx($im) - $text_width)/2;
$y = ((imagesy($im) + $text_height)/2)-($lines-2)*$text_height;
$lines=$lines-1;
imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font, $text);
}
imagepng($im);
imagedestroy($im);
?>
Borgso ¶
17 years ago
Right align out of "webmaster at higher-designs dot com" code
<?php
$color = imagecolorallocate($im, 0, 0, 0);
$font = 'visitor.ttf';
$fontsize = "12";
$fontangle = "0";
$imagewidth = imagesx($im);
$imageheight = imagesy($im);
$text = "My right align text";
$box = @imageTTFBbox($fontsize,$fontangle,$font,$text);
$textwidth = abs($box[4] - $box[0]);
$textheight = abs($box[5] - $box[1]);
$xcord = $imagewidth - ($textwidth)-2; // 2 = some space from right side.
$ycord = ($imageheight/2)+($textheight/2);
ImageTTFText ($im, $fontsize, $fontangle, $xcord, $ycord, $black, $font, $text);
?>
--Colibri-- ¶
18 years ago
If you have configured and compiled PHP with all the necessary command-line options and still get the error:
Fatal error: Call to undefined function imagettftext()
Try doing a "make clean" before building the php apache module:
./configure [...]
make clean
make
make install
This may solve your problem (and hopefully keep you from wasting hours trying different compile options!)
erik[at]phpcastle.com ¶
19 years ago
Remember!!!
When uploading a font to your website you have to set the transfer mode to binary. It took me some time to find out :P. Tried to download the font from my website and it was spoiled.
In your script, the path to your font, use realpath("arial.ttf") so there is no confusion about that.
jwe ¶
18 years ago
I found this line a little confusing:
"May include decimal numeric character references (of the form: €) to access characters in a font beyond position 127."
I was using a font that had apostrophes and quotes stored in a non-standard position, and so they were being rendered as spaces by imagettftext. This line seemed to suggest a solution, but it took a while to figure it out.
Turns out, a "decimal numeric character reference" is a decimal conversion of the hex value of the *unicode* position of the character you want. For a while I was trying ASCII positions (I knew the ALT+ code for typing the character I needed in Windows).
In the Windows XP character map, the unicode positions are shown as U+2018 or U+201C, etc. Ignore the U+ and convert that hex number to decimal, and then stick that in your text string with the &# on the front and ; on the end, and pass it to imagettftext.
--Julian