(PHP 4, PHP 5, PHP 7, PHP 8)
nl2br — 改行文字の前に HTML の改行タグを挿入する
string に含まれるすべての改行文字 (\r\n、
\n\r、\n および \r)
の前に <br /> あるいは <br> を挿入して返します。
string入力文字列。
use_xhtmlXHTML 準拠の改行を使うか否か。
変更後の文字列を返します。
例1 nl2br() の使用法
<?php
echo nl2br("foo isn't\n bar");
?>上の例の出力は以下となります。
foo isn't<br /> bar
例2 use_xhtml パラメータを使い、妥当な HTML 形式のマークアップを生成する
<?php
echo nl2br("Welcome\r\nThis is my HTML document", false);
?>上の例の出力は以下となります。
Welcome<br> This is my HTML document
例3 さまざまな改行文字
<?php
$string = "This\r\nis\n\ra\nstring\r";
echo nl2br($string);
?>上の例の出力は以下となります。
This<br /> is<br /> a<br /> string<br />
It's important to remember that this function does NOT replace newlines with <br> tags. Rather, it inserts a <br> tag before each newline, but it still preserves the newlines themselves! This caused problems for me regarding a function I was writing -- I forgot the newlines were still being preserved.
If you don't want newlines, do:
<?php
$Result = str_replace( "\n", '<br />', $Text );
?>to replace all linebreaks to <br />
the best solution (IMO) is:
<?php
function nl2br2($string) {
$string = str_replace(array("\r\n", "\r", "\n"), "<br />", $string);
return $string;
}
?>
because each OS have different ASCII chars for linebreak:
windows = \r\n
unix = \n
mac = \r
works perfect for meHere's a more simple one:<?php/** * Convert BR tags to nl * * @param string The string to convert * @return string The converted string */function br2nl($string){ return preg_replace('/\<br(\s*)?\/?\>/i', "\n", $string);}?>EnjoyStarting from PHP 4.3.10 and PHP 5.0.2, this should be the most correct way to replace <br /> and <br> tags with newlines and carriage returns.<?php/** * Convert BR tags to newlines and carriage returns. * * @param string The string to convert * @return string The converted string */function br2nl ( $string ){ return preg_replace('/\<br(\s*)?\/?\>/i', PHP_EOL, $string);}?>(Please note this is a minor edit of this function: http://php.net/nl2br#86678 )You might also want to be "platform specific", and therefore this function might be of some help:<?php/** * Convert BR tags to newlines and carriage returns. * * @param string The string to convert * @param string The string to use as line separator * @return string The converted string */function br2nl ( $string, $separator = PHP_EOL ){ $separator = in_array($separator, array("\n", "\r", "\r\n", "\n\r", chr(30), chr(155), PHP_EOL)) ? $separator : PHP_EOL; // Checks if provided $separator is valid. return preg_replace('/\<br(\s*)?\/?\>/i', $separator, $string);}?>double quotes !== single quotesphp > echo nl2br('\r\n');\r\nphp > echo nl2br("\r\n");<br />Seeing all these suggestions on a br2nl function, I can also see that neither would work with a sloppy written html line break.. Users can't be trusted to write good code, we know that, and mixing case isn't too uncommon.I think this little snippet would do most tricks, both XHTML style and HTML, even mixed case like <Br> <bR /> and even <br > or <br />.<?phpfunction br2nl($text){ return preg_replace('/<br\\s*?\/??>/i', '', $text);}?>