str_ireplace

(PHP 5, PHP 7, PHP 8)

str_ireplace — Versione insensibile alle miuscole/minuscole di str_replace()

Descrizione

str_ireplace(
    mixed $search,
    mixed $replace,
    mixed $subject,
    int &$count = ?
): mixed

Questa funzione restituisce una stringa od una matrice con tutte le occorrenze di search in subject (non distinguendo tra maiuscole e minuscole) sostituite con il valore replace Se non occorrono particolari regole di sostituzione si dovrebbe utilizzare questa funzione anziché eregi_replace() o preg_replace() con il parametro i.

Se il parametro subject è una matrice, allora la ricerca e la sostituzione viene eseguita su ogni elemento di subject, ed il valore restituito è pure quello una matrice.

Se search e replace sono matrici, allora str_ireplace() prende i valori da ciascuna matrice e li utilizza per fare la ricerca e la sostituzione in subject. Se replace ha meno valori di search, allora si utilizza una stringa vuota per sostituire i valori mancanti. Se search è una matrice e replace è una stringa; allora questa stringa viene utilizzata per sostituire ogni valore di search.

Example #1 Esempio di uso di str_ireplace()

<?php
$bodytag = str_ireplace("%body%", "black", "<body text=%BODY%>");
?>

Questa funzione è sicura con i dati binari.

Nota: Dal PHP 5.0.0 il numero dei testi trovati e sostituiti sarà restituito in count che deve essere passato per riferimento. Prima del PHP 5.0.0 questo parametro non è disponibile.

Vedere anche: str_replace(), ereg_replace(), preg_replace() e strtr().

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User Contributed Notes 11 notes

down

Tom ¶

6 months ago

Attention! str_ireplace does not destroy multibyte characters. But multibyte characters are not replaced case-insensitively. 

<?php
echo  str_ireplace('Ä', 'Ae_', 'Ägypten');  // Ae_gypten
echo  str_ireplace('ä', 'ae_', 'ägypten');  // ae_gypten
echo  str_ireplace('ä', 'ae_', 'Ägypten');  // Ägypten
echo  str_ireplace('Ä', 'ae_', 'ägypten');  // ägypten
echo  str_ireplace('E', 'e_', 'egypt');  // e_gypt
echo  str_ireplace('e', 'e_', 'Egypt');  // e_gypt
echo  str_ireplace('ä', 'ae_', mb_strtolower('Ägypten'));  // ae_gypten

down

sawdust ¶

15 years ago

Here's a different approach to search result keyword highlighting that will match all keyword sub strings in a case insensitive manner and preserve case in the returned text. This solution first grabs all matches within $haystack in a case insensitive manner, and the secondly loops through each of those matched sub strings and applies a case sensitive replace in $haystack. This way each unique (in terms of case) instance of $needle is operated on individually allowing a case sensitive replace to be done in order to preserve the original case of each unique instance of $needle.

<?php
function highlightStr($haystack, $needle, $highlightColorValue) {
     // return $haystack if there is no highlight color or strings given, nothing to do.
    if (strlen($highlightColorValue) < 1 || strlen($haystack) < 1 || strlen($needle) < 1) {
        return $haystack;
    }
    preg_match_all("/$needle+/i", $haystack, $matches);
    if (is_array($matches[0]) && count($matches[0]) >= 1) {
        foreach ($matches[0] as $match) {
            $haystack = str_replace($match, '<span style="background-color:'.$highlightColorValue.';">'.$match.'</span>', $haystack);
        }
    }
    return $haystack;
}
?>

down

daevid at daevid dot com ¶

19 years ago

here's a neat little function I whipped up to do HTML color coding of SQL strings. 



<?php

/**

 * Output the HTML debugging string in color coded glory for a sql query

 * This is very nice for being able to see many SQL queries

 * @access     public

 * @return     void. prints HTML color coded string of the input $query.

 * @param     string $query The SQL query to be executed.

 * @author     Daevid Vincent [daevid@LockdownNetworks.com]

 *  @version     1.0

 * @date        04/05/05

 * @todo     highlight SQL functions.

 */

function SQL_DEBUG( $query )

{

    if( $query == '' ) return 0;



    global $SQL_INT;

    if( !isset($SQL_INT) ) $SQL_INT = 0;



    //[dv] this has to come first or you will have goofy results later.

    $query = preg_replace("/['\"]([^'\"]*)['\"]/i", "'<FONT COLOR='#FF6600'>$1</FONT>'", $query, -1);



    $query = str_ireplace(

                            array (

                                    '*',

                                    'SELECT ',

                                    'UPDATE ',

                                    'DELETE ',

                                    'INSERT ',

                                    'INTO',

                                    'VALUES',

                                    'FROM',

                                    'LEFT',

                                    'JOIN',

                                    'WHERE',

                                    'LIMIT',

                                    'ORDER BY',

                                    'AND',

                                    'OR ', //[dv] note the space. otherwise you match to 'COLOR' ;-)

                                    'DESC',

                                    'ASC',

                                    'ON '

                                  ),

                            array (

                                    "<FONT COLOR='#FF6600'><B>*</B></FONT>",

                                    "<FONT COLOR='#00AA00'><B>SELECT</B> </FONT>",

                                    "<FONT COLOR='#00AA00'><B>UPDATE</B> </FONT>",

                                    "<FONT COLOR='#00AA00'><B>DELETE</B> </FONT>",

                                    "<FONT COLOR='#00AA00'><B>INSERT</B> </FONT>",

                                    "<FONT COLOR='#00AA00'><B>INTO</B></FONT>",

                                    "<FONT COLOR='#00AA00'><B>VALUES</B></FONT>",

                                    "<FONT COLOR='#00AA00'><B>FROM</B></FONT>",

                                    "<FONT COLOR='#00CC00'><B>LEFT</B></FONT>",

                                    "<FONT COLOR='#00CC00'><B>JOIN</B></FONT>",

                                    "<FONT COLOR='#00AA00'><B>WHERE</B></FONT>",

                                    "<FONT COLOR='#AA0000'><B>LIMIT</B></FONT>",

                                    "<FONT COLOR='#00AA00'><B>ORDER BY</B></FONT>",

                                    "<FONT COLOR='#0000AA'><B>AND</B></FONT>",

                                    "<FONT COLOR='#0000AA'><B>OR</B> </FONT>",

                                    "<FONT COLOR='#0000AA'><B>DESC</B></FONT>",

                                    "<FONT COLOR='#0000AA'><B>ASC</B></FONT>",

                                    "<FONT COLOR='#00DD00'><B>ON</B> </FONT>"

                                  ),

                            $query

                          );



    echo "<FONT COLOR='#0000FF'><B>SQL[".$SQL_INT."]:</B> ".$query."<FONT COLOR='#FF0000'>;</FONT></FONT><BR>\n";



    $SQL_INT++;



} //SQL_DEBUG

?>

down

Anteaus ¶

9 years ago

If you follow the instructions given here you will end up with code which works in php5.3 but which bugs-out in php5.4. Reason is that '&$count' (explicit pass by reference) is now an illegal construct.
Nasty, especially it leads to unreliable code which may work on test but not in production. Manual needs corrected!

down

stepanic dot matija at gmail dot com ¶

14 years ago

FIX-ed problem with highlighting second 'o' OR 'a', in this string



<?php

function highlight_string ($haystack, $needle, $highlight_class) {

         // return $haystack if there is no highlight color or strings given, nothing to do.

        

        $first_encode='XXXXXXXXXXXXXXX';     //ENCODE string



        $second_encode='YYYYYYYYYYYYYYY';

        

        preg_match_all("/$needle+/i", $haystack, $matches);

        if (is_array($matches[0]) && count($matches[0]) >= 1) {

            foreach ($matches[0] as $match) {

                $haystack = str_replace($match, $first_encode.$match.$second_encode, $haystack);

            }

        }

        

        $haystack=str_replace(array($first_encode,$second_encode),

array('<font class="'.$highlight_class.'" >','</font>'),$haystack);

        

        return $haystack;

}

?>

down

aidan at php dot net ¶

20 years ago

This functionality is now implemented in the PEAR package PHP_Compat.

More information about using this function without upgrading your version of PHP can be found on the below link:

http://pear.php.net/package/PHP_Compat

down

ishutko at gmail dot com ¶

15 years ago

For function work with cirilic

setlocale (LC_ALL, 'ru_RU');

down

Psudo - thepsudo at gmail dot com ¶

13 years ago

For highlighting without the overhead of regex and without destroying capitalization, try this:



<?php

function highlight($needle, $haystack){

    $ind = stripos($haystack, $needle);

    $len = strlen($needle);

    if($ind !== false){

        return substr($haystack, 0, $ind) . "<b>" . substr($haystack, $ind, $len) . "</b>" .

            highlight($needle, substr($haystack, $ind + $len));

    } else return $haystack;

}

?>



This example uses HTML bold tags, but you can easily change the highlighting method.

down

-1

Michael dot Bond at mail dot wvu dot edu ¶

15 years ago

This function will highlight search terms (Key Words in Context). 



The difference between this one and the ones below is that it will preserve the original case of the search term as well. So, if you search for "american" but in the original string it is "American" it will retain the capital "A" as well as the correct case for the rest of the string. 



<?php

function kwic($str1,$str2) {

    

    $kwicLen = strlen($str1);



    $kwicArray = array();

    $pos          = 0;

    $count       = 0;



    while($pos !== FALSE) {

        $pos = stripos($str2,$str1,$pos);

        if($pos !== FALSE) {

            $kwicArray[$count]['kwic'] = substr($str2,$pos,$kwicLen);

            $kwicArray[$count++]['pos']  = $pos;

            $pos++;

        }

    }



    for($I=count($kwicArray)-1;$I>=0;$I--) {

        $kwic = '<span class="kwic">'.$kwicArray[$I]['kwic'].'</span>';

        $str2 = substr_replace($str2,$kwic,$kwicArray[$I]['pos'],$kwicLen);

    }

        

    return($str2);

}

?>

down

-2

hfuecks at nospam dot org ¶

19 years ago

Note that character case is being defined by your server's locale setting, which effects strings containing non-ASCII characters.

See strtolower() - http://www.php.net/strtolower and comments - internally str_ireplace converts $search and $replace to lowercase to find matches.

down

-4

holblin at holblin dot com ¶

13 years ago

Warning with highlighting ...



I used :



<?php

$text = preg_replace('/('.$q.')/i','<span class=highlighting "">$1</span>' , $text);

?>



Because this line do not allow to highlight uppercase and lowercase correctly (transform uppercase to lowercase for exemple)



<?php

 $text = str_ireplace( $q , '<span class=highlighting "">'.$q.'</span>', $text);

?>



But when $q contain some regex you have some problems ... for exemple :

<?php $q = '('; ?>



So you must use preg_replace to highlight correctly the text and you must create a function for escape bad regex caracters !



I think that a better function can be found but this works I guess :



<?php

function regex_escape( $q )

{

    return preg_replace('/([\[\]\(\)\{\}\-\.\*\?\|\^\$])/', '\$1', $q);

}

?>

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