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preg_replace_callback_array

(PHP 7)

preg_replace_callback_arrayPerform a regular expression search and replace using callbacks

Descrierea

mixed preg_replace_callback_array ( array $patterns_and_callbacks , mixed $subject [, int $limit = -1 [, int &$count ]] )

The behavior of this function is similar to preg_replace_callback(), except that callbacks are executed on a per-pattern basis.

Parametri

patterns_and_callbacks

An associative array mapping patterns (keys) to callbacks (values).

subject

The string or an array with strings to search and replace.

limit

The maximum possible replacements for each pattern in each subject string. Defaults to -1 (no limit).

count

If specified, this variable will be filled with the number of replacements done.

Valorile întoarse

preg_replace_callback_array() returns an array if the subject parameter is an array, or a string otherwise. On errors the return value is NULL

If matches are found, the new subject will be returned, otherwise subject will be returned unchanged.

Exemple

Example #1 preg_replace_callback_array() example

<?php
$subject 
'Aaaaaa Bbb';

preg_replace_callback_array(
    [
        
'~[a]+~i' => function ($match) {
            echo 
strlen($match[0]), ' matches for "a" found'PHP_EOL;
        },
        
'~[b]+~i' => function ($match) {
            echo 
strlen($match[0]), ' matches for "b" found'PHP_EOL;
        }
    ],
    
$subject
);
?>

Exemplul de mai sus va afișa:

6 matches for "a" found
3 matches for "b" found

A se vedea și

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User Contributed Notes 2 notes

up
7
drevilkuko at gmail dot com
1 year ago
finally!!!

before (<=php5.6):

<?php
        $htmlString
= preg_replace_callback(
           
'/(href="?)(\S+)("?)/i',
            function (&
$matches) {
                return
$matches[1] . urldecode($matches[2]) . $matches[3];
            },
           
$htmlString
       
);

       
$htmlString = preg_replace_callback(
           
'/(href="?\S+)(%24)(\S+)?"?/i', // %24 = $
           
function (&$matches) {
                return
urldecode($matches[1] . '$' . $matches[3]);
            },
           
$htmlString
       
);
?>

php7

<?php

        $htmlString
= preg_replace_callback_array(
            [
               
'/(href="?)(\S+)("?)/i' => function (&$matches) {
                    return
$matches[1] . urldecode($matches[2]) . $matches[3];
                },
               
'/(href="?\S+)(%24)(\S+)?"?/i' => function (&$matches) {
                    return
urldecode($matches[1] . '$' . $matches[3]);
                }
            ],
           
$htmlString
       
);
?>
up
1
jfcherng at NOSPAM dot gmail dot com
1 year ago
Here's a possible alternative in older PHP.

<?php

// if (!function_exists('preg_replace_callback_array')) {

function preg_replace_callback_array (array $patterns_and_callbacks, $subject, $limit=-1, &$count=NULL) {
   
$count = 0;
    foreach (
$patterns_and_callbacks as $pattern => &$callback) {
       
$subject = preg_replace_callback($pattern, $callback, $subject, $limit, $partial_count);
       
$count += $partial_count;
    }
    return
preg_last_error() == PREG_NO_ERROR ? $subject : NULL;
}

// }

?>
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