preg_replace_callback_array
(PHP 7, PHP 8)
preg_replace_callback_array — Perform a regular expression search and replace using callbacks
Description
array
$pattern,string|array
$subject,int
$limit = -1,int
&$count = null,int
$flags = 0): string|array|null
The behavior of this function is similar to preg_replace_callback(), except that callbacks are executed on a per-pattern basis.
Parameters
-
pattern -
An associative array mapping patterns (keys) to callables (values).
-
subject -
The string or an array with strings to search and replace.
-
limit -
The maximum possible replacements for each pattern in each
subjectstring. Defaults to-1(no limit). -
count -
If specified, this variable will be filled with the number of replacements done.
-
flags -
flagscan be a combination of thePREG_OFFSET_CAPTUREandPREG_UNMATCHED_AS_NULLflags, which influence the format of the matches array. See the description in preg_match() for more details.
Return Values
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.
Errors/Exceptions
If the regex pattern passed does not compile to a valid regex, an E_WARNING is emitted.
Changelog
| Version | Description |
|---|---|
| 7.4.0 |
The flags parameter was added.
|
Examples
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
);
?>
The above example will output:
6 matches for "a" found 3 matches for "b" found
See Also
- PCRE Patterns
- preg_replace_callback() - Perform a regular expression search and replace using a callback
- preg_quote() - Quote regular expression characters
- preg_replace() - Perform a regular expression search and replace
- preg_last_error() - Returns the error code of the last PCRE regex execution
- Anonymous functions
