W3cubDocs

/PHP

preg_grep

(PHP 4, PHP 5, PHP 7)

preg_grep — Return array entries that match the pattern

Description

preg_grep ( string $pattern , array $array [, int $flags = 0 ] ) : array|false

Returns the array consisting of the elements of the array array that match the given pattern.

Parameters

pattern: The pattern to search for, as a string.
array: The input array.
flags: If set to PREG_GREP_INVERT, this function returns the elements of the input array that do not match the given pattern.

Return Values

Returns an array indexed using the keys from the array array.

Examples

Example #1 preg_grep() example

<?php
// return all array elements
// containing floating point numbers
$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
?>

See Also

PCRE Patterns
preg_quote() - Quote regular expression characters
preg_match_all() - Perform a global regular expression match
preg_filter() - Perform a regular expression search and replace
preg_last_error() - Returns the error code of the last PCRE regex execution

© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.preg-grep.php