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preg_grep

PHP function Edit on GitHub ✎

(PHP 4, PHP 5, PHP 7, PHP 8)

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, Falseforfailure.

Errors/Exceptions Warning

Examples

preg_grep() example

php

<?php
$array = [ "4", M_PI, "2.74", 42 ];

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

var_dump($fl_array);
?>