preg_grep

(PHP 4, PHP 5)

preg_grep — Return array entries that match the pattern

Description

array preg_grep ( string $pattern , array $input [, int $flags = 0 ] )

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

Parameters

pattern

The pattern to search for, as a string.

input

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 input 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_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