Funcții PCRE
PHP Manual

preg_grep

(PHP 4, PHP 5)

preg_grepReturn array entries that match the pattern

Descrierea

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.

Parametri

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.

Valorile întoarse

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

Istoria schimbărilor

Versiunea Descriere
4.2.0 The flags parameter was added.
4.0.4

Prior to this version, the returned array was indexed regardless of the keys of the input array.

If you want to reproduce this old behavior, use array_values() on the returned array to reindex the values.

Exemple

Example #1 preg_grep() example

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

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Funcții PCRE
PHP Manual