(PHP 4, PHP 5)
preg_grep — Return array entries that match the pattern
$pattern
, array $input
[, int $flags = 0
] )
Returns the array consisting of the elements of the
input array that match the given
pattern.
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.
Returns an array indexed using the keys from the
input array.
| Version | Description |
|---|---|
| 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 If you want to reproduce this old behavior, use array_values() on the returned array to reindex the values. |
Example #1 preg_grep() example
<?php
// return all array elements
// containing floating point numbers
$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
?>