(PHP 4, PHP 5, PHP 7)
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.
patternThe pattern to search for, as a string.
inputThe 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.
Example #1 preg_grep() example
<?php
// return all array elements
// containing floating point numbers
$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
?>