(PHP 4 >= 4.0.0)

preg_grep --  Return array entries that match the pattern


array preg_grep (string pattern, array input)

preg_grep() returns the array consisting of the elements of the input array that match the given pattern.

Since PHP 4.0.4, the results returned by preg_grep() are indexed using the keys from the input array. If this behavior is undesirable, use array_values() on the array returned by preg_grep() to reindex the values.

Example 1. preg_grep() example

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