preg_grep Return array entries that match the pattern arraypreg_grep stringpattern arrayinput intflags preg_grep returns the array consisting of the elements of the input array that match the given pattern. flags can be the following flag: PREG_GREP_INVERT If this flag is passed, preg_grep returns the elements of the input array that do not match the given pattern. This flag is available since PHP 4.2.0. 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. ]]>