php man page for preg_grep

PREG_GREP(3)								 1							      PREG_GREP(3)

preg_grep - Return array entries that match the pattern

SYNOPSIS
       array preg_grep (string	$pattern, array  $input, [int  $flags])

DESCRIPTION
	Returns the array consisting of the elements of the $input array that match the given $pattern.

PARAMETERS
	      o $pattern
		- The pattern to search for, as a string.

	      o $input
		- The input array.

	      o $flags
		- If set to PREG_GREP_INVERT, this function returns the elements of the input array that do not match the given $pattern.

RETURN VALUES
	Returns an array indexed using the keys from the $input array.

EXAMPLES
       Example #1

	      preg_grep(3) example

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

SEE ALSO
       PCRE Patterns, preg_quote(3), preg_match_all(3), preg_filter(3), preg_last_error(3).

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