preg_grep

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Return array entries that match the pattern

preg_grep ( string $pattern , array $input [, int $flags = 0 ] ) : array

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.

<?

$pattern = "#^(\d+)?\.\d+$#";
$input = array(0, 1, 2.2, 3.3);

$return = preg_grep($pattern, $input);

print_r($return);

?>

Array
(
    [2] => 2.2
    [3] => 3.3
)

<?

$pattern = "#^(\d+)?\.\d+$#";
$input = array(0, 1, 2.2, 3.3);
$flags = PREG_GREP_INVERT;

$return = preg_grep($pattern, $input, $flags);

print_r($return);

?>

Array
(
    [0] => 0
    [1] => 1
)

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