preg_grep
Description
Syntax
preg_grep(string $pattern, array $array, int $flags = 0): array|false
Parameters
pattern
The pattern to search for, as a string.
array
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.
Return
Returns an array indexed using the keys from the array array, or false on failure.
Examples
1 · pattern array
<? $pattern = "#^(\d+)?\.\d+$#"; $array = array(0, 1.1, 22.22, 333.333, 4); $return = preg_grep($pattern, $array); print_r($return); ?>
Array
(
[1] => 1.1
[2] => 22.22
[3] => 333.333
)
2 · flags
<? $pattern = "#^(\d+)?\.\d+$#"; $array = array(0, 1.1, 22.22, 333.333, 4); $flags = PREG_GREP_INVERT; $return = preg_grep($pattern, $array, $flags); print_r($return); ?>
Array
(
[0] => 0
[4] => 4
)
