PHP preg_grep() Function

Get items from an array which begin with "p":

<?php
$input = [
"Red",
"Pink",
"Green",
"Blue",
"Purple"
];

$result = preg_grep("/^p/i", $input);
print_r($result);
?>

Definition and Usage

The preg_grep() function returns an array containing only elements from the input that match the given pattern.

preg_grep( pattern, input, flags)

Parameter	Description
pattern	Required. Contains a regular expression indicating what to search for
input	Required. An array of strings
flags	Optional. There is only one flag for this function. Passing the constant `PREG_GREP_INVERT` will make the function return only items that do not match the pattern.

Return Value:	Returns an array containing strings that matched the provided pattern
PHP Version:	4+