Find character before or after of string using preg_grep() in PHP

Question

I need to find any character before or after of a word using PHP preg_grep() from array. I have a array like following

$findgroup = array(\"aphp\", \"

Answer 1

Anchor your regex and add quantifier for character before and after:

$findgroup = array("aphp", "phpb", "dephpfs", "potatoes", "aphpb", "php");
$result = preg_grep("/^(?:.{1,2}php|php.{1,2})$/", $findgroup);       
print_r($result);

Output:

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