How to match the string patterns in php -

i have array of strings

$x=array("hello","how","you","iam","fine")  

i tried extract 1 string pattern this

$y=preg_grep ("/hello(\w+)/", $x);  print_r($y); 

i want have multiple pattern search , return using 1 preg_grep can me over.

regex quantifier + means match 1 or more times. string hello doesn't fits, 'cause there're 0 symbols after hello. use * quantifier means match 0 or more times:

$x=array("hello","how","you","iam","fine"); $y=preg_grep ("/hello(\w*)/", $x); print_r($y); // outputs: array ( [0] => hello )