php - How can I get a unknown number from a string within a certain part of the string? -


my string:

how rate ease , comfort required undertake session?@question_value_0

how able value above string? don't know value (apart integer):

(some question)@question_value_x x integer, want x.

i looked regex, suck @ regular expressions, i'm @ loss, cheers guys!

about far got regex

/@question_value_[0-9]+/

but can't number out of string. how can grab number?

this should work you:

just put escape sequence \d (which means 0-9) quantifier + (which means 1 or more times) group (()) capture the number can access in array $m.

<?php      $str = "how rate ease , comfort required undertake session?@question_value_0";     preg_match("/@question_value_(\d+)/", $str, $m);     echo $m[1];  ?>

output:

0

if print_r($m); see structure of array:

array (     [0] => @question_value_0     [1] => 0 )

and see ^ have full match in first element , first group ((\d+)) in second element.


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