Description:
------------
---
From manual page: http://www.php.net/functions.user-defined
---

Regex in the following text requires a leading caret ("^"):

"A valid function name starts with a letter or underscore, followed by any number of letters, numbers, or underscores. As a regular expression, it would be expressed thus: [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*."

I.e., the regex should be ^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*. 

Otherwise the subject string '014A7' will match, and that is not in accordance with the text. The script was run under Bitnami wampstack-5.4.28-0.


Test script:
---------------
<?php
 
 $match_result = preg_match("/[a-zA-Z][a-zA-Z0-9]*./", '014A7');
 echo $match_result;
 $match_result = preg_match("/^[a-zA-Z][a-zA-Z0-9]*./", '014A7');
 echo $match_result;
?>


Actual result:
--------------
The script returns 0 for the first match, 1 for the second.