Rabu, 07 September 2011
Preg-match is the Perl regular expression-match engine for PHP.
It turns out that, additional match quantifiers should be avoided.
To demonstrate this, follow this code snippet:
The return value of preg_match_all in this case was 65, basically a count of each character of the input.
count($matches) will correctly yield '2', as empty array-elements are not counted.
Note: preg_match_all is a shortcut function which adds an quantifier to the match. As such the correct pattern will be /(....)/ not /(....)*/
It turns out that, additional match quantifiers should be avoided.
To demonstrate this, follow this code snippet:
The return value of preg_match_all in this case was 65, basically a count of each character of the input.
count($matches) will correctly yield '2', as empty array-elements are not counted.
Note: preg_match_all is a shortcut function which adds an quantifier to the match. As such the correct pattern will be /(....)/ not /(....)*/