preg_match('@\.php@',$url,$match)
Common:-
any others?
Should @, ?, = be escaped?
There is a list of special Regex characters in the PHP documentation here: http://php.net/manual/en/function.preg-quote.php
The special regular expression characters are:
. \ + * ? [ ^ ] $ ( ) { } = ! < > | : -
Perhaps you will find the preg_quote function useful:
preg_quote() takes str and puts a backslash in front of every character that is part of the regular expression syntax. This is useful if you have a run-time string that you need to match in some text and the string may contain special regex characters.
The special regular expression characters are: . \ + * ? [ ^ ] $ ( ) { } = ! < > | : -
@ and ? should be backslashified, = should not.
The characters you need to backslash escape in a regex include:
[](){}^$.|*+?\Additionally, your regex delimiter, in this case @, needs to be backslashified.
It is important to note that certain characters may be metacharacters in a certain context. For example, the hyphen is not a metacharacter in the regex denoted by this string:
"/foo-/"
But is a metacharacter in the following string:
"/foo[a-z]/"