PHP Functions Essential Reference

preg_match

int preg_match(string pattern, string subject, [array matches]) 

pattern	Regex pattern to match
subject	String to search using the pattern
matches	Array in which to store the search results

Performs the regular expression match against the specified string.

Returns:

1 if a match is found; 0 otherwise

Description:

This function tries to find the first match for the regular expression pattern in the supplied subject string. If the matches parameter is supplied, it should be a valid variable, such as $matches, since the function forces it to be passed by reference. Existing contents of this variable are overwritten with the results of the successful search. $matches[0] contains the text from the subject string that matched the full ...