. PHP Manual . Prev . Next . (PHP 4 >= 4.0.0) substr_count -- Count the number of substring occurrences . int substr_count ( string haystack, string needle) . substr_count() returns the number of times the needle substring occurs in the haystack string. Example 1. substr_count() example . print substr_count("This is a test", "is"); // prints out 2 . Prev . Home . Next . substr . Up . substr_replace