strncasecmp Binary safe case-insensitive string comparison of the first n characters &reftitle.description; intstrncasecmp stringstr1 stringstr2 intlen This function is similar to strcasecmp, with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison. &reftitle.parameters; str1 The first string. str2 The second string. len The length of strings to be used in the comparison. &reftitle.returnvalues; Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal. &reftitle.seealso; strncmp preg_match substr_compare strcasecmp stristr substr