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--TEST-- Test strncmp() function : error conditions --FILE-- <?php /* Prototype : int strncmp ( string $str1, string $str2, int $len ); * Description: Binary safe case-sensitive string comparison of the first n characters * Source code: Zend/zend_builtin_functions.c */ /* Test strncmp() function with more/less number of args and invalid args */ echo "*** Testing strncmp() function: error conditions ***\n"; $str1 = 'string_val'; $str2 = 'string_val'; $len = 10; $extra_arg = 10; var_dump( strncmp() ); //Zero argument var_dump( strncmp($str1) ); //One argument, less than expected no. of args var_dump( strncmp($str1, $str2) ); //Two arguments, less than expected no. of args var_dump( strncmp($str1, $str2, $len, $extra_arg) ); //Four arguments, greater than expected no. of args /* Invalid argument for $len */ $len = -10; var_dump( strncmp($str1, $str2, $len) ); echo "*** Done ***\n"; ?> --EXPECTF-- *** Testing strncmp() function: error conditions *** Warning: strncmp() expects exactly 3 parameters, 0 given in %s on line %d NULL Warning: strncmp() expects exactly 3 parameters, 1 given in %s on line %d NULL Warning: strncmp() expects exactly 3 parameters, 2 given in %s on line %d NULL Warning: strncmp() expects exactly 3 parameters, 4 given in %s on line %d NULL Warning: Length must be greater than or equal to 0 in %s on line %d bool(false) *** Done ***