--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: Wrong parameter count for strncmp() in %s on line %d
NULL

Warning: Wrong parameter count for strncmp() in %s on line %d
NULL

Warning: Wrong parameter count for strncmp() in %s on line %d
NULL

Warning: Wrong parameter count for strncmp() in %s on line %d
NULL

Warning: Length must be greater than or equal to 0 in %s on line %d
bool(false)
*** Done ***