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--TEST-- Test uasort() function : error conditions --FILE-- <?php /* Prototype : bool uasort(array $array_arg, string $cmp_function) * Description: Sort an array with a user-defined comparison function and maintain index association * Source code: ext/standard/array.c */ echo "*** Testing uasort() : error conditions ***\n"; // comparison function /* Prototype : int cmp(mixed $value1, mixed $value2) * Parameters : $value1 and $value2 - values to be compared * Return value : 0 - if both values are same * 1 - if value1 is greater than value2 * -1 - if value1 is less than value2 * Description : compares value1 and value2 */ function cmp($value1, $value2) { if($value1 == $value2) { return 0; } else if($value1 > $value2) { return 1; } else { return -1; } } // Initialize 'array_arg' $array_arg = array(0 => 1, 1 => 10, 2 => 'string', 3 => 3, 4 => 2, 5 => 100, 6 => 25); // With zero arguments echo "-- Testing uasort() function with Zero argument --\n"; var_dump( uasort() ); // With one more than the expected number of arguments echo "-- Testing uasort() function with more than expected no. of arguments --\n"; $extra_arg = 10; var_dump( uasort($array_arg, 'cmp', $extra_arg) ); // With one less than the expected number of arguments echo "-- Testing uasort() function with less than expected no. of arguments --\n"; var_dump( uasort($array_arg) ); // With non existent comparison function echo "-- Testing uasort() function with non-existent compare function --\n"; var_dump( uasort($array_arg, 'non_existent') ); // With non existent comparison function and extra argument echo "-- Testing uasort() function with non-existent compare function and extra argument --\n"; var_dump( uasort($array_arg, 'non_existent', $extra_arg) ); echo "Done" ?> --EXPECTF-- *** Testing uasort() : error conditions *** -- Testing uasort() function with Zero argument -- Warning: uasort() expects exactly 2 parameters, 0 given in %s on line %d NULL -- Testing uasort() function with more than expected no. of arguments -- Warning: uasort() expects exactly 2 parameters, 3 given in %s on line %d NULL -- Testing uasort() function with less than expected no. of arguments -- Warning: uasort() expects exactly 2 parameters, 1 given in %s on line %d NULL -- Testing uasort() function with non-existent compare function -- Warning: uasort() expects parameter 2 to be a valid callback, function 'non_existent' not found or invalid function name in %s on line %d NULL -- Testing uasort() function with non-existent compare function and extra argument -- Warning: uasort() expects exactly 2 parameters, 3 given in %s on line %d NULL Done