--TEST-- mysqli_stmt_bind_param() - checking whether the parameters are modified (bug#44390) --EXTENSIONS-- mysqli --SKIPIF-- --FILE-- set_charset('latin1'); class foo { // @var $bar string public $bar; } $foo = new foo; $foo->bar = "фубар"; echo "Test 1:\n"; $stmt = $link->prepare("SELECT ? FOO"); var_dump($foo); // here you can see the bar member var being a string $stmt->bind_param("s", $foo->bar); var_dump($foo); // this will show $foo->bar being a reference string $stmt->bind_result($one); $stmt->execute(); $stmt->fetch(); $stmt->free_result(); echo("$one\n\n"); // it is getting worse. Binding the same var twice with different // types you can get unexpected results e.g. binary trash for the // string and misc data for the integer. See next 2 tests. echo "Test 2:\n"; $stmt = $link->prepare("SELECT ? FOO, ? BAR"); var_dump($foo); $stmt->bind_param("si", $foo->bar, $foo->bar); echo "---\n"; var_dump($foo); echo "---\n"; $stmt->execute(); var_dump($foo); echo "---\n"; $stmt->bind_result($one, $two); $stmt->fetch(); $stmt->free_result(); echo("$one - $two\n\n"); echo "Test 3:\n"; $stmt = $link->prepare("SELECT ? FOO, ? BAR"); var_dump($foo); $stmt->bind_param("is", $foo->bar, $foo->bar); var_dump($foo); $stmt->bind_result($one, $two); $stmt->execute(); $stmt->fetch(); $stmt->free_result(); echo("$one - $two\n\n"); echo "done!"; ?> --CLEAN-- --EXPECTF-- Test 1: object(foo)#%d (1) { ["bar"]=> string(%d) "фубар" } object(foo)#%d (1) { ["bar"]=> &string(%d) "фубар" } фубар Test 2: object(foo)#%d (1) { ["bar"]=> string(%d) "фубар" } --- object(foo)#%d (1) { ["bar"]=> &string(%d) "фубар" } --- object(foo)#%d (1) { ["bar"]=> &string(%d) "фубар" } --- фубар - 0 Test 3: object(foo)#%d (1) { ["bar"]=> string(%d) "фубар" } object(foo)#%d (1) { ["bar"]=> &string(%d) "фубар" } 0 - фубар done!