我正在尝试调用一个函数来更新我的 mysqli 数据库,并在发生错误时报告。到目前为止,我的测试文件中有这个:
<?php
$success = test("cat",17);
echo $success;
echo "<br />";
function test($name, $number){
$db = new mysqli("localhost","root","","test");
if($db->connect_errno){
return "Failed to connect to MYSQL Database: [" . $db->connect_errorno . "]" . $db->connect_error;
}
if(!($stmt = $db->prepare("UPDATE `test` SET `name` = ? WHERE `number` = ?"))){
return "prepare failed: [" . $db->errno . "]" . $db->error;
}
if(!($stmt->bind_param('si', $name, $number))){
return "bind failed: [" . $db->errno . "]" . $db->error;
}
if(!($stmt->execute())){
return "execute failed: [" . $db->errno . "]" . $db->error;
}
$stmt->close();
return "Successfully updated database!";
}
?>
并且通过我在那里的测试 (cat, 17) 它返回成功,即使没有数字为 17 的列,并且我看到数据库中没有任何变化。如果在 WHERE 子句中找不到数字,如何让它正确返回失败?