数据库插入不起作用

Question

为什么下面的代码不向数据库表中插入任何内容？

require_once"connection.php"; 
$target_Path='img/displays/'; 
$caption=$_POST['caption']; 
$albums=$_POST['albums']; 
$target_Path = $target_Path.basename($_FILES['photo']['name']); 
move_uploaded_file($_FILES['photo']['tmp_name'], $target_Path); 
$withoutExt = preg_replace("/\\.[^.\\s]{3,4}$/", "", $target_Path); 
mysqli_query($connection,"INSERT INTO `ett`.`gallery` (`id` ,`album`,`name`,`path`)VALUES (`NULL`,`".$albums."`,`".$caption."`,`".$withoutExt."`)");                        

下面的代码工作正常，但由于某些原因上述查询不起作用。问题是什么？

mysqli_query($connection,"INSERT INTO `ett`.`gallery` (`id`, `album`, `name`, `path`) VALUES (NULL, '1', 'test', 'test')"); 

Answer 1

单引号应该围绕字符串值，而不是反引号

mysqli_query($connection,"INSERT INTO `ett`.`gallery` (`id` ,`album`,`name`,`path`)VALUES (NULL,'".$albums."','".$caption."','".$withoutExt."')");