PHP MySQLi 在插入时将文件重命名为行 ID

Question

各位程序员们好，

如何在插入 SQL 时将文件重命名为行 ID？

让我举个例子：

<?php

// File Properties
$file_name = $file['name'];
$file_tmp = $file['tmp_name'];

// File extension
$file_ext = explode('.', $file_name);
$file_ext = strtolower(end($file_ext));

// File destination
$file_rename = 'ROW ID' . $file_ext; // THIS IS WHERE THE ROW ID ARE NEEDED
$file_destination = 'uploads/' . $file_rename;

if(move_uploaded_file($file_tmp, $file_destination)) {
    $connect = mysqli_connect('localhost', 'root', '', 'database');
    $query = "INSERT INTO images (image_id, image_url) VALUES ('', '$file_destination')"; // THIS IS THE INSERT WHERE I NEED THE ROW ID
    $result = mysqli_query($connect, $query);
}

?>

感谢所有输入。

Answer 1

下面给出了几种处理这种情况的方法..

1. 首先你需要在 mysql 中找到下一个自动增量值来获取当前图像行 id
2. 将文件移动到服务器上具有表行 ID 的所需位置
3. 在 mysql 中插入记录以将 $file_destination 存储在 mysql 中。

如下...

<?php

// File Properties
$file_name = $file['name'];
$file_tmp = $file['tmp_name'];

// File extension
$file_ext = explode('.', $file_name);
$file_ext = strtolower(end($file_ext));

//Perform mysql 
$connect = mysqli_connect('localhost', 'root', '', 'database');
$query = "SELECT AUTO_INCREMENT FROM information_schema.tables WHERE table_name = 'images' AND table_schema = DATABASE( )"; // THIS IS WHERE YOU GET NEXT INCREMENTAL ROW ID VALUE
$next_insert_id = mysqli_query($connect, $query);

// File destination
$file_rename = $next_insert_id . $file_ext; // THIS IS WHERE THE ROW ID ARE NEEDED
$file_destination = 'uploads/' . $file_rename;

if(move_uploaded_file($file_tmp, $file_destination)) {
    //Do update for that record in the database
    $query = "INSERT INTO images (image_url) VALUES ('$file_destination')"; // THIS IS THE UPDATE
    $result = mysqli_query($connect, $query);
}

?>

或

1. 首先你需要在没有行ID的情况下执行mysql插入。
2. 使用 mysqli_insert_id() 获取最后插入 id 以获取 mysql 行 id。
3. 将文件移动到服务器上具有表行 ID 的所需位置。
4. 更新 mysql 中最后插入的记录以将 $file_destination 存储在 mysql 中。

如下...

<?php

// File Properties
$file_name = $file['name'];
$file_tmp = $file['tmp_name'];

// File extension
$file_ext = explode('.', $file_name);
$file_ext = strtolower(end($file_ext));

//Perform mysql 
$connect = mysqli_connect('localhost', 'root', '', 'database');
$query = "INSERT INTO images (image_url) VALUES ('')"; // THIS IS THE INSERT WHERE I NEED THE ROW ID
$result = mysqli_query($connect, $query);
$last_insert_id = mysqli_insert_id();

// File destination
$file_rename = $last_insert_id . $file_ext; // THIS IS WHERE THE ROW ID ARE NEEDED
$file_destination = 'uploads/' . $file_rename;

if(move_uploaded_file($file_tmp, $file_destination)) {
    //Do update for that record in the database
    $query = "UPDATE images SET (image_url) VALUES ($file_destination) WHERE image_id = $last_insert_id"; // THIS IS THE UPDATE
    $result = mysqli_query($connect, $query);
}

?>