對無法運作的 move_uploaded_file() 函數進行故障排除：逐步指南

move_uploaded_file() Function Not Working: Troubleshooting Guide

Attempting to implement file uploads using the move_uploaded_file() function can prove challenging, especially for novice developers. This article aims to provide a comprehensive guide to addressing the common issue of a non-functioning move_uploaded_file() function.

To begin troubleshooting, enable PHP error reporting:

<code class="php">ini_set('display_errors', 1);
ini_set('log_errors', 1);
error_reporting(E_ALL);</code>

This will output error messages generated by move_uploaded_file(), providing valuable insight into the problem.

Additionally, inspect the value of $_FILES'file':

<code class="php">if ($_FILES['file']['error'] !== UPLOAD_ERR_OK) {
    // Handle error based on error code
}</code>

Possible error codes include:

• UPLOAD_ERR_INI_SIZE: File exceeds server upload limit.
• UPLOAD_ERR_FORM_SIZE: File exceeds HTML form limit.
• UPLOAD_ERR_PARTIAL: File was only partially uploaded.
• UPLOAD_ERR_NO_TMP_DIR: No temporary directory exists.
• UPLOAD_ERR_CANT_WRITE: Unable to save file to disk.

In your specific case, where you mentioned an incorrect filename, it's crucial to remember that files are initially stored in a temporary location on the server. To correctly handle the upload, modify your code to:

<code class="php">move_uploaded_file($_FILES['image']['tmp_name'], __DIR__.'/../../uploads/' . $_FILES['image']['name']);</code>

By implementing these troubleshooting steps, you can effectively resolve the move_uploaded_file() issue and successfully implement file uploads on your website.

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