Why is my $_FILES array empty when uploading files in PHP?

Troubleshooting Empty $_FILES Array in PHP File Uploads

When attempting to upload files using PHP, an empty $_FILES array can be a frustrating issue. To resolve this, follow these extensive troubleshooting steps:

Php.ini Configuration

• Ensure that file_uploads is set to On
• Verify that post_max_size and upload_max_filesize are set to values large enough to accommodate your uploads

Form Attribute Checks

• Validate that your
  tag includes the enctype="multipart/form-data" attribute
• Avoid using multiple input fields with the same name attribute
• Assign a NAME attribute to your file input field

Directory Permissions

• Grant read and write permissions to your temporary upload directory (specified in upload_tmp_dir in php.ini)
• Ensure that your file destination and tmp directories do not contain spaces

Other Checks

• Close all tags with
• Submit your form using the POST method (GET does not support multipart file uploads)
• Avoid disabling file input fields with JavaScript
• Eliminate nested
  tags
• Check for invalid or overlapping HTML tags
• Avoid non-alphanumeric characters in file names
• Verify sufficient disk space
• Avoid using underscores in the name=" attribute of the tag

Additional Considerations

• Check your PHP settings within .htaccess to rule out potential conflicts
• Try uploading smaller files to isolate file size as a factor
• If using AJAX POST requests, ensure that they are not the cause of the empty $_FILES array

Remember to thoroughly review each step and eliminate potential causes to resolve the issue of an empty $_FILES array in PHP file uploads.

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