Fixing ZipArchive::close(): Can't Open File — Permission Denied in PHP

1. Error Meaning & Causes

PHP cannot create/modify ZIP files because:

For related PHP zip / archive topics, see Fix ZIP Extension Needs to Be Loaded, session_start() failed: Permission denied (13), and "No Space Left on Device (28)".

• Insufficient file/folder permissions
• Wrong ownership (Apache/Nginx has no access)
• SELinux/AppArmor restrictions
• Disk space or inode limits
• Temporary directory misconfiguration

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2. Check and Fix File/Folder Permissions

Find target directory in your code:
$zip = new ZipArchive();
$filename = "/var/www/html/uploads/archive.zip";

Set correct permissions & ownership:
sudo chmod -R 775 /var/www/html/uploads/
sudo chown -R www-data:www-data /var/www/html/uploads/  # Apache
sudo chown -R nginx:nginx /var/www/html/uploads/        # Nginx

3. PHP Configuration (php.ini)

Check and modify php.ini:
php --ini | grep "Loaded Configuration File"
sudo nano /etc/php/8.0/apache2/php.ini

Check these settings:

• disable_functions - Ensure exec/system not disabled
• open_basedir - Ensure ZIP directory is in allowed paths

Restart services:
sudo systemctl restart apache2
sudo systemctl restart nginx php8.0-fpm

4. SELinux/AppArmor Restrictions

Check & fix security modules:
# SELinux
sestatus
sudo chcon -R -t httpd_sys_rw_content_t /var/www/html/uploads/

# AppArmor (Ubuntu/Debian)
sudo aa-status
sudo aa-complain /usr/sbin/php-fpm

5. Disk Space and Inodes

Check space & clear files:
df -h /var
df -i /var
sudo rm -rf /tmp/*

6. Temporary Directory Setup

Set temp directory in php.ini:
sys_temp_dir = "/var/www/html/uploads/tmp"
upload_tmp_dir = "/var/www/html/uploads/tmp"

# Create and set permissions
mkdir -p /var/www/html/uploads/tmp
sudo chmod -R 777 /var/www/html/uploads/tmp

7. Debugging with Error Reporting

Enable debugging in your script:
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

$zip = new ZipArchive();
$file = "/var/www/html/uploads/test.zip";

if ($zip->open($file, ZipArchive::CREATE) !== TRUE) {
    die("Error: Unable to create ZIP file. Check permissions.");
}
$zip->addFromString("test.txt", "Hello World!");
$zip->close();
?>

8. Summary of Fixes