PHP Zip

ZIP Operations Overview

🔹 Creating a ZIP Archive

Create a new ZIP file and add files to it using the ZipArchive class. This is useful for bundling multiple files for download or backup purposes.

<?php
$zip = new ZipArchive();
$zipFile = 'myfiles.zip';

// Create new ZIP file
if ($zip->open($zipFile, ZipArchive::CREATE) === TRUE) {
    // Add files to ZIP
    $zip->addFile('document.txt', 'document.txt');
    $zip->addFile('image.jpg', 'images/image.jpg');
    
    // Add string content as file
    $zip->addFromString('readme.txt', 'This is a readme file');
    
    $zip->close();
    echo "ZIP archive created successfully!";
} else {
    echo "Failed to create ZIP archive";
}
?>

🔹 Extracting ZIP Archives

Extract all files from a ZIP archive to a specified directory. You can extract the entire archive or specific files based on your needs.

<?php
$zip = new ZipArchive();
$zipFile = 'myfiles.zip';

// Open ZIP file
if ($zip->open($zipFile) === TRUE) {
    // Extract to directory
    $zip->extractTo('extracted_files/');
    $zip->close();
    echo "Files extracted successfully!";
} else {
    echo "Failed to open ZIP archive";
}

// Extract specific file
$zip2 = new ZipArchive();
if ($zip2->open($zipFile) === TRUE) {
    $zip2->extractTo('specific/', 'document.txt');
    $zip2->close();
    echo "<br>Specific file extracted!";
}
?>

🔹 Listing ZIP Contents

Read and display information about files inside a ZIP archive without extracting them. This helps you inspect archive contents before extraction.

<?php
$zip = new ZipArchive();
$zipFile = 'myfiles.zip';

if ($zip->open($zipFile) === TRUE) {
    echo "Number of files: " . $zip->numFiles . "<br><br>";
    
    // List all files
    for ($i = 0; $i < $zip->numFiles; $i++) {
        $filename = $zip->getNameIndex($i);
        $fileinfo = $zip->statIndex($i);
        
        echo "File: " . $filename;
        echo " (Size: " . $fileinfo['size'] . " bytes)<br>";
    }
    
    $zip->close();
} else {
    echo "Failed to open ZIP archive";
}
?>

🔹 Adding Multiple Files

Add multiple files to a ZIP archive using loops or by scanning directories. This is efficient for backing up entire folders or creating bulk downloads.

<?php
$zip = new ZipArchive();
$zipFile = 'backup.zip';

if ($zip->open($zipFile, ZipArchive::CREATE) === TRUE) {
    // Array of files to add
    $files = ['file1.txt', 'file2.txt', 'file3.txt'];
    
    foreach ($files as $file) {
        if (file_exists($file)) {
            $zip->addFile($file, basename($file));
        }
    }
    
    // Add entire directory
    $dir = 'documents/';
    if (is_dir($dir)) {
        $files = scandir($dir);
        foreach ($files as $file) {
            if ($file != '.' && $file != '..') {
                $zip->addFile($dir . $file, 'docs/' . $file);
            }
        }
    }
    
    $zip->close();
    echo "Multiple files added to ZIP!";
}
?>

🔹 Deleting Files from ZIP

Remove specific files from an existing ZIP archive without recreating the entire archive. This is useful for updating archives by removing outdated files.

<?php
$zip = new ZipArchive();
$zipFile = 'myfiles.zip';

if ($zip->open($zipFile) === TRUE) {
    // Delete a file by name
    if ($zip->deleteName('readme.txt')) {
        echo "File deleted from ZIP!<br>";
    }
    
    // Delete by index
    if ($zip->deleteIndex(0)) {
        echo "First file deleted!<br>";
    }
    
    $zip->close();
    echo "ZIP archive updated!";
} else {
    echo "Failed to open ZIP archive";
}
?>

🔹 Reading File Contents

Read the contents of files inside a ZIP archive without extracting them to disk. This is memory-efficient for processing archived data directly.

<?php
$zip = new ZipArchive();
$zipFile = 'myfiles.zip';

if ($zip->open($zipFile) === TRUE) {
    // Read file content by name
    $content = $zip->getFromName('readme.txt');
    echo "Content: " . $content . "<br><br>";
    
    // Read file by index
    $content2 = $zip->getFromIndex(0);
    echo "First file content: " . substr($content2, 0, 50) . "...";
    
    $zip->close();
} else {
    echo "Failed to open ZIP archive";
}
?>

🔹 Checking ZIP Status

Verify if a ZIP file exists and check for errors during operations. Proper error handling ensures your application handles archive operations gracefully.

<?php
$zip = new ZipArchive();
$zipFile = 'test.zip';

// Check if file exists
if (file_exists($zipFile)) {
    echo "ZIP file exists!<br>";
} else {
    echo "ZIP file not found!<br>";
}

// Try to open and check status
$status = $zip->open($zipFile);
if ($status === TRUE) {
    echo "ZIP opened successfully!<br>";
    echo "Number of files: " . $zip->numFiles;
    $zip->close();
} else {
    echo "Error opening ZIP. Error code: " . $status;
}
?>