PHP Requires Chilkat v11.0.0+

Find a ZIP Entry by EntryID Using EntryById

See more Zip Examples

This example demonstrates how to use the EntryById method to retrieve a ZIP entry using its unique EntryID.

Each ZipEntry object has an EntryID property that uniquely identifies the entry within the currently open ZIP object.

This is useful when:

• An application stores EntryID values for later use
• ZIP entries need to be retrieved without searching by filename
• Multiple entries may have similar names or paths

The example:

• Opens a ZIP archive
• Retrieves an entry using EntryAt
• Saves the entry's EntryID
• Uses EntryById to retrieve the same entry later

Chilkat2 PHP

<?php

use Chilkat2\Zip;
use Chilkat2\ZipEntry;

// Open an existing ZIP archive.
$zip = new Zip();

try {
    $zip->OpenZip('example.zip');

    // Retrieve the first entry in the ZIP archive.
    $entry = new ZipEntry();

    $zip->EntryAt(0, $entry);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Original entry:\n";
echo '  FileName: ', $entry->FileName, "\n";
echo '  EntryID: ', $entry->EntryID, "\n";
echo "\n";

// Save the EntryID for later use.
$entryId = $entry->EntryID;

// Create another ZipEntry object.
$entry2 = new ZipEntry();

// Retrieve the same entry using EntryById.
try {
    $zip->EntryById($entryId, $entry2);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Entry retrieved by EntryID:\n";
echo '  FileName: ', $entry2->FileName, "\n";
echo '  EntryID: ', $entry2->EntryID, "\n";
echo "\n";

// The filenames and EntryID values should match.
$zip->CloseZip();

echo "Done.\n";