(PHP Extension) Get Compressed ZIP Entry Data as Base64 Using ZipEntry.CopyToBase64

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This example creates a small ZIP archive containing a text file added from memory, writes the ZIP to disk, re-opens it, and then uses ZipEntry.CopyToBase64 to retrieve the compressed data for the text file as a Base64-encoded string.

The Base64 string returned by CopyToBase64 represents the compressed bytes stored for the entry inside the ZIP archive. It is not the original uncompressed text data.

Note: This example requires Chilkat v11.0.0 or greater.

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<?php

include("chilkat.php");

$success = false;

// ------------------------------------------------------------
// First create a sample ZIP archive containing a small text file.

$zip = new CkZip();

$success = $zip->NewZip('c:/temp/sampleText.zip');
if ($success == false) {
    print $zip->lastErrorText() . "\n";
    exit;
}

// Add a small text file from memory.
// The text is stored in the ZIP as "hello.txt".
$success = $zip->AddString('hello.txt','Hello from a ZIP entry!','utf-8');
if ($success == false) {
    print $zip->lastErrorText() . "\n";
    exit;
}

// Write the ZIP archive to disk and close it.
$success = $zip->WriteZipAndClose();
if ($success == false) {
    print $zip->lastErrorText() . "\n";
    exit;
}

// ------------------------------------------------------------
// Now open the ZIP archive we just created.

$zip2 = new CkZip();

$success = $zip2->OpenZip('c:/temp/sampleText.zip');
if ($success == false) {
    print $zip2->lastErrorText() . "\n";
    exit;
}

// Get the text file entry.
$entry = new CkZipEntry();

$success = $zip2->EntryOf('hello.txt',$entry);

if ($success == false) {
    print 'Entry not found.' . "\n";
    exit;
}

// Get the compressed ZIP entry data as Base64.
// 
// This is the compressed data stored inside the ZIP file,
// not the uncompressed text "Hello from a ZIP entry!".
$b64 = $entry->copyToBase64();

print 'Base64 compressed ZIP entry data:' . "\n";
print $b64 . "\n";

$zip2->CloseZip();

print 'Done.' . "\n";

?>