How to use Zip and BZip2 in PHP?

[super soaker]

Hello friends,
I have used many functions in PHP programming language, but still there are many things that I am not aware of. While going through an assignment, I read about the Zip and the BZip2 in that. I was not knowing anything about it. So thought that you guys can explain me.!! So please tell me how to use Zip and BZip2 in PHP? If possible please provide some examples that may be useful for me.!!

[MELTRONICS]

Zip : This extension provides the ability to read and write ZIP compressed archives, and access files and folders therein. The version included in PHP 4 requires the library "ZZIPlib, written by Guido Draheim, version 0.10.6 or higher.

Bzip2 : The bzip2 functions are used to read and write seamlessly bzip2 compressed files (. Bz2). This extension uses the functions "bzip2 library written by Julian Seward. This module requires bzip2/libbzip2 version> = 1.0.x.

[Deabelos]

I have provided you with the Class ZipArchive. The following are the same :

• ZipArchive: addEmptyDir - Adds a new folder to a Zip archive
• ZipArchive:: addFile - Adds a file to a ZIP archive from the given path
• ZipArchive: addFromString - Adds a file to a ZIP archive using its contents
• ZipArchive:: close - Close the active archive
• ZipArchive: deleteIndex - Deletes an entry from the archive using its index
• ZipArchive: deleteName - Deletes an entry in the archive using its name
• ZipArchive: extractTo - Extract the contents of the archive
• ZipArchive: getArchiveComment - Returns the comment of the ZIP archive

[Modifier]

I think that you should also have a knowledge of the functions that are used for the Zip. So I thought that providing you with Zip functions would be helpful. The following are the Zip function :

• zip_close - Close a Zip archive
• zip_entry_close - Closes an archive file
• zip_entry_compressedsize - Get the size of a compressed file archive
• zip_entry_compressionmethod - Gets the compression method used on an archive folder
• zip_entry_open - Open a file archives read
• zip_entry_read - Reads the contents of a file in a folder
• zip_open - Open a ZIP archive
• zip_read - Get the next entry in a ZIP archive

[opaper]

The following is the list of the Bzip2 Functions :

• bzclose - Close a bzip2 file
• bzcompress - Compress a string into bzip2
• bzdecompress - bzip2 Decompress a string
• bzflush - Force a write of all buffered data
• bzopen - Opens a bzip2 compressed file
• bzread - Reading binary file bzip2
• bzwrite - Writing binary file bzip2
• bzerrno - Returns the bzip2 error
• bzerror - Returns the number and bzip2 error in a table

[void]

If you want to create a Zip Archieve, you can use the following example which demonstrates how to create a Zip Archieve :

<?php 

$zip = new ZipArchive (); 
$filename = "./demo.zip" ; 

if ( $zip -> open ( $filename , ZIPARCHIVE :: CREATE )!== TRUE ) { 
exit( "Impossible d'ouvrir < $filename >\n" ); 
} 

$zip -> addFromString ( "demofilephp.txt" . time (), 
$zip -> addFromString ( "demofilephp2.txt" . time (), 
$zip -> addFile ( $thisdir . "/too.php" , "/demofromfile.php" ); 
echo "Name of Files : " . $zip -> numFiles . "\n" ; 
echo "status :" . $zip -> status . "\n" ; 
$zip -> close (); 
?>

[CodGuru]

The following example opens a temporary file and writes a test string, then displays the contents of this file. This is an example of the small bzip2 :

<?php

$filename = "/tmp/demofile.bz2";
$str = "This is a test string.\n";

$bz = bzopen($filename, "w");

bzwrite($bz, $str);

bzclose($bz);

$bz = bzopen($filename, "r");

echo bzread($bz, 10);

echo bzread($bz);

bzclose($bz);

?>