PHP Zip Files

The PHP Zip files functions are used to store a bunch of files or directories together in the compressed. The Zip is the archive file format that is used to store the files in compressed form. The Zip archive conveniently stores many files or directories together in compressed form for storing and sharing them. The PHP Zip files are not built-in functions in PHP, as other built-in functions are available in PHP, so we need to install the class if it is not present; if we are using PHP 5 or another newer version, then the extensions required are free to download and install. The Zip extension requires libzip.

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To work with the Zip files, we need to perform the installation as follows –

Linux users (PHP 5+):

• Linux users must download and include the PHP Zip functions and library as they are not built in by default.
• Ensure that libzip version 0.11 or later is installed, with a recommended version of 0.11.2 or later.
• During PHP compilation, use the configuration option –with-libzip=DIR to include Zip support.
• To enable the Zip function, PHP must be compiled with the –enable-zip flag.

Windows users (PHP 5+):

• Similar to Linux, the PHP Zip functions and library are not built in by default for Windows users.
• Download and enable the php_zip.dll file, which is located inside the php.ini configuration file, to utilize the Zip functions.
• Note that in PHP 5.3, this extension is already built in, so no additional steps are necessary.

Functions

While working with Zip files, we need to use some of the functions mentioned below –

• zip_open(): Opens a ZIP file archive for reading.
• zip_read(): Reads the next file in an open ZIP file archive.
• zip_entry_open(): Opens a directory entry in the ZIP file for reading.
• zip_entry_read(): Reads from an open directory entry in the ZIP file.
• zip_entry_compressedsize(): Retrieves the compressed file size of a ZIP directory entry.
• zip_entry_compressionmethod(): Retrieves the compression method of a ZIP directory entry.
• zip_entry_filesize(): Retrieves the actual size of the file of a ZIP directory entry.
• zip_entry_name(): Retrieves the name of a ZIP directory entry.
• zip_close(): Closes the ZIP file archive.
• zip_entry_close(): Closes the ZIP directory entry.

Examples of PHP XML into Array

Example of PHP Zip files to create the Zip file-

Next, we write the PHP code to understand the PHP Zip files more clearly with the following example, where the Zip file is used to store the bunch of files and directories together in the compressed form, as below –

Example #1

First, we will create the folder and then create the files or directory which we want to bundle and Zip them; then we use the PHP code to Zip them.

Code:

 open( $zipfile, ZipArchive::CREATE ) === TRUE ) { // open the directory at the gien path into the variable $dir = opendir( $dir_path ); while( $file = readdir( $dir )) { if( is_file( $dir_path.$file )) { $zip_obj -> addFile( $dir_path.$file, $file ); } } $zip_obj ->close(); } ?>

Output:

As in the above code, it is having the directory path(from where all the files are to Zip) and the file name(by what name the zip file is to be create). First, the ZipArchive class object is created by using this code “$zip_obj = new ZipArchive;” then iterate all the files available in that directory path and then by using ZipArchive object, the files are added to the Zip archive by using this code “$zip_obj -> addFile( $dir_path.$file, $file );.”

Example #2

Example of PHP Zip files to Unzip the Zip file-

Next, we write the PHP code to understand the PHP Zip files, where the Zip file is unzipped to extract all the zipped files or directory here, as below –

Code:

open( $file ); // Extract all the Zip files to the current directory $zip_obj->extractTo('./'); $zip_obj->close(); ?>

Output:

As in the above code, it has the directory path and the file name(which file is to unzip). First, the ZipArchive class object is created by using this code “$zip_obj = new ZipArchive;” Then, by using ZipArchive object, the file is open from that path, and then extract all the files which were added to the Zip archive by using this code “$zip_obj -> extractTo(‘./’);”.

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