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| Zip Encoding Class | |
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| <h1>Zip Encoding Class</h1> | |
| <p>Code Igniter's Zip Encoding Class classes permit you to create Zip archives. Archives can be downloaded to your | |
| desktop or saved to a directory.</p> | |
| <h2>Initializing the Class</h2> | |
| <p>Like most other classes in Code Igniter, the Zip class is initialized in your controller using the <dfn>$this->load->library</dfn> function:</p> | |
| <code>$this->load->library('zip');</code> | |
| <p>Once loaded, the Zip library object will be available using: <dfn>$this->zip</dfn></p> | |
| <h2>Usage Example</h2> | |
| <p>This example demonstrates how to compress a file, save it to a folder on your server, and download it to your desktop.</p> | |
| <code> | |
| $name = 'mydata1.txt';<br /> | |
| $data = 'A Data String!';<br /> | |
| <br /> | |
| $this->zip->add_data($name, $data);<br /> | |
| <br /> | |
| // Write the zip file to a folder on your server. Name it "my_backup.zip"<br /> | |
| $this->zip->archive('/path/to/directory/my_backup.zip'); | |
| <br /><br /> | |
| // Download the file to your desktop. Name it "my_backup.zip"<br /> | |
| $this->zip->download('my_backup.zip'); | |
| </code> | |
| <h1>Function Reference</h1> | |
| <h2>$this->zip->add_data()</h2> | |
| <p>Permits you to add data to the Zip archive. The first parameter must contain the name you would like | |
| given to the file, the second parameter must contain the file data:</p> | |
| <code> | |
| $name = 'my_bio.txt';<br /> | |
| $data = 'I was born in an elevator...';<br /> | |
| <br /> | |
| $this->zip->add_data($name, $data); | |
| </code> | |
| <p>If you would like to compress a file that exists somewhere on your server you will need to read the data before | |
| passing it to the function:</p> | |
| <code> | |
| $name = 'photo.jpg';<br /><br /> | |
| $data = file_get_contents("/path/to/photo.jpg"); // Read the file's contents<br /> | |
| <br /> | |
| $this->zip->add_data($name, $data); | |
| </code> | |
| <p>You are allowed to have multiple calls to this function in order to | |
| add several files to your archive. Example:</p> | |
| <code> | |
| $name = 'mydata1.txt';<br /> | |
| $data = 'A Data String!';<br /> | |
| $this->zip->add_data($name, $data);<br /> | |
| <br /> | |
| $name = 'mydata2.txt';<br /> | |
| $data = 'Another Data String!';<br /> | |
| $this->zip->add_data($name, $data);<br /> | |
| </code> | |
| <p>Or you can pass multiple files using an array:</p> | |
| <code> | |
| $data = array(<br /> | |
| 'mydata1.txt' => 'A Data String!',<br /> | |
| 'mydata2.txt' => 'Another Data String!',<br /> | |
| 'photo.jpg' => file_get_contents("/path/to/photo.jpg")<br /> | |
| );<br /> | |
| <br /> | |
| $this->zip->add_data($data);<br /> | |
| <br /> | |
| $this->zip->download('my_backup.zip'); | |
| </code> | |
| <p>If you would like your compressed data organized into sub-folders, include the path as part of the filename:</p> | |
| <code> | |
| $name = '<kbd>personal/</kbd>my_bio.txt';<br /> | |
| $data = 'I was born in an elevator...';<br /> | |
| <br /> | |
| $this->zip->add_data($name, $data); | |
| </code> | |
| <p>The above example will place <dfn>my_bio.txt</dfn> inside a folder called <kbd>personal</kbd>.</p> | |
| <h2>$this->zip->add_dir()</h2> | |
| <p>Permits you to add a directory. Usually this function is unnecessary since you can place your data into folders when | |
| using <dfn>$this->zip->add_data()</dfn>, but if you would like to create an empty folder you can do so. Example:</p> | |
| <code>$this->zip->add_dir('myfolder'); // Creates a folder called "myfolder"</code> | |
| <h2>$this->zip->archive()</h2> | |
| <p>Writes the Zip-encoded file to a directory on your server. Submit a valid server path ending in the file name. Make sure the | |
| directory is writable (666 or 777 is usually OK). Example:</p> | |
| <code>$this->zip->archive('/path/to/folder/myarchive.zip'); // Creates a file named myarchive.zip</code> | |
| <h2>$this->zip->download()</h2> | |
| <p>Causes the Zip file to be downloaded to your server. The function must be passed the name you would like the zip file called. | |
| Example:</p> | |
| <code>$this->zip->download('latest_stuff.zip'); // File will be named "latest_stuff.zip"</code> | |
| <p class="important"><strong>Note:</strong> Do not display any data in the controller in which you call this function since it sends various server headers | |
| that cause the download to happen and the file to be treated as binary.</p> | |
| <h2>$this->zip->get_zip()</h2> | |
| <p>Returns the Zip-compressed file data. Generally you will not need this function unless you want to do something unique with the data. | |
| Example:</p> | |
| <code> | |
| $name = 'my_bio.txt';<br /> | |
| $data = 'I was born in an elevator...';<br /> | |
| <br /> | |
| $this->zip->add_data($name, $data);<br /><br /> | |
| $zip_file = $this->zip->get_zip(); | |
| </code> | |
| <h2>$this->zip->clear_data()</h2> | |
| <p>The Zip class caches your zip data so that it doesn't need to recompile the Zip archive for each function you use above. | |
| If, however, you need to create multiple Zips, each with different data, you can clear the cache between calls. Example:</p> | |
| <code> | |
| $name = 'my_bio.txt';<br /> | |
| $data = 'I was born in an elevator...';<br /> | |
| <br /> | |
| $this->zip->add_data($name, $data);<br /> | |
| $zip_file = $this->zip->get_zip();<br /> | |
| <br /> | |
| <kbd>$this->zip->clear_data();</kbd> | |
| <br /><br /> | |
| $name = 'photo.jpg';<br /> | |
| $data = file_get_contents("/path/to/photo.jpg"); // Read the file's contents<br /> | |
| $this->zip->add_data($name, $data); | |
| <br /><br /> | |
| $this->zip->download('myphotos.zip'); | |
| </code> | |
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