I have a WordPress installation and some plugins installed and activated. But I have lost the original plugins .zip files. I would like to install some of the plugins into a new WordPress.
I do not want to migrate/move/backup-restore the whole current WP installation. I just want to re-create the original plugin .zip files for some of the plugins that are installed. I do have access to the whole file tree as well as the database. Is there any method for doing that?
Yes, first add a download link to the plugin action links:
/**
* Add action links to each plugin
* @author brasofilo
*/
add_filter( 'plugin_action_links', function ( $plugin_meta, $plugin_file, $plugin_data, $status )
{
$plugin_dir = dirname( $plugin_file );
if( !empty( $plugin_dir ) && '.' !== $plugin_dir )
$plugin_meta[] = sprintf(
"<a href='#' class='down-zip down-icon' data-file='%s' title='%s'></a>",
$plugin_dir,
'Download zip file for ' . $plugin_data['Name']
);
else
$plugin_meta[] = "Root plugin, cannot zip";
return $plugin_meta;
}, 10, 4 );
Then style and attach JS actions:
/**
* Style and actions for wp-admin/plugins.php
* @author brasofilo
*/
add_action( 'admin_footer-plugins.php', function() {
?>
<style>
.down-icon:before { /* http://melchoyce.github.io/dashicons/ */
content: "\f316";
display: inline-block;
-webkit-font-smoothing: antialiased;
font: normal 20px/1 'dashicons';
vertical-align: top;
}
</style>
<script>
root_wp = '<?php echo WP_PLUGIN_DIR; ?>' + '/';
/**
* Virtual $_POST
* creates form, appends and submits
*
* @author https://stackoverflow.com/a/9815335/1287812
*/
function b5f_submit_form_post( path, params, method )
{
$ = jQuery;
method = method || "post"; // Set method to post by default, if not specified.
var form = $(document.createElement( "form" ))
.attr( {"method": method, "action": path} );
$.each( params, function(key,value)
{
$.each( value instanceof Array? value : [value], function(i,val)
{
$(document.createElement("input"))
.attr({ "type": "hidden", "name": key, "value": val })
.appendTo( form );
});
});
form.appendTo( document.body ).submit();
}
jQuery(document).ready(function($)
{
/**
* Fire a plugin download
*/
$("a.down-zip").click(function()
{
event.preventDefault();
b5f_submit_form_post( '', {
action: 'zip_a_plugin',
plugin_to_zip: root_wp + $(this).data('file'),
plugin_name: $(this).data('file')
});
});
});
</script>
<?php
});
Capture the custom $_POSTed data and process the plugin directory to zip:
/**
* Dispatch $_POST['action']=>'zip_a_plugin' custom action
* @author brasofilo https://stackoverflow.com/a/23546276/1287812
*/
add_action('admin_action_zip_a_plugin', function()
{
if( empty( $_REQUEST['plugin_to_zip'] ) )
return;
zipFile( $_REQUEST['plugin_to_zip'], $_REQUEST['plugin_name'], false );
});
And finally, using a zipping function found here on the Stack
/**
* Makes zip from folder
* @author https://stackoverflow.com/a/17585672/1287812
*/
function zipFile($source, $destination, $flag = '')
{
if ( !extension_loaded('zip') ) {
return false;
}
$zip = new ZipArchive();
$tmp_file = tempnam(WP_CONTENT_DIR,'');
if (!$zip->open($tmp_file, ZIPARCHIVE::CREATE)) {
return false;
}
$source = str_replace('\\', '/', realpath($source));
if($flag)
{
$flag = basename($source) . '/';
//$zip->addEmptyDir(basename($source) . '/');
}
if (is_dir($source) === true)
{
$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);
foreach ($files as $file)
{
$file = str_replace('\\', '/', realpath($file));
if (is_dir($file) === true)
{
$src = str_replace($source . '/', '', $flag.$file . '/');
if( WP_PLUGIN_DIR.'/' !== $src ) # Workaround, as it was creating a strange empty folder like /www_dev/dev.plugins/wp-content/plugins/
$zip->addEmptyDir( $src );
}
else if (is_file($file) === true)
{
$src = str_replace($source . '/', '', $flag.$file);
$zip->addFromString( $src, file_get_contents($file));
}
}
}
else if (is_file($source) === true)
{
$zip->addFromString($flag.basename($source), file_get_contents($source));
}
$tt = $zip->close();
if(file_exists($tmp_file))
{
// push to download the zip
header('Content-type: application/zip');
header('Content-Disposition: attachment; filename="'.$destination.'"');
readfile($tmp_file);
// remove zip file is exists in temp path
exit();
}
else {
echo $tt;
die();
}
}
Funnily enough, it's actually trivial to create a zip file from an existing plugin.
Simply create a zip file containing the plugin folder. The unix commands to do that are:
$ cd wp-content/plugins
$ zip -r my-plugin.zip my-plugin
You can then download the resulting my-plugin.zip file which can then be used in WordPress plugin install via upload on new sites (ie: WP Admin -> Plugins -> Add New -> Upload).
Obviously the zip file won't contain any database tables/mods, but most plugins test for this on install and perform any needed database upgrades at install time. Unfortunately there's no way to know whether this will be a problem without testing or checking the plugin source code, or both.
The easiest, code-less way is with another plugin, such as WordPress Downloader.
