Title: Problem installing/updating themes/plugins Last modified: August 20, 2016 --- # Problem installing/updating themes/plugins * [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/) * I try to install new plugins (doesn’t matter which one) to any WP website on the server from WP admin, and I receive the error: * Installing Plugin: Empty Tags Remover 1.0 Downloading install package from [http://downloads.wordpress.org/plugin/empty-tags-remover.zip…](http://downloads.wordpress.org/plugin/empty-tags-remover.zip…) Unpacking the package… * Installing the plugin… Warning: array_keys() expects parameter 1 to be array, boolean given in …/wp-admin/includes/class-wp-upgrader.php on line 189 The package could not be installed. The plugin contains no files. Plugin install failed.Down * WP is able to download the zip folder into to the …/wp-content/upgrade folder, but then cannot proceed to install it. * Could it be a WP issue or incompatibility with PHP or MySQL? * WordPress version 3.3.1 PHP version 5.3.10 MySQL version 5.1.61 Viewing 11 replies - 1 through 11 (of 11 total) * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667704) * What happens if you upload these plugins manually? * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667710) * I can activate manually uploaded plugins. * But I like to fix this, because when a new WP version arrives I am unable to run the update for the database. * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667715) * Try re-uploading the wp-admin and wp-includes folders from a **fresh** download of WordPress. * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667726) * I did this already, before posting this thread. * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667732) * Can you see the zip files in the wp-contents/upload folder? If so, can you check that they do have some real content inside? * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667739) * Yes. * i.e. the Empty Tags Remover folder carries the same files, as when I download the plugin from the WP site: empty-tags-remover.php and readme.txt. * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667762) * Could it be that WordPress 3.3.1 is not ready for PHP 5.3.10 or MySQL 5.1.61? * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667781) * No – that’s not the problem but it could be a server issue. PHP may be missing ZipArchive. * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 2 months ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667869) * Indeed, it looks like a PHP issue. Where can a find a complete list of PHP modules recommended and required by WP? * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 1 month ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667955) * I installed ZipArchive, still can’t install/upgrade plugins from WP admin. In which table/field do I find the login credentials for FTP/SFTP? Maybe we have changed this, and WP does not get the proper access? * Thread Starter [Old Cow](https://wordpress.org/support/users/old-cow/) * (@old-cow) * [14 years, 1 month ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667958) * When I include FTP/SSH constants into the wp-config.php * define(‘FS_METHOD’, ‘ftpext’); define(‘FTP_BASE’, ‘/path/to/wordpress/’); define(‘ FTP_CONTENT_DIR’, ‘/path/to/wordpress/wp-content/’); define(‘FTP_PLUGIN_DIR ‘,‘/ path/to/wordpress/wp-content/plugins/’); define(‘FTP_USER’, ‘username’); define(‘ FTP_PASS’, ‘password’); define(‘FTP_HOST’, ‘ftp.example.org:21’); * I am able to install and delete plugins from WP admin now. * When I install a new plugin, I get stuck with the message: Installing Plugin: plugin-name Downloading install package from [http://downloads.wordpress.org/plugin/plugin-name.zip…](http://downloads.wordpress.org/plugin/plugin-name.zip…) * I can go to Plugins and activate them, but something??? still prohibits finalizing the install. Any idea? * Do you know where I have to make changes on the server to avoid these constants on all sites? Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘Problem installing/updating themes/plugins’ is closed to new replies. ## Tags * [apache](https://wordpress.org/support/topic-tag/apache/) * [ftp](https://wordpress.org/support/topic-tag/ftp/) * [php](https://wordpress.org/support/topic-tag/php/) * [server](https://wordpress.org/support/topic-tag/server/) * [ssh](https://wordpress.org/support/topic-tag/ssh/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 11 replies * 2 participants * Last reply from: [Old Cow](https://wordpress.org/support/users/old-cow/) * Last activity: [14 years, 1 month ago](https://wordpress.org/support/topic/problem-installingupdating-themesplugins/#post-2667958) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics