Title: Unable activate plugin Last modified: August 31, 2016 --- # Unable activate plugin * Resolved [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/) * I’m unable to activate plugin. I receive following error: * Parse error: syntax error, unexpected T_FUNCTION in cronjob-scheduler/cronjob- scheduler.php on line 411 * I have PHP 5.2.17, if this help. On my pc this plugin is awesome, but here I have PHP 5.6. I think I have to convert this code to PHP5.2 compatibility: * ``` public function get_schedules () { $schedules = wp_get_schedules(); uasort($schedules, function ($a, $b) { // if schedules are the same return 0 if($a['interval'] == $b['interval']) return 0; // return comparison int return $a['interval'] < $b['interval'] ? -1 : 1; }); return $schedules; } ``` * Please help Viewing 14 replies - 1 through 14 (of 14 total) * [jfan2006](https://wordpress.org/support/users/jfan2006/) * (@jfan2006) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221173) * I have the same error: * Plugin could not be activated because it triggered a fatal error. * Parse error: syntax error, unexpected ‘[‘ in …/wp-content/plugins/cronjob-scheduler/ cronjob-scheduler.php on line 700 * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221178) * Hi [@jfan2006](https://wordpress.org/support/users/jfan2006/) – please try downloading the latest version (1.17) that I have just released to fix this issue. * [@vladurash](https://wordpress.org/support/users/vladurash/) – thanks for the report. I cannot see why you are getting this error but I will look into it and see what I can find. * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221182) * [@vladurash](https://wordpress.org/support/users/vladurash/) I have deployed version 1.18 which should fix your activation issue – it was because PHP 5.2.17 doesn’t support anonymous functions within uasort. * Please let me know how you get on! * Chris. * Thread Starter [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221184) * [@chrispage1](https://wordpress.org/support/users/chrispage1/) activation is ok. * But now I can’t see anything in Settings>Cronjob Scheduler. No info about wp- config or anything else. Please check * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221207) * [@vladurash](https://wordpress.org/support/users/vladurash/) – would you be able to get a screenshot of the whole section for me please? * Thanks, Chris. * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221209) * [@vladurash](https://wordpress.org/support/users/vladurash/) sorry about that. It seems version 1.18 refactoring introduced a bug which has since been resolved in version 1.19 – please download and update and let me know how you get on. * Chris. * Thread Starter [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221210) * I made some test playing with PHP versions on my test website (dev, not prod). So, on PHP ver 5.2.17, my dashboard looks like this: [https://onedrive.live.com/redir?resid=15AD985AD8F96418!100735&authkey=!AM_sjTawQ21Bj2I&v=3&ithint=photo%2cpng](https://onedrive.live.com/redir?resid=15AD985AD8F96418!100735&authkey=!AM_sjTawQ21Bj2I&v=3&ithint=photo%2cpng) * Using higer version for PHP (eg 5.3), it works ([https://onedrive.live.com/redir?resid=15AD985AD8F96418!100736&authkey=!ABtHcdRutjWGcfg&v=3&ithint=photo%2cpng](https://onedrive.live.com/redir?resid=15AD985AD8F96418!100736&authkey=!ABtHcdRutjWGcfg&v=3&ithint=photo%2cpng)) * Unfortunatelly, on prod website I don’t have access to cPanel to change PHP version( owner won’t make this change). * Thread Starter [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221211) * I have also updated plugin to version 1.19 as you instructed. No changes for PHP ver 5.2.17 * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221213) * Please can you enable WordPress WP_DEBUG ([https://codex.wordpress.org/WP_DEBUG](https://codex.wordpress.org/WP_DEBUG)) * Also, is there anything in your error_log files? * Unfortunately I am unable to replicate the issue at the minute so need all the information I can get. * Thread Starter [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221214) * I don’t have any error_log on server. * With DEBUB enabled I have following lines in Setting>Cronjob Scheduler * `Notice: date_default_timezone_set() [function.date-default-timezone-set]: Timezone ID ” is invalid in /home/serpante/public_html/wp-content/plugins/cronjob-scheduler/ cronjob-scheduler.php on line 15 * Notice: Use of undefined constant __DIR__ – assumed ‘__DIR__’ in /home/serpante/ public_html/wp-content/plugins/cronjob-scheduler/cronjob-scheduler.php on line 328 * Notice: Use of undefined constant __DIR__ – assumed ‘__DIR__’ in /home/serpante/ public_html/wp-content/plugins/cronjob-scheduler/cronjob-scheduler.php on line 181 * Notice: Use of undefined constant __DIR__ – assumed ‘__DIR__’ in /home/serpante/ public_html/wp-content/plugins/cronjob-scheduler/cronjob-scheduler.php on line 188 * Warning: require_once(__DIR__/views/admin_page.php) [function.require-once]: failed to open stream: No such file or directory in /home/serpante/public_html/ wp-content/plugins/cronjob-scheduler/cronjob-scheduler.php on line 188 * Fatal error: require_once() [function.require]: Failed opening required ‘__DIR__/ views/admin_page.php’ (include_path=’.:/opt/alt/php52/usr/share/pear:/opt/alt/ php52/usr/share/php’) in /home/serpante/public_html/wp-content/plugins/cronjob- scheduler/cronjob-scheduler.php on line 188` * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221215) * Okay thank you that helps me a lot. Of course it is the __DIR__ magic constant which doesn’t exist in PHP 5.2! Please could you update your file under wp-content/ plugins/cronjob-scheduler/cronjob-scheduler.php with the contents from the following pastebin – [http://pastebin.com/XX03wwjn](http://pastebin.com/XX03wwjn) * This will update you to version 1.20. If everything runs smoothly then I will roll out support for PHP 5.2 * All the best, Chris. * Thread Starter [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221216) * Well, googleing these errors, i found some fix * You have to replace **__DIR__** with **dirname(__FILE__)** on lines 328, 188 and 181 in file **cronjob-scheduler.php** * Please check this and confirm it 🙂 * Later edit: we had same opinion 😀 * Thread Starter [vladurash](https://wordpress.org/support/users/vladurash/) * (@vladurash) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221218) * WORKS Perfect! Thanks alot! * Plugin Author [chrispage1](https://wordpress.org/support/users/chrispage1/) * (@chrispage1) * [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221219) * Great, pleased we got it sorted in the end! I have deployed this now as an official version. If you have any other issues, please create a new support request – I will mark this one as resolved! If you like the plugin and support provided, please review it 🙂 Reviews and donations help to keep the project going! * [@jfan2006](https://wordpress.org/support/users/jfan2006/) it should be all working for you now although if you still have issues then please create a new support thread I’ll be happy to help! Viewing 14 replies - 1 through 14 (of 14 total) The topic ‘Unable activate plugin’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/cronjob-scheduler.svg) * [Cronjob Scheduler](https://wordpress.org/plugins/cronjob-scheduler/) * [Frequently Asked Questions](https://wordpress.org/plugins/cronjob-scheduler/#faq) * [Support Threads](https://wordpress.org/support/plugin/cronjob-scheduler/) * [Active Topics](https://wordpress.org/support/plugin/cronjob-scheduler/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/cronjob-scheduler/unresolved/) * [Reviews](https://wordpress.org/support/plugin/cronjob-scheduler/reviews/) ## Tags * [unexpected T_function](https://wordpress.org/support/topic-tag/unexpected-t_function/) * 14 replies * 3 participants * Last reply from: [chrispage1](https://wordpress.org/support/users/chrispage1/) * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/unable-activate-plugin/#post-7221219) * Status: resolved