[wp-trac] [WordPress Trac] #27196: More informative message when plugin installs fail

[WordPress Trac]

#27196: More informative message when plugin installs fail
---------------------------+-----------------------------------
 Reporter:  DavidAnderson  |       Owner:  (none)
     Type:  enhancement    |      Status:  closed
 Priority:  normal         |   Milestone:
Component:  Text Changes   |     Version:  3.8
 Severity:  normal         |  Resolution:  maybelater
 Keywords:  needs-patch    |     Focuses:  docs, administration
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Comment (by DavidAnderson):

 Greetings, past self! 4 more years of people baffled by WordPress's tech-
 speak in this message passed before I realised I could help them without a
 fix in core.... in case anybody else finds this useful, here's how to do
 it (change the slug and message for your case, of course)...

 {{{#!php
 <?php
 add_filter('upgrader_source_selection', 'my_upgrader_source_selection',
 10, 4);
 function my_upgrader_source_selection($source, $remote_source,
 $upgrader_object, $hook_extra) {

         if (!is_array($hook_extra) || empty($hook_extra['type']) ||
 'plugin' !== $hook_extra['type'] || empty($hook_extra['action']) ||
 'install' !== $hook_extra['action'] || empty($source) || 'updraftplus' !==
 basename(untrailingslashit($source)) || !class_exists('ReflectionObject'))
 return $source;

         $reflect = new ReflectionObject($upgrader_object);

         $properties = $reflect->getProperty('strings');

         if (!$properties::IS_PUBLIC ||
 !is_array($upgrader_object->strings) ||
 empty($upgrader_object->strings['folder_exists'])) return $source;

         $upgrader_object->strings['folder_exists'] .= ' '.__('A version of
 UpdraftPlus is already installed. WordPress will only allow you to install
 your new version after first de-installing the existing one. That is safe
 - all your settings and backups will be retained. So, go to the "Plugins"
 page, de-activate and de-install UpdraftPlus, and then try again.',
 'updraftplus');

         return $source;

 }
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/27196#comment:36>
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