Title: Error while switching to 7 php.
Last modified: August 31, 2016

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# Error while switching to 7 php.

 *  [Andrew Bondar](https://wordpress.org/support/users/kronos1705/)
 * (@kronos1705)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/error-while-switching-to-7-php/)
 * Hello.
    I translated the website in PHP7, but ran into a problem. A plug-in is
   not working and WordPress Related Posts. In the log files on the hosting is seen
   here such error:
 * [error] [client 141.8.142.73] \xd0\x91\xd0\xb0\xd0\xb7\xd0\xb0 \xd0\xb4\xd0\xb0\
   xd0\xbd\xd0\xbd\xd1\x8b\xd1\x85 WordPress \xd0\xb2\xd0\xbe\xd0\xb7\xd0\xb2\xd1\
   x80\xd0\xb0\xd1\x82\xd0\xb8\xd0\xbb\xd0\xb0 \xd0\xbe\xd1\x88\xd0\xb8\xd0\xb1\
   xd0\xba\xd1\x83 Illegal mix of collations for operation ‘ IN ‘ \xd0\xb2 \xd0\
   xbe\xd1\x82\xd0\xb2\xd0\xb5\xd1\x82 \xd0\xbd\xd0\xb0 \xd0\xb7\xd0\xb0\xd0\xbf\
   xd1\x80\xd0\xbe\xd1\x81 \n\t\t\tSELECT\n\t\t\t\ttarget.post_id, sum(target.weight*
   log(0 / least(0, freqs.freq))) as score\n\t\t\tFROM\n\t\t\t\twp_wp_rp_tags as
   target,\n\t\t\t\t(SELECT label, count(1) as freq FROM wp_wp_rp_tags\n\t\t\t\t\
   tWHERE label IN (‘P_\xf0\xb1\xf1\x83\xf0\xb4\xf0\xbe\xf0\xb8’, ‘P_\xf1\x83\xf0\
   xbe\xf0\xb3\xf0\xb5\xf1\x82\xf1\x8b’, ‘P_\xf1\x84\xf0\xbe\xf1\x82\xf0\xbe\xf0\
   xb3\xf1\x90\xf0\xb0\xf1\x84’, ‘C_\xf0\xa2\xf0\xbe\xf0\xb3\xf0\xb5\xf1\x82\xf1\
   x8b \xf0\xbe\xf0\xbe\xf0\xb3\xf0\xb8\xf1\x87\xf0\xba\xf1\x83’, ‘A_h2’)\n\t\t\
   t\t\tGROUP BY label\n\t\t\t\t) as freqs\n\t\t\tWHERE\n\t\t\t\ttarget.post_id 
   NOT IN (‘917’) AND\n\t\t\t\t\n\t\t\t\ttarget.label=freqs.label AND\n\t\t\t\ttarget.
   label IN (‘P_\xf0\xb1\xf1\x83\xf0\xb4\xf0\xbe\xf0\xb8’, ‘P_\xf1\x83\xf0\xbe\xf0\
   xb3\xf0\xb5\xf1\x82\xf1\x8b’, ‘P_\xf1\x84\xf0\xbe\xf1\x82\xf0\xbe\xf0\xb3\xf1\
   x90\xf0\xb0\xf1\x84’, ‘C_\xf0\xa2\xf0\xbe\xf0\xb3\xf0\xb5\xf1\x82\xf1\x8b \xf0\
   xbe\xf0\xbe\xf0\xb3\xf0\xb8\xf1\x87\xf0\xba\xf1\x83’, ‘A_h2’)\n\t\t\tGROUP BY
   target.post_id\n\t\t\tORDER BY score desc, target.post_id desc\n\t\t\tLIMIT 6;,\
   xd0\xb2\xd1\x8b\xd0\xbf\xd0\xbe\xd0\xbb\xd0\xbd\xd0\xb5\xd0\xbd\xd0\xbd\xd1\x8b\
   xd0\xb9 require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.
   php’), include(‘/themes/baskerville/single.php’), the_content, apply_filters(‘
   the_content’), wp_rp_add_related_posts_hook, wp_rp_get_related_posts, wp_rp_fetch_posts_and_title,
   wp_rp_append_posts, wp_rp_fetch_related_posts_v2
 * My version WP is 4.4.2
    Say, you can fix something in the settings or code? And
   in general, the plugin supports PHP? Or you need to wait for updates? Thank you
   in advance!
 * [https://wordpress.org/plugins/wordpress-23-related-posts-plugin/](https://wordpress.org/plugins/wordpress-23-related-posts-plugin/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [Andrew Bondar](https://wordpress.org/support/users/kronos1705/)
 * (@kronos1705)
 * [10 years ago](https://wordpress.org/support/topic/error-while-switching-to-7-php/#post-7255587)
 * Hello.
    The plugin still supported? I checked all the other plug-ins, by experiments
   on a test sub-domain. The reason has not changed, and unfortunately, lies in 
   WordPress Related Posts. If you can help, then encoding in my database and WP,
   is utf-8. I can do something on their own, or wait for the update? Thank you 
   in advance for your response.
 *  [PetraP](https://wordpress.org/support/users/petrap/)
 * (@petrap)
 * [10 years ago](https://wordpress.org/support/topic/error-while-switching-to-7-php/#post-7255591)
 * Hey,
 * thanks for reaching out and really sorry for the unintentional silent treatment!
 * I will mention the issue to our development team, so they can take a closer look.
   In the meantime, would it be possible if you could explain in greater detail 
   in what way does the plugin not work? Do the related posts not show up?
 * Looking forward to your reply,
    Petra
 *  Thread Starter [Andrew Bondar](https://wordpress.org/support/users/kronos1705/)
 * (@kronos1705)
 * [10 years ago](https://wordpress.org/support/topic/error-while-switching-to-7-php/#post-7255596)
 * Visual – the plugin works.
    Technically – the mistake of logs copied and given
   above. I can throw screenshots pragina settings, although almost all of them 
   by default. The error appears in the logs on the server for each access to website
   pages.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Error while switching to 7 php.’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wordpress-23-related-posts-plugin_7b9a7c.
   svg)
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 * 3 replies
 * 2 participants
 * Last reply from: [Andrew Bondar](https://wordpress.org/support/users/kronos1705/)
 * Last activity: [10 years ago](https://wordpress.org/support/topic/error-while-switching-to-7-php/#post-7255596)
 * Status: not resolved