I'm developing a WordPress plugin, but the last changes caused the plugin to stop working. It tells me that I can't activate the plugin because it caused a fatal error. On localhost all is working fine, but after sending to the server, on activation it displays the following:
Can't use function return value in write context in /data/web/virtuals/72282/virtual/www/wp-content/plugins/wp-songbook/inc/wpsongs-shortcs.php on line 83
I really don't understand the context of this message, because the code of this line is:
Can anyone tell me what's happened?