Mu-plugin causes entire site to crash

Question

Mu-plugin causes entire site to crash

Peter Kirwan

2019年5月20日 13:16

I think i'm probably doing something daft here. Every time i try to include this as a mu-plugin it takes down the test site though.

?php
if( is_plugin_active( '/public_html/wp-content/plugins/wordfence.php' ) ) {
    require_once('wp-load.php');
    $to = ‘myemail@gmail.com’;
    $subject = ‘Wordfence is down’;
    $message = ‘Wordfence is not active’;
    $headers = array('Content-Type: text/html; charset=UTF-8');
    wp_mail( $to, $subject, $message, $headers );
}

Any ideas where i'm going wrong would be very much appreciated :)

Topic mu-plugins Wordpress

Category Web

Rup · Accepted Answer · 2019年5月20日 13:16

is_plugin_active isn't available for mu-plugins to use. The codex says:

NOTE: defined in wp-admin/includes/plugin.php, so this is only available from within the admin pages, and any references to this function must be hooked to admin_init or a later action. If you want to use this function from within a template or a must-use plugin, you will need to manually require plugin.php, an example is below.

And I think there must be better ways to solve this anyway: your code will try and send you an email for every non-static HTTP request to the site, and you probably meant !is_plugin_active or is_plugin_inactive, and in any case these accept relative paths to the plugin files not absolute paths.

MikeNGarrett · Accepted Answer · 2019年5月20日 13:05

1

MikeNGarrett answered at 2019年5月20日 13:05

It's best to turn on WP_DEBUG to see exactly what problem you're facing. The code above includes fancy quotes like ‘ and ’ and doesn't include the full path to wp-load.php.

Mu-plugin causes entire site to crash

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