WordPress delete_option(); Wildcard capability?

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How would one go about deleting all option names in a WordPress database beginning with a specific prefix?

I would assume we need to specify a prefix, get all options that begin with that prefix, and then delete each option found.

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Here is a sample of the prefix and WP functions for getting and deleting options in the database. 

<?php
$prefix = 'cpt_';
$getOpt = get_option($prefix);
foreach($getOpt as $toDelete){
    $deleteOpt = delete_option($prefix);
    if(!$deleteOpt){
        echo 'Failure.';
    }
    if($deleteOpt){
        echo 'Success.';
    }
}
?>

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2 comments

  1. You could run this query:

    global $wpdb;
$wpdb->query( "DELETE FROM {$wpdb->options} WHERE option_name LIKE 'cpt_%'" );

    or put it in a function like so:

    function delete_options_prefixed( $prefix ) {
    global $wpdb;
    $wpdb->query( "DELETE FROM {$wpdb->options} WHERE option_name LIKE '{$prefix}%'" );
}
delete_options_prefixed( 'cpt_' );

  2. You need to make a “whitelist” of all the variables your plugin sets (I assume you are looking at a plugin uninstall script), then just loop through it at the other end so you can delete them all.

    Something as simple as:

    // Somewhere in your plugin, maybe as a class property
$pluginDefinedOptions = array('my_name', 'my_created', 'my_modified'); // etc

// Clear up our settings
foreach($pluginDefinedOptions as $optionName) {
    delete_option($optionName);
}

    This is the only way to keep your plugin code tidy.