in_array() expects parameter 2 to be array, boolean given in line 45

Question

In the error log of my server i´m getting the following PHP Warning:

in_array() expects parameter 2 to be array, boolean given in " //..." on line 45.

In line 45 i have set a function that checks wether WooCommerce plug-in is active.

    /**
 * Construction function
 */
public function __construct() {
    // Check if Woocomerce plugin is actived
    if ( ! in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {
        return;
    }

    $this->new_duration = sober_get_option( 'product_newness' );

    $this->parse_query();
    $this->hooks();
}

Checking if it´s active with the if statement is necessary, is there anything i´m not seeing?

The error keeps popping up in my error log.

Answer 1

You need to change the method how you verify if a plugin is available.

if(!is_plugin_active('woocommerce/woocommerce.php')) {
    return;
}

Your method fails, because you check with in_array() which needs to have the 2nd parameter being an array, but apply_filters() returns a bool.

Update

You could try to cast the result of apply_filters() being an array.

if ( ! in_array( 'woocommerce/woocommerce.php', (array)apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {
   return;
}