AstroFields/Core

<?php

namespace WCM\AstroFields\Core\Test;

class HooksMock
{
    /**
     * Equivalent to _wp_filter_build_unique_id() generate an unique id for a given callback
     * @author Giuseppe Mazzapica
     * @param callable $callback Callback to generate the unique id from
     * @return array|callable|null|string
     * @throws \InvalidArgumentException
     */
    public static function callbackUniqueId( $callback = null )
    {
        if ( ! is_callable( $callback ) )
            throw new \InvalidArgumentException( sprintf(
                'Use a valid callback with %s',
                __METHOD__
            ) );

        if ( is_string( $callback ) )
            return $callback;

        // Closures are currently implemented as objects
        if ( is_object( $callback ) )
            $callback = array( $callback, '' );

        if ( is_object( $callback[0] ) )
            return spl_object_hash( $callback[0] ).$callback[1];

        if ( is_string( $callback[0] ) )
            return "{$callback[0]}::{$callback[1]}";
    }
}