Vérification de la présence ACF et du plugin ACF Gallery

check-acf.php

<?php
if( !class_exists( 'acf' ) || !function_exists( 'acfgp_register_fields' ) )
{
	function tp_acf_admin_error_notice()
	{
		$plugin = get_plugin_data( __FILE__ );

		echo '<div class="error"><p><strong>'. $plugin['Name'] .'</strong> need <strong>ACF</strong> and <strong>ACF Gallery Field</strong> plugin to work :(</p></div>';
	}
	add_action( 'admin_notices', 'tp_acf_admin_error_notice' );

	return;
}