Add ‘phpinfo()‘ to Your WordPress Site

From time to time, you may find it nec­es­sary to check out phpinfo() in order to see your server’s capa­bil­i­ties, lim­i­ta­tions, or what­ev­er. While it’s tempt­ing to upload a file to your serve con­tain­ing only <?php phpinfo(); ?>, it’s not a good idea to leave that file there for the world to see; like­wise, it’s a pain to delete it and upload it repeat­ed­ly, as it’s needed.

You can add phpinfo() capa­bil­i­ties right to Word­Press by adding the fol­low­ing code to your The­sis custom_functions.php file, appro­pri­ate theme cus­tom file, or site cus­tomiza­tion plu­g­in. The code will allow you to access phpinfo() by append­ing ?phpinfo=1 (or &phpinfo=1 if there are already para­me­ters present) to any address on your site, front or backend.

There will also be a link to the phpinfo() added to the Tools sec­tion of the Word­Press admin pan­el menu for your convenience.

And you can eas­i­ly con­trol which of your reg­is­tered users by mod­i­fy­ing the PHPINFO_ACCESS vari­able near the top of the code; pos­si­ble val­ues for it are avail­able on the Word­Press Codex.

/**
 * Enable phpinfo() viewing from within WordPress
 */
function custom_do_phpinfo_page() {
	# Define access level
	define( 'PHPINFO_ACCESS', 'remove_users' );

	if ( current_user_can( PHPINFO_ACCESS ) && isset( $_GET['phpinfo'] ) &&  true == $_GET['phpinfo'] ) {
		phpinfo();
		exit;
	}
}
add_action( 'init', 'custom_do_phpinfo_page' );

/**
 * Add phpinfo() link to WordPress admin menu
 */
function custom_add_phpinfo_menu_item() {
	global $submenu;

	$submenu[ 'tools.php' ][ 500 ] = array( 'phpinfo()', PHPINFO_ACCESS , get_home_url() . '/?phpinfo=1' ); 
}  
add_action( 'admin_menu', 'custom_add_phpinfo_menu_item' );

Did you know you can add arbi­trary links to the Word­sPress admin menu? Sure can!