js跨域兑现统计

js跨域实现统计
前端js部分

if($_GET['click']==1){if(file_exists("count.txt")){$count=file_get_contents('count.txt');$count=$count+1;Tools::writeFile($count,'count.txt');echo 'document.getElementById("count").innerHTML='.$count;}else{Tools::writeFile('1000','count.txt');echo 'document.getElementById("count").innerHTML=12';//echo '12';}}else{$count=file_get_contents('count.txt');echo 'document.write("'.$count.'")';}