使用php清除bom示例

本文主要介绍了使用PHP去除文件BOM头的的示例,需要的朋友可以参考下

function checkBOM ($filename) {  

       global $auto;  
       $contents = file_get_contents($filename);  
        $charset[1] = substr($contents, 0, 1);  
       $charset[2] = substr($contents, 1, 1);  
       $charset[3] = substr($contents, 2, 1);  
       if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {  
           if ($auto == 1) {  
              $rest = substr($contents, 3);  
              rewrite ($filename, $rest);  
              return ("<font color=red>BOM found, automatically removed.</font>");  
           }else {  
              return ("<font color=red>BOM found.</font>");  
           }  
       }else return ("BOM Not Found.");  
    }