PHP移除文件Bom头

PHP移除文件Bom头

// An highlighted block
class removeBom
{
	public $auto=1;
	public function checkdir($basedir)
	{
	    if($dh=opendir($basedir)){
	        while (($file=readdir($dh)) !== false){
	            if($file != '.' && $file != '..'){
	                if(!is_dir($basedir.'/'.$file)){
	                    echo '文件: '.$basedir.'/'.$file .checkBOM($basedir.'/'.$file).' <br>';
	                } else {
	                    $dirname=$basedir.'/'.$file;
	                    checkdir($dirname);
	                }
	            }
	        }
	        closedir($dh);
	    }
	}
	public function checkBOM($filename)
	{
	    $contents=file_get_contents($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($charset[3])==191){
	        if($this->auto==1){
	            $rest=substr($contents,3);
	            rewrite($filename,$rest);
	            return (' <font color=red>找到BOM并已自动去除</font>');
	        } else {
	            return (' <font color=red>找到BOM</font>');
	        }
	    } else {
	        return (' 没有找到BOM');
	    }
	}
	public function rewrite($filename,$data)
	{
	    $filenum=fopen($filename,'w');
	    flock($filenum,LOCK_EX);
	    fwrite($filenum,$data);
	    fclose($filenum);
	}
}

$remove = new removeBom;
$path = '/path/to/yourdir';
$remove->checkdir($path);