// 去除BOM
function qcbom(){
	    $sql = new Baksql(\think\Config::get("database"));
	    $allfiles = $sql->allfiles(ROOT_PATH);
	    foreach($allfiles as $file){
	        if(stristr($file,'.php')||stristr($file,'.html')||stristr($file,'.txt')){
	            if(file_exists($file)){
        	        $str = file_get_contents($file);
        	        if($this->SearchBOM($str)){
        	            echo $file.'<br>';
        	            $str = substr($str, 3);
        	            file_put_contents($file, $str);
        	        }
	            }
	        }
	    }
	    exit;
	}
	
	// 搜索当前文件是否有BOM
	function SearchBOM($string) {
	    if(substr($string,0,3) == pack("CCC",0xef,0xbb,0xbf)) return true;
	    return false;
	}