当你的项目头部无缘无故出现了一条白条，这个是utf8文件编码可能是utf8-bom如果不是，文件本身编码问题的话！那木就是thinkphp自身对文件进行utf-8-bom编码，此时去掉白条的方法就是，在项目根目录，执行此段代码！ok了
<?phpif(isset($_GET[‘dir‘])){ //config the basedir ?$basedir=$_GET[‘dir‘];}else{ ?$basedir= ‘.‘;}$auto= 1;checkdir($basedir);function checkdir($basedir){ ?if($dh= opendir($basedir)) { ???while(($file= readdir($dh)) !== false) { ?????if($file!= ‘.‘&& $file!= ‘..‘){ ???????if(!is_dir($basedir."/".$file)) { ?????????echo"filename: $basedir/$file".checkBOM("$basedir/$file")."<br>"; ???????}else{ ?????????$dirname= $basedir."/".$file; ?????????checkdir($dirname); ???????} ?????} ???} ?closedir($dh); ?}}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, $rest); ?????return("<font color=red>BOM found,automatically removed.</font>"); ???} else{ ?????return("<font color=red>BOM found.</font>"); ???} ?} ?else return("BOM Not Found.");}function rewrite ($filename, $data) { ?$filenum= fopen($filename, "w"); ?flock($filenum, LOCK_EX); ?fwrite($filenum, $data); ?fclose($filenum);}?> thinkphp 框架去掉bom（当你的网站出现头部有一条空白）
原文地址：https://www.cnblogs.com/xxzz/p/8855148.html