How to remove php ufeff

How to remove ufeff in php: 1. Save the PHP file in a DOM-free format; 2. Check and remove ufeff through the "function checkBOM($filename){...}" method.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How to remove php ufeff?

php Remove the BOM\ufeff of the file

I encountered a problem today. The data returned by the request interface does not conform to the format. When I print it out with the browser, nothing can be seen. The problem was finally found to be \UFEFF (BOM header) in the data header. After searching, it was caused by the file encoding format being UTF8-BOM. The editor saved the format incorrectly during development. There are two solutions:

1. If the file size is small, you can use notopad to save it in a DOM-free format (Format -> Convert to UTF-8 DOM-free format)

2. When there are many files, use the following code. After running, you can specify Repair all files in the directory (the current directory if no parameters are passed)

':'只检测文件BOM不执行去除BOM操作
'; checkdir($basedir); function checkdir($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).' 
'; }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 (' 找到BOM并已自动去除'); }else{ return (' 找到BOM'); } }else{ return (' 没有找到BOM'); } } function rewrite($filename,$data){ $filenum=fopen($filename,'w'); flock($filenum,LOCK_EX); fwrite($filenum,$data); fclose($filenum); } ?>

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