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【PHP】批量清除BOM头

作者:Suppender / 发布于2015/7/9/ 553

有些php文件由于不小心保存成了含bom头的格式而导致出现一系列的问题。以下是批量清除bom头的代码


	<?php
	//有些php文件由于不小心保存成了含bom头的格式而导致出现一系列的问题。以下是批量清除bom头的代码
	
	if (isset ( $_GET ['dir'] )) { //config the basedir
	 $basedir = $_GET ['dir'];
	} else {
	 $basedir = '.';
	}
	$basedir="./weibo/";
	$auto = 1;
	
	checkdir ( $basedir );
	
	function checkdir($basedir) {
	 if ($dh = opendir ( $basedir )) {
	 while ( ($file = readdir ( $dh )) !== false ) {
	 if ($file != '.' && $file != '..') {
	 if (! is_dir ( $basedir . "/" . $file )) { // 如果是文件
	 echo "filename: $basedir/$file " . checkBOM ( "$basedir/$file" ) . " ";
	 } else {
	 $dirname = $basedir . "/" .$file; // 如果是目录
	 checkdir ( $dirname ); // 递归
	 }
	 }
	 }
	 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 ( $charset [3] ) == 191) { // BOM 的前三个字符的ASCII 码分别为 239 187 191
	 if ($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 );
	}

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　BOM头　

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