论坛 › php › PHP检测并清除文件开头的BOM

wxsheng 发表于 2017-4-10 07:46:03

PHP检测并清除文件开头的BOM

<?php
ini_set('memory_limit', '-1');
/*检测并清除BOM*/
$basedir = dirname(__FILE__);//扫描当前文件路径 可自动设置
$auto = 1;
checkdir($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($dirname);
}
}
}//end while
closedir($dh);
}//end if($dh
}//end function
function checkBOM($filename){
global $auto;
$contents = file_get_contents($filename);
$charset = substr($contents, 0, 1);
$charset = substr($contents, 1, 1);
$charset = substr($contents, 2, 1);
if(ord($charset) == 239 && ord($charset) == 187 && ord($charset) == 191){
if($auto == 1){
$rest = substr($contents, 3);
rewrite ($filename, $rest);
return "<font color=red>BOM found, automatically removed.</font>";
}else{
return ("<font color=red>BOM found.</font>");
}
}
else return ("BOM Not Found.");
}//end function
function rewrite($filename, $data){
$filenum = fopen($filename, "w");
flock($filenum, LOCK_EX);
fwrite($filenum, $data);
fclose($filenum);
}//end function

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