PHP如何检测并清除文件开头的BOM信息？

更新时间：2024-04-24 16:33:58 作者：肥宅-季波我要评论(0)

用于检测并清除掉文件开头的BOM信息

<?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") . " ";
} else {
$dirname = $basedir . "/" . $file;
checkdir($dirname);
}
}
} //end while
closedir($dh);
} //end if($dh
} //end function
function checkBOM($filename) {
global $auto; // www.dmaku.com
$contents = file_get_contents($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, $rest);
return "BOM found, automatically removed.";
} else {
return ("BOM found.");
}
} else return ("BOM Not Found.");
} //end function
function rewrite($filename, $data) {
$filenum = fopen($filename, "w");
flock($filenum, LOCK_EX);
fwrite($filenum, $data);
fclose($filenum);
} //end function