下面小编就为大家带来一篇用php去掉文件头的unicode签名(bom)方法。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧
废话不多说，直接上代码
";
}
closedir($dh);
}
function checkBOM ($filename) {
$contents=file_get_contents($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) {
$rest=substr($contents, 3);
rewrite ($filename, $rest);
return true;
}
else return ("BOM Not Found.");
}
function rewrite ($filename, $data) {
$filenum=fopen($filename,"w");
flock($filenum,LOCK_EX);
fwrite($filenum,$data);
fclose($filenum);
}
?> 
