使用php清除bom示例_PHP

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 ("BOM found, automatically removed.");

}else {

return ("BOM found.");

}

}else return ("BOM Not Found.");

}