PHP批量去除文件BOM头

auto 是否自动替换 默认否
dir 检查目录 默认./
display 是否显示所有文件 默认只显示有bom头的文件

<?php
empty($_GET['auto']) && $_GET['auto'] = 0;
empty($_GET['dir']) && $_GET['dir'] = './';
empty($_GET['display']) && $_GET['display'] = 0;

$basedir = $_GET['dir'];

$auto = $_GET['auto'];

$display = $_GET['display'];

checkdir($basedir);

/**
checkdir
@param unknown $basedir

/

function checkdir($basedir)

{

global $display;

if ($dh = opendir($basedir))

{

while (($file = readdir($dh)) !== false)

{

if ($file != '.' && $file != '..')

{

if (! is_dir($basedir . "/" . $file))

{ // 如果是文件

$fileName = "filename: {$basedir}/{$file}";

$fileName = str_pad($fileName,80,"-");

$result = checkBOM("$basedir/$file");

if($display==0 && $result =='BOM not found')

{

}

else

{

echo $fileName. checkBOM("$basedir/$file") . " <br>";

}

}

else

{

$dirname = $basedir . "/" . $file; // 如果是目录

echo "-----------{$dirname}<br>";

checkdir($dirname); // 递归

}

}

}

closedir($dh);

}

}

/*
check
@param unknown $filename

/

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);

// BOM

// 的前三个字符的ASCII

// 码分别为

// 239

// 187

// 191

if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191)

{

if ($auto == 1)

{

$rest = substr($contents, 3);

rewrite($filename, $rest);

return ("<b color=green>BOM found, automatically removed</b>");

}

else

{

return ("<b color=red>BOM found</b>");

}

}

else

{

return ("BOM not found");

}

}

/*
rewrite
@param unknown $filename
@param unknown $data

*/

function rewrite($filename, $data)

{

$filenum = fopen($filename, "w");

flock($filenum, LOCK_EX);

fwrite($filenum, $data);

fclose($filenum);

}