PHP批量检测并去除文件BOM头代码实例_php技巧

如下代码为PHP方式去除当前目录及子目录所有文件BOM信息的代码，新建文件，将其放倒根目录下，然后浏览器访问即可。

<?php<BR>if (isset($_GET['dir'])) { //设置文件目录  <BR>    $basedir = $_GET['dir'];<BR>} else {<BR>    $basedir = '.';<BR>}</P><P>$auto = 1;<BR>checkdir($basedir);</P><P>function checkdir($basedir)<BR>{<BR>    if ($dh = opendir($basedir)) {<BR>        while (($file = readdir($dh)) !== false) {<BR>            if ($file != '.' && $file != '..') {<BR>                if (!is_dir($basedir . "/" . $file)) {<BR>                    echo "filename: $basedir/$file " . checkBOM("$basedir/$file") . " <br>";<BR>                } else {<BR>                    $dirname = $basedir .<mark>@本文来源gaodaimacom搞#代%码@网-</mark><strong>搞代gaodaima码</strong> "/" . $file;<BR>                    checkdir($dirname);<BR>                }<BR>            }<BR>        }<BR>        closedir($dh);<BR>    }<BR>}<BR>function checkBOM($filename)<BR>{<BR>    global $auto;<BR>    $contents   = file_get_contents($filename);<BR>    $charset[1] = substr($contents, 0, 1);<BR>    $charset[2] = substr($contents, 1, 1);<BR>    $charset[3] = substr($contents, 2, 1);<BR>    if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {<BR>        if ($auto == 1) {<BR>            $rest = substr($contents, 3);<BR>            rewrite($filename, $rest);<BR>            return ("<font color="red">BOM found, automatically removed.</font>");<BR>        } else {<BR>            return ("<font color="red">BOM found.</font>");<BR>        }<BR>    } else<BR>        return ("BOM Not Found.");<BR>}</P><P>function rewrite($filename, $data)<BR>{<BR>    $filenum = fopen($filename, "w");<BR>    flock($filenum, LOCK_EX);<BR>    fwrite($filenum, $data);<BR>    fclose($filenum);<BR>}<BR>?><BR>

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