PHP 去掉 utf8格式文件中的bom头部
我们有时要去掉utf8文档中头部我们经常会需要手工清除了，下面我整理了几个利用php程序清除 utf8格式文件中的bom头部方法，希望对各位同学会有所帮助。
例1
<?php
/**
* 去掉文件中的 bom头
* @var 0.1
* @author Chenwp
*/
function clearbom($contents) {
//UTF8 去掉文本中的 bom头
$BOM = chr(239) . chr(187) . chr(191);
return str_replace($BOM, '', $contents);
}
/**
* 去掉文件中的bom头
* @param object $fileName Description
* @return object Description
*/
function clearfilebom($fileName) {
$c = file_get_contents($fileName);
$c = clearbom($c);
file_put_contents($fileName, $c);
}
?>例2
如何将带有BOM文件的格式转换成无签名的UTF-8格式文件呢？下面分享给大家一段PHP代码：
<?php
//此文件用于快速测试UTF8编码的文件是不是加了BOM，并可自动移除
$basedir = "."; //修改此行为需要检测的目录，点表示当前目录
$auto = 1; //是否自动移除发现的BOM信息。1为是，0为否。
//以下不用改动
if ($dh = opendir($basedir)) {
while (($file = readdir($dh)) !== false) {
if ($file != '.' && $file != '..' && !is_dir($basedir . "/" . $file)) echo "filename: $file " . checkBOM("$basedir/$file") . " <br>";
}
closedir($dh);
}
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);
if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {
if ($auto == 1) {
$rest = substr($contents, 3);
rewrite($filename, $rest);
return ("<font color=red>BOM found, automatically removed.</font>");
} else {
return ("<font color=red>BOM found.</font>");
}
} else return ("BOM Not Found.");
}
function rewrite($filename, $data) {
$filenum = fopen($filename, "w");
flock($filenum, LOCK_EX);
fwrite($filenum, $data);
fclose($filenum);
}
//结束
?>例3
<?php
// 设定你要清除BOM的根目录（会自动扫描所有子目录和文件）
$HOME = dirname(__FILE__);
// 如果是Windows系统，修改为：$WIN = 1;
$WIN = 0;
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>UTF8 BOM 清除器</title>
<style>
body { font-size: 10px; font-family: Arial, Helvetica, sans-serif; background: #FFF; color: #000; }
.FOUND { color: #F30; font-size: 14px; font-weight: bold; }
</style>
</head>
<body>
<?php
$BOMBED = array();
RecursiveFolder($HOME);
echo '<h2>These files had UTF8 BOM, but i cleaned them:</h2><p class="FOUND">';
foreach ($BOMBED as $utf) {
echo $utf . "<br />n";
}
echo '</p>';
// 递归扫描
function RecursiveFolder($sHOME) {
global $BOMBED, $WIN;
$win32 = ($WIN == 1) ? "" : "/";
$folder = dir($sHOME);
$foundfolders = array();
while ($file = $folder->read()) {
if ($file != "." and $file != "..") {
if (filetype($sHOME . $win32 . $file) == "dir") {
$foundfolders[count($foundfolders) ] = $sHOME . $win32 . $file;
} else {
$content = file_get_contents($sHOME . $win32 . $file);
$BOM = SearchBOM($content);
if ($BOM) {
$BOMBED[count($BOMBED) ] = $sHOME . $win32 . $file;
// 移出BOM信息
$content = substr($content, 3);
// 写回到原始文件
file_put_contents($sHOME . $win32 . $file, $content);
}
}
}
}
$folder->close();
if (count($foundfolders) > 0) {
foreach ($foundfolders as $folder) {
RecursiveFolder($folder, $win32);
}
}
}
// 搜索当前文件是否有BOM
function SearchBOM($string) {
if (substr($string, 0, 3) == pack("CCC", 0xef, 0xbb, 0xbf)) return true;
return false;
}
?>
</body>
</html>本文地址：http://www.phprm.com/code/55059.html
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