Question

我有一个脚本可以获取文件的内容并使用base64对其进行编码。这个脚本工作正常：

<?php
$targetPath="D:/timekeeping/logs/94-20160908.dat";
$data = base64_encode(file_get_contents($targetPath));
$file = fopen($targetPath, 'w');
fwrite($file, $data);
fclose($file);
echo "file contents has been encoded";
?>

现在，我想将内容解码回原始值。我试过了：

<?php
$targetPath="D:/timekeeping/logs/94-20160908.dat";
$data = base64_decode(file_get_contents($targetPath));
$file = fopen($targetPath, 'w');
fwrite($file, $data);
fclose($file);
echo "file contents has been decoded";
?>

但是不起作用。

Answer 1

您没有提供＆＃34;不工作＆＃34;的详细信息。我假设您进行双重编码或双重解码，因为输入＆amp;输出是同一个文件，考虑

<?php

$in = 'teszt';
$enc = base64_encode($in);
echo $enc,"\n";
$enc2 = base64_encode($enc);
echo $enc2,"\n";
$enc3 = base64_encode($enc2);
echo $enc3,"\n";

看看双重编码会发生什么

试试这个

<?php
$sourcePath="D:/timekeeping/logs/94-20160908.dec.dat";
$targetPath="D:/timekeeping/logs/94-20160908.enc.dat";
if (!file_exsits($sourcePath) || !file_readable($sourcePath) ) {
    die('missing source');
} 
$source = file_get_contents($sourcePath);
if (empty($source) ) {
    die('source file is empty');
}
$data = base64_encode($source);
$file = fopen($targetPath, 'w');
fwrite($file, $data);
fclose($file);
echo "file contents has been encoded";
?>

<?php
$sourcePath="D:/timekeeping/logs/94-20160908.enc.dat";
$targetPath="D:/timekeeping/logs/94-20160908.dec.dat";
if (!file_exsits($sourcePath) || !file_readable($sourcePath) ) {
    die('missing source');
} 
$source = file_get_contents($sourcePath);
if (empty($source) ) {
    die('source file is empty');
}
$data = base64_decode($source);
$file = fopen($targetPath, 'w');
fwrite($file, $data);
fclose($file);
echo "file contents has been decoded";
?>

Answer 2

这解决了我的问题。这两个函数不能很好地结合在一起所以我将file_get_contents与base64_decode

分开

    <?php
    $targetPath="D:/timekeeping/logs/94-20160908.dat";
    $data = file_get_contents($targetPath);
    $content= base64_decode($data);
    $file = fopen($targetPath, 'w');    
    fwrite($file, $content);
    fclose($file);
    echo "done";
?>

PHP解码base64文件内容

2 个答案: