Base64 online coding and decoding implementation code demo and download

2020-03-31 21:27:24
OfStack
Online presentation address:
Gb2312 version (link: http://tools.jb51.net/tools/base64_decode-gb2312.php)
Utf8 version (link: http://tools.jb51.net/tools/base64_decode-utf8.php)

<?php 
header('Content-Type: text/html; charset=gb2312'); 
$txt1 = stripslashes(trim( @$_POST['text1'])); 
$button = @$_POST['button']; 
$down = @trim($_GET['down']); 
if ($down==1) { 
header("Content-type: command"); 
header("Content-Disposition: attachment; filename=base64_decode.txt"); 
$contents = file_get_contents(basename($_SERVER['PHP_SELF'])); 
echo $contents; 
exit; 
} 
?> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<meta content="Base64 Online coding and decoding " name="keywords"> 
<title>Base64 Online coding and decoding  gb2312</title> 
<style> 
P { 
FONT-SIZE: 9pt; 
line-height:150%; 
width:50%; 
BORDER:#DDDDDD 1px solid; 
padding:5px 5px 5px 5px;text-align:justify; 
} 
A { 
text-decoration: none; 
font-size:9pt; 
color:blue 
} 
A:hover { 
COLOR: red; 
TEXT-DECORATION: underline 
} 
h1 { 
font-size:12pt; 
text-align:center; 
margin-top:30px; 
font-family:  Microsoft jas black , msyh, Tahoma, Helvetica, sans-serif; 
} 
.bginput, select { 
color:#000000; 
vertical-align:middle; 
padding:2px; 
border:1px solid #BAC0C3; 
background:#F9FBFD; 
} 
.button { 
vertical-align:middle; 
padding:1px 3px 0px 3px; 
background:#F3F4F5; 
border:1px solid #B7C0C7; 
margin:0px; 
width:180px; 
} 
div { 
width:100%; 
} 
</style> 
</head> 

<body topmargin="0" leftmargin="0" rightmargin="0" bottommargin="0"> 
<table border="0" width="100%" cellspacing="0" cellpadding="0" height="100%"> 
<tr><td height="20" bgcolor="#CCCCCC" align =right style="padding-right:5px;"> 
</td></tr><tr><td valign="top" align =center> 

<form name="form1" method="post" action=""> 
<h1>Base64 Online coding and decoding  gb2312 <a href="?down=1"> Download the source code </a></h1> 
<p> 
 Please enter the translation address:  
<textarea name="text1" rows="14" class="bginput" style="width:520px;"><?php echo htmlspecialchars($txt1,ENT_QUOTES);?></textarea> 
<br> 
 Please select the mode of conversion:  
<textarea rows="14" class="bginput" style="width:520px;"><?php 
if($button==" coding ") echo base64_encode($txt1); 
if($button==" decoding ") echo mb_convert_encoding(base64_decode($txt1),"gb2312","UTF-8"); 
?> 
</textarea> 
<br> 
</p> 
<input type="submit" name="button" class="button" value=" coding " /> 
<input type="submit" name="button" class="button" value=" decoding " /><br> 
</form> 
</td></tr> 
<tr><td height="10"></td></tr><tr><td height="20" bgcolor="#CCCCCC" align=center></td> 
</tr> 
</table> 
</body> 
</html>