convert_uuencode

(PHP 5)

convert_uuencode — 使用 uuencode 编码一个字符串

说明

string convert_uuencode ( string $data )

convert_uuencode() 使用 uuencode 算法对一个字符串进行编码。

uuencode 算法会将所有（含二进制）字符串转化为可输出的字符，并且可以被安全的应用于网络传输。使用 uuencode 编码后的数据将会比源数据大35%左右

参数

data: 需要被编码的数据。

返回值

返回 uuencode 编码后的数据或者在失败时返回 FALSE 。

范例

Example #1 convert_uuencode() 例子

  <?php
$some_string  =  "test\ntext text\r\n" ;

echo  convert_uuencode ( $some_string );
 ?>

参见

convert_uudecode() - 解码一个 uuencode 编码的字符串
base64_encode() - 使用 MIME base64 对数据进行编码

用户评论:

[#1] abc518 at gmail dot com [2008-09-26 13:06:55]

Using uuencode for passwords isn't any more secure than plain text (maybe slightly: non-developers or too lazy to figure out what you used). mcrypt or even md5 is much more secure.

[#2] zash at zash dot se [2008-05-30 00:30:47]

note that using base64 or uuencode to store data in a database is pretty useless. if you properly escape your data and use a binary field (BLOB etc) there is no problem.

[#3] allali at labri dot fr [2008-04-02 00:06:56]

if you want to use convert_uuencode with command uudecode you must insert a line "begin %s %s\n" at the beginning and "end\n" at the end:

<?php echo "begin 644 hello.txt\n"; echo convert_uuencode("hello"); echo "end\n"; ?>

the first arg. after begin is the mode (destination file rights), the second is the destination file name.

Then you can do a wget followed by a uudecode.

JA.

[#4] root at mantoru dot de [2007-11-10 09:29:20]

@Craig's note: base64_encode() is better suited for that. In fact, it produces smaller output and operates slightly faster. I did a little benchmark -- here are my findings:

File: JPG, 631614 bytes

== Base64 ==
execution time: 0.0039639472961426 secs
output length: 842152

== UUencode ==
execution time: 0.004105806350708 secs
output length: 870226

[#5] tmaschler at NOSPAM dot ditf-denkendorf dot de [2006-09-20 01:46:41]

Note to the tip of Craig at frostycoolslug dot com:

If you are using fulltext functionality on columns with uuencoded texts, collations will not work. You might prefer to pass the text escaped to the database engine.

[#6] nmmm at nmmm dot nu [2006-04-12 08:17:51]

uuencode is recognisable as email attachment in Ms Outlook, but in Outlook Express (at least in older versions) - is not.

This is shell script, but it may give you an idea how you can send attachments using uuencode:

cat file.bin | uuencode file.bin | mail someone@domain.com -s "file.bin"

uuencode mail attachments from other point of wiev are deprecated. However I use such technic for years now and it work well.

[#7] aidan at php dot net [2005-05-29 08:51:43]

This functionality is now implemented in the PEAR package PHP_Compat.

More information about using this function without upgrading your version of PHP can be found on the below link:

http://pear.php.net/package/PHP_Compat