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php base64_decode 与base64_encode  

base64_decode
( PHP 4中, PHP 5中)

base64_decode -解码数据的Base64编码的MIME

描述
字符串base64_decode (字符串$数据[ ,布尔$严格=虚假] )
解码一BASE64编码数据。

参数

数据
编码数据。

严格
返回FALSE如果输入包含字符以外的一个base64字母表。


返回值
返回原始数据或FALSE的失败。返回的数据可能是二进制。

修改

版本说明
5.2.0严格的补充


实例

例如# 1 base64_decode ( )的例子

$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';
echo base64_decode($str);
?>
The above example will output:

This is an encoded string

base64_encode
( PHP 4中, PHP 5中)

base64_encode -使用MIME编码的数据进行Base64

描述
字符串base64_encode (字符串$数据)
编码特定数据进行Base64 。

这种编码是为了使二进制数据生存运输通过运输层不支持8 - bit编码,如电子邮件机构。

进行Base64编码的数据大约需要33 %以上的空间比原始数据。

参数

数据
这些数据进行编码。


返回值
编码数据,作为一个字符串。

实例

例如# 1 base64_encode ( )的例子

$str = 'This is an encoded string';
echo base64_encode($str);
?>
The above example will output:

VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==


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