(PHP 4, PHP 5, PHP 7, PHP 8)
session_encode — 将当前会话数据编码为字符串
session_encode() 返回一个序列化后的字符串，包含被编码的、储存于 $_SESSION 超全局变量中的当前会话数据。
默认情况下，PHP 内部使用的序列方法和 serialize() 是不一样的。 该序列方法通过 session.serialize_handler 来设置。
此函数没有参数。
返回当前会话编码后的内容， 或者在失败时返回 false。
在调用 session_encode() 之前必须先调用 session_start()。
session_encode() just return the session dataset in a formatted form
session_start();
$_SESSION['login_ok'] = true;
$_SESSION['nome'] = 'sica';
$_SESSION['inteiro'] = 34;
echo session_encode();
this code will print
login_ok|b:1;nome|s:4:"sica";inteiro|i:34;session_encode() can't handle pipes in your keys.
<?php
session_start();
$_SESSION = ['foo|bar'=>'ba;z']; pathetic
dump(session_encode()); // false because "foo|bar" contains a pipe
?>The session_encode and session_decode functions are incomplete.
Because there is no option to collect the output values for session_decode or input an array in session_encode.
I faced this issue while trying to implement custom session using session_set_save_handler.
It led me to limit the functionality to particular serialize_handler and had to hardcode the encode and decode functions like serialize and unserialize for option ['serialize_handler' => 'php_serialize'] instead of session_encode and session_decode once i am done with defining the encoding algo.