serialize(),unserialize()函数

serialize()可以将数组序列化

unserialize()可以将serialize()序列化得到的字符串还原(反序列化)

<?php
	$sites = array('Google', 'Runoob', 'Facebook');
	$serialized_data = serialize($sites);
	echo  $serialized_data . PHP_EOL;
	echo  "<br />";
	print_r(unserialize($serialized_data));
?>

a:3:{i:0;s:6:"Google";i:1;s:6:"Runoob";i:2;s:8:"Facebook";} 
Array ( [0] => Google [1] => Runoob [2] => Facebook )