请问下面的是什么数据格式？用PHP如何处理？谢谢！

Question

i:5;a:10:{
i:2;a:2:{s:2:"df";s:1:"0";s:2:"da";s:1:"1";}
i:22;a:2:{s:2:"df";s:1:"1";s:2:"da";s:1:"1";}
i:18;a:2:{s:2:"df";s:1:"0";s:2:"da";s:1:"1";}
i:130;a:2:{s:2:"df";s:1:"0";s:2:"da";s:1:"2";}
i:4;a:2:{s:2:"df";s:1:"1";s:2:"da";s:1:"1";}
i:128;a:2:{s:2:"df";s:1:"1";s:2:"da";s:1:"1";}
i:20;a:2:{s:2:"df";s:1:"0";s:2:"da";s:1:"2";}
i:1;a:2:{s:2:"df";s:1:"1";s:2:"da";s:1:"2";}
i:3;a:2:{s:2:"df";s:1:"1";s:2:"da";s:1:"2";}
i:129;a:2:{s:2:"df";s:1:"1";s:2:"da";s:1:"1";}
}

Answer 1

i:5; 及后面部分，都是标准的序列化后的字符串，不包括换行，空格等字符，拼接在一起就不是了unserialize(substr(……));

Answer 2

你这个是断章取义了
去掉 开始的 i:5; 并删除回车换行符后，为 php 序列化串print_r(unserialize( $s ));
Array
(
    [2] => Array
        (
            [df] => 0
            [da] => 1
        )    [22] => Array
        (
            [df] => 1
            [da] => 1
        )    [18] => Array
        (
            [df] => 0
            [da] => 1
        )    [130] => Array
        (
            [df] => 0
            [da] => 2
        )    [4] => Array
        (
            [df] => 1
            [da] => 1
        )    [128] => Array
        (
            [df] => 1
            [da] => 1
        )    [20] => Array
        (
            [df] => 0
            [da] => 2
        )    [1] => Array
        (
            [df] => 1
            [da] => 2
        )    [3] => Array
        (
            [df] => 1
            [da] => 2
        )    [129] => Array
        (
            [df] => 1
            [da] => 1
        ))