Analysis of serialize Serialization data and JSON format data of PHP

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Serialize serialization

In some old WEB systems, we may see a large string of string text content that seems to have a special meaning stored in a database or in a text file. If we look closely, we will find that it has information such as data type and structure, but it is not easy to read manually, it is only suitable for PHP programs to read. PHP's serialize serializes and stores the array. Let's assume that there is an array like this:

$arr = array ("0" = > array ("gameName" = > "Germany", "homeName" = > "Bielefeld", "guestName" = > "Brunswick", "endTime" = > "2015-08-21"), "1" = > array ("gameName" = > Premier League, "homeName" = > Crystal Palace, "guestName" = > "Aston Villa" "endTime" = > "2015-08-22"))

We want to store the contents of this array in a database or text file so that it can be read elsewhere.

$serialize = serialize ($arr); echo $serialize

We serialize the array using PHP's serialize to output the following result:

GuestName 2: "guestName"; SPLR 12: "Brunswick"; SPLV 7: "endTime"; SPL10: "2015-08-21";} iRank 1: 4: {SJV 8: "gameName"; Srig 6: "Premier League"; Srig 8: "homeName" SRV 9: "Crystal Palace"; Srig 9: "guestName"; SRV 15: "Aston Villa"; SRV 7: "endTime"; SRV 10: "2015-08-22";}}

The result of the above output looks complex, but it is actually very simple, it shows some data types and structures.

ARanger 2 indicates that this is an array with two elements (array)

IRank 0 refers to sequential index

ARV 4 means there are 4 fields.

SRAR8: "gameName" indicates that this is an 8-character string (string)

In actual development, we only store the serialized data, and do not care about the format of the storage and the meaning of the field. If you want to restore the serialized data into an array, you can use the unserialize () function.

Print_r (unserialize ($serialize))

The above code can print out an array.

JSON data parsing

We know that the PHP operation JSON can use two functions, json_encode () and json_decode (). Json_encode () can convert an array to text data in json format, which is easy to store and read, while json_decode () can directly convert json data into an array, which is easy to call.

$jsonencode = json_encode ($arr); echo $jsonencode

Output:

[{"gameName": "\ u5fb7\ u4e59", "homeName": "\ u6bd4\ u52d2\ u8d39\ u5c14\ u5fb7", "guestName": "\ u4e0d\ u4f26\ u745e\ u514b", "endTime": "2015-08-21"}, {"gameName": "\ u82f1\ u8d85", "homeName": "\ u6c34\ u6676\ u5bab", "guestName": "\ u963f\ u65af\ u987f\ u7ef4\ u62c9", "endTime": "2015-08-22"}]

Obviously, after using JSON, the data space is less than serialize, and the Chinese string in the output result is encoded, so it is easy to identify manually, and the key is that the data in JSON format is convenient for other languages to read and identify, so some people say that it is a substitute for XML. The data in JSON format can communicate asynchronously with WEB front-end JS. If you want to restore json to an array, you can use the json_decode () function.

Print_r (json_decode ($jsonencode,true))

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