Which of the following experts can understand this line of code?

Who can understand this line of code? In the job table of the phpwind database, there is a reward field. the saved string seems to be in json format, but I have never seen this format. how can I use it? what are the advantages? It seems to be the rule configuration after the task is executed. the code is as follows: a: 4: {s: 4: & quot; type & quot; who can understand this line of code?
In the job table of the phpwind database, there is a reward field. the saved string seems to be in json format, but I have never seen this format. how can I use it? what are the advantages?
It seems to be the rule configuration after the task is executed. the code is as follows:

A: 4: {s: 4: "type"; s: 5: "money"; s: 3: "num"; s: 2: "10"; s: 8: "category"; s: 6: "credit"; s: 11: "information"; s: 17: "Copper coins available ";}

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Serialized. Easy to store.
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This is a php serialized string generated using the serialize function.
Available unserialize function restoration

The data in the example is an associated array with four elements, which must not be directly stored in the database.
The function of serialization is to convert a complex data structure into a simple string, which makes it easy to save
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Positive solution, which can be restored using unserialize
Discussion

Serialized. Easy to store.