PHP Serialization and deserialization

Serialization and deserialization

Compress complex data types into a string

Serialize () encodes variables and their values into textual form
Unserialize () restore the original variable

1. Create a $arr array to store the user's basic information and output the view results in the browser;

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1234567

$arr=array();$arr[‘name‘]=‘张三‘;$arr[‘age‘]=‘22‘;$arr[‘sex‘]=‘男‘;$arr[‘phone‘]=‘123456789‘;$arr[‘address‘]=‘上海市浦东新区‘;var_dump($arr)；

Output Result:

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1234567

array (5) { [ "name" ]=> string (6) "Zhang San" [ Code class= "PHP string" > "age" ]=> string (2) "22" [ "sex" ]=> String (3) "male" [ " Phone " ]=> string (9) " 123456789 " [ "address" ]=> string (21) "Shanghai Pudong New Area"   }

2. Serialize the $arr array to the $info string and output the view results in the browser;

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12	$info=serialize($arr);var_dump($info);

Output Result:

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1	string "A:5:{s:4:" name Zhang San age 22 sex male phone 123456789 address ";}"

Use the serialization serialize ($arr) function to concatenate the keys and values of the elements in the array into strings in a regular order. The A:5 flag is serialized as an array that contains 5 key-value pairs, and the S:4 flag content is a string containing 4 characters.

By serializing we can store some of the modular data in the form of a string, such as a database or session, can reduce the creation of a lot of tedious data table fields, of course, serialization to string storage will add additional space, should be reasonable design and application.

3. Finally use Unserialize ($info) deserialization to restore the string to the array pattern we need;

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12	$zhangsan=unserialize($info);var_dump($zhangsan);

Output Result:

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1234567

array (5) { [ " name " ]=> string (6) "Zhang San" [ "age" ]=> string (2) "$" [ "sex" ]=> string (3) "male" [ "phone" ]=> string (9) "123456789" [ ]=> string (+) Code class= "PHP string" > "Shanghai Pudong New Area" }

Serialization and deserialization of PHP