PHP serialization and deserialization functions

Serialization and deserialization

Compress complex data types into a string

Serialize () encodes the variables and their values into textual form unserialize () restores the original variable1. Create a $arr array to store the user's basic information and output the view results in the browser；

$arr =array ();
$arr [' name ']= ' Zhang San ';
$arr [' Age ']= ' 22 ';
$arr [' Sex ']= ' man ';
$arr [' Phone ']= ' 123456789 ';
$arr [' Address ']= ' Shanghai Pudong New Area ';
Var_dump ($arr);

Output Result:





["Address"]=> string (21) "Pudong New Area, Shanghai"
}

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

$info =serialize ($arr);
Var_dump ($info);

Output Result:
String "A:5:{s:4:" Name "; s:6:" Zhang San "; S:3:" Age "; S:2:" N "; s:3:" Sex "; S:3:" Male "; s:5:" Phone "; S:9:" 123456789 "; s:7:" Address "; s:21:" Pudong New Area, Shanghai ";}"

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;

$zhangsan =unserialize ($info);
Var_dump ($zhangsan);

Output Result:
Array (5) {





}

PHP serialization and deserialization functions