Detailed explanation of the usage of php json related functions

This article mainly introduces the usage of php json related functions, lists the functions of json_encode, json_decode and json_last_error, and analyzes the specific usage skills of json_encode and json_decode functions with examples. Friends in need can refer to it

The examples in this article describe the usage of php json related functions. Share it with everyone for your reference, the details are as follows:

Function list:

Function	Description
json_encode	Json encoding of variables
json_decode	Decode the string in json format and convert it into a php variable
json_last_error	Return the last error that occurred

##For example 1: json_encode

$arr=array("A"=>"a","B"=>"b","C"=>"c","D"=>"d");
echo json_encode($arr);

output:

{"A":"a","B":"b","C":"c","D":"d"}

For example 2: json_decode

$arr='{"A":"a","B":"b","C":"c","D":"d"}';
var_dump(json_decode($arr));
var_dump(json_decode($arr,true));

output:

object(stdClass)[1]
 public 'A' => string 'a' (length=1)
 public 'B' => string 'b' (length=1)
 public 'C' => string 'c' (length=1)
 public 'D' => string 'd' (length=1)
array (size=4)
 'A' => string 'a' (length=1)
 'B' => string 'b' (length=1)
 'C' => string 'c' (length=1)
 'D' => string 'd' (length=1)

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