How to use json_encode function to convert specified value to JSON format

The method to use the json_encode function to convert the specified value into JSON format is to convert it through the syntax "string json_encode( $value [, JSON constant [, depth = 512 ]] )".

The operating environment of this tutorial: Windows 7 system, PHP version 7.1, DELL G3 computer.

The json_encode function can convert the specified value into JSON format, so in this article we will introduce to you the specific method of using the json_encode function to convert the specified value into JSON format.

First let’s take a look at the json_encode function description

string json_encode( $值 [, JSON常数 [, 深度 = 512 ]] )

Parameters:

The first parameter specifies the string or array used to convert to JSON format .

If you specify the second parameter, you can specify the format to be converted and optionally specify a constant.

When specifying the third parameter, the maximum depth can be specified as a positive number.

Return value:

The json_encode function returns the JSON encoded value as the return value, or false if the process fails.

Note: All string data to be converted must be encoded with character code UTR-8.

Next let’s take a lookHow to use the json_encode function

Let’s look at a specific example

$fruits_array = ['apple'=>'fruits1',
                 'orange'=>'fruits2',
                 'melon'=>'fruits3',
                 'pineapple'=>'fruits4',
                 'Strawberry'=>'fruits5'
                ];
$jsonstr =  json_encode($fruits_array);
echo $jsonstr;

Execution results

{"apple":"fruits1","orange":"fruits2","melon":"fruits3","pineapple":"fruits4","Strawberry":"fruits5"}

View the execution results. There is a colon ":" between strings, and each is separated by a comma ",".

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