How to convert array to json format in php

In PHP, you can use the json_encode() function to convert an array into json format data. The syntax is "json_encode (array variable)". The json_encode() function can JSON encode variables, returning JSON data if successful, and FALSE if failed.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

json_encode() can be used in PHP Function to convert array to json format data.

<?php
   $arr = array(&#39;a&#39; => 1, &#39;b&#39; => 2, &#39;c&#39; => 3, &#39;d&#39; => 4, &#39;e&#39; => 5);
   echo json_encode($arr);
?>

The execution result of the above code is:

{"a":1,"b":2,"c":3,"d":4,"e":5}

JSON function

##json_encodeJSON encode the variablejson_decodeDecode the JSON format string and convert it into a PHP variablejson_last_errorReturn the last error that occurred

Function	Description

json_encode

PHP json_encode() is used to JSON encode variables. This function returns JSON data if executed successfully, otherwise it returns FALSE.

Syntax

string json_encode ( $value [, $options = 0 ] )

Parameters

• value: The value to encode. This function is only valid for UTF-8 encoded data.
• options: Binary mask composed of the following constants: JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT

The following example demonstrates Learn how to convert PHP objects into JSON format data:

<?php
   class Emp {
       public $name = "";
       public $hobbies  = "";
       public $birthdate = "";
   }
   $e = new Emp();
   $e->name = "sachin";
   $e->hobbies  = "sports";
   $e->birthdate = date(&#39;m/d/Y h:i:s a&#39;, "8/5/1974 12:20:03 p");
   $e->birthdate = date(&#39;m/d/Y h:i:s a&#39;, strtotime("8/5/1974 12:20:03"));

   echo json_encode($e);
?>

The above code execution result is:

{"name":"sachin","hobbies":"sports","birthdate":"08\/05\/1974 12:20:03 pm"}

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json_decode

PHP json_decode() function is used to decode JSON format strings and convert them into PHP variables.

Syntax

mixed json_decode ($json_string [,$assoc = false [, $depth = 512 [, $options = 0 ]]])

Parameters

• json_string: To be decoded JSON string, must be UTF-8 encoded data

• assoc: When this parameter is TRUE, an array will be returned, and when FALSE, an object will be returned.

• depth: A parameter of type integer that specifies the recursion depth

• options: Binary Mask, currently only JSON_BIGINT_AS_STRING is supported.

Example

The following example demonstrates how to decode JSON data:

The execution result of the above code is:

object(stdClass)#1 (5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}

array(5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}

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