json_encode PHP function to create Json string to exchange data

Convert PHP data to JSON

json_encode() converts PHP arrays and objects into JSON. JSON_THROW_ON_ERROR is useful when an encoding failure should not be silently ignored.

<?php
$data = [
    'name' => 'Alex',
    'marks' => [78, 84, 91],
];

echo json_encode($data, JSON_THROW_ON_ERROR);
?>

Current example first; the detailed examples below are retained for additional learning and comparison.

Json is a data exchange format like XML. You can learn about Json support of PHP here.

json_encode function takes data and converts them to a string, we call it as Json string. This string format follows a standard so it can be decoded back to its original data form at the receiving end.

Example 1 : PHP Class data

<?php
$my_data = new stdClass();
$my_data->name="plus2net";
$my_data->area="PHP";
$my_data->section="Json";

$out_data=json_encode($my_data);
echo $out_data;
?>

Output is here

{"name":"plus2net","area":"PHP","section":"Json"}

Example 2 : PHP Array data

$a=array("Apple"=>10,"Orange"=>40,"Mango"=>80,"Banana"=>30);

echo json_encode($a);

The output of the above code is here.

{"Apple":10,"Orange":40,"Mango":80,"Banana":30}

This is one of the simple requirements, so we will try some complex than this by using two arrays.

<?php
$my_data = new stdClass();
$my_data->name="plus2net";
$my_data->area="PHP";

$a=array("Apple"=>10,"Orange"=>40,"Mango"=>80);

$out_data=array($a,"data"=>$my_data);
echo json_encode($out_data);
?>

The output of the above code is here.

{"0":{"Apple":10,"Orange":40,"Mango":80},"data":{"name":"plus2net","area":"PHP"}}

You can start from here making your json string to exchange data across pages.

You can use database records to create JSons string and pass the data to different pages. Download the zip file to check the demo scripts using student table data to create Json string.

json data formatting
Json XML Ajax

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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json_encode() to convert data to string

Convert PHP data to JSON

Example 1 : PHP Class data

Example 2 : PHP Array data

Subhendu Mohapatra