How to add data to a JSON file - php

Question

I would like to be able to add to a JSON file via a online portal using PHP.
I have attempted to do this with the code below, How ever I am not familiar with PHP so I can not get further.
<?php
//Get the data from the url
$name = $_GET['name'];
$email = $_GET['email'];
// read json file
$data = file_get_contents('example.json');
// decode json
$json_arr = json_decode($data, true);
// add data
$json_arr[] = array(4, 'Name'=>$name, 'email'=>$email);
// encode json and save to file
file_put_contents('example.json', json_encode($json_arr));
?>
My attempt:
[{"0":4,"Name":"kieran","email":"ex#ex.com"}]
What I would want to add
//This is want the JSON should be
"0": {
"conditionName": "u",
"ignoreFollowing": false,
"emailsThisSession": 0,
"recieverEmails": [
"example#g.c"
],
"alertType": 1,
"emailProperty": 2,
"triggers": {
"0": {
"Property": 2,
"Value": "zk-reg",
"ComparisonType": "Equals"
}
}
},
This is the whole JSON:
{
"0": {
"conditionName": "u",
"ignoreFollowing": false,
"emailsThisSession": 0,
"recieverEmails": [
"example#g.c"
],
"alertType": 1,
"emailProperty": 2,
"triggers": {
"0": {
"Property": 2,
"Value": "zk-reg",
"ComparisonType": "Equals"
}
}
},
"1": {
"conditionName": "k",
"ignoreFollowing": false,
"emailsThisSession": 0,
"recieverEmails": [
"h#f.com"
],
"alertType": 1,
"emailProperty": 0,
"triggers": {
"0": {
"Property": 0,
"Value": "",
"ComparisonType": "Equals"
}
}
}
}

Answer 1

If I am understanding you correctly you want to do something like
<?php
// read json file in this case I just include it in the script for simplicity
$data = '{
"0": {
"conditionName": "u",
"ignoreFollowing": false,
"emailsThisSession": 0,
"recieverEmails": [
"example#g.c"
],
"alertType": 1,
"emailProperty": 2,
"triggers": {
"0": {
"Property": 2,
"Value": "zk-reg",
"ComparisonType": "Equals"
}
}
},
"1": {
"conditionName": "k",
"ignoreFollowing": false,
"emailsThisSession": 0,
"recieverEmails": [
"h#f.com"
],
"alertType": 1,
"emailProperty": 0,
"triggers": {
"0": {
"Property": 0,
"Value": "",
"ComparisonType": "Equals"
}
}
}
}';
// decode json
$json_arr = json_decode($data, true);
echo "Before Count " . count($json_arr);
// add data
//put the array of variables you want to add into its own var, add each variable you want, I've done the first two
$rowToAdd = array("conditionName" => "y", "ignoreFollowing" => false, "emailsThisSession" => 800, "recieverEmails" => array("h#f.com"));
//use array_push to add to the current array rather over-writing it
array_push($json_arr , $rowToAdd);
echo "After Count " . count($json_arr);
// encode json and save to file
file_put_contents('example.json', json_encode($json_arr));
?>

Answer 2

Try it:
//$data is data you wanto add.
$json_files = file_get_contents('example.json');
$tempArray = json_decode($json_files);
array_push($tempArray, $data);
$jsonData = json_encode($tempArray);
file_put_contents('example.json', $jsonData);