Get data from json file without index in php - php

Question

I have a JSON file like this
[
{
"item_id": "342",
"item_title": "James"
},
{
"item_id": "374",
"item_title": "Fred"
}
]
And I would like to get the item_title in PHP but using the item_id.
How would I go about this?
I have
$item_id = 374;
$url = 'file.json';
$data = file_get_contents($url);
$items = json_decode($data);
Thank you.

Answer 1

You can use array_search() and array_column() if you know that key will always exist
echo $items[array_search($item_id,array_column($items,'item_id'))]['item_title'];
https://3v4l.org/Qddcj
Otherwise go for functional approach
$items = json_decode($data,true);
function getItemTitle($array,$item_id){
$key = array_search($item_id,array_column($array,'item_id'));
if($key !==false && isset($array[$key]['item_title'])){
return $array[$key]['item_title'];
}else{
return "no title found for given id ".$item_id;
}
}
echo getItemTitle($items,$item_id);
Output:- https://3v4l.org/ikKWY
In case if same id can be repeated multiple time
$items = json_decode($json,true);
foreach($items as $value){
if($value['item_id']==$item_id){
echo $value['item_title'].PHP_EOL;
}
}
Output:- https://3v4l.org/7oPHk

Answer 2

Some explanation: you should use foreach loop with if condition
Here is the sample code
<?php
$json='[
{
"item_id": "342",
"item_title": "James"
},
{
"item_id": "374",
"item_title": "Fred"
}
]';
$item_id = 374;
$items = json_decode($json);
//print_r($items);
foreach($items as $value){
if($value->item_id==$item_id){
echo $value->item_title;
}
}
You can check the desired output here