How to Parse JSON with PHP? - php

Question

I can do a var_dump, but when trying to access the values, I am getting errors about the values not being found.
{
"metrics": {
"timers": [
{
"name": "com.android.timer.launchtime",
"startTime": 1232138988989,
"duration_ms": 1900
},
{
"name": "com.android.timer.preroll-load-time",
"startTime": 1232138988989,
"duration_ms": 1000
}
]
}
}
I used the following so far to try and parse it.
$json_file = file_get_contents('test.json');
$json_a = json_decode($json_file,true);
var_dump(json_decode($json_file)); //This works
echo $json_a['name']; //I want to print the name of each (from timers).

Answer 1

Try:
$yourDecodedJSON = json_decode($yourJson)
echo $yourDecodedJSON->metrics->timers[0]->name;
Or you can:
$yourDecodedJSON = json_decode($yourJson, true); // forces array
echo $yourDecodedJSON['metrics']['timers'][0]->name;
In your case, you may want to..
foreach($yourDecodedJSON['metrics']['timers'] as $timer){
echo $timer['name']; echo $timer['duration_ms']; // etc
}
If something fails, use:
echo json_last_error_msg()
To troubleshoot further

Answer 2

You need do it in following manner:-
<?php
$data = '{
"metrics": {
"timers": [
{
"name": "com.android.timer.launchtime",
"startTime": 1232138988989,
"duration_ms": 1900
},
{
"name": "com.android.timer.preroll-load-time",
"startTime": 1232138988989,
"duration_ms": 1000
}
]
}
}';
$new_array = json_decode($data); //convert json data into array
echo "<pre/>";print_r($new_array); //print array
foreach ($new_array->metrics->timers as $new_arr){ // iterate through array
echo $new_arr->name.'<br/>'; // rest you can do also same
}
?>
Output:- https://eval.in/407418