php convert json string to array

Question

I have a json string sent from html...

[{"user_id":"test_123"},{"id":"wallName","value":"","type":"text"},{"id":"wallLength","value":"","type":"text"}]

I want to retrieve the "user_id":"test_123" and then from that create a folder named test_123, maybe even a matching file named test_123. I'm thinking I need to convert the json file to an array, get the user_id value and convert that back to a string? Does that make sense or am I over complicating this? I'm new to php so that might very well be the case.

Here's my php code...

<?php
 $json=$_POST[json];
 $decodedText=html_entity_decode($json);
 $myArray = json_decode($json, true);
 if (json_decode($json) != null){ 
 $file=fopen('user_data.json','w+');
 fwrite($file, $json);
 fclose($file);
 }else{
 echo "empty";
 }
?>

When I try to access $myArray it doesn't work.

• Parth Chavda: json_decode($json) convert your json to object may be...
• Parth Chavda: $array = (array) json_decode($json) ; try this may be it's help you
• JoMojo: @ParthChavda Thanks for the suggestions, how woould I access the array if I want 'test_123'? I'm having a hard time figuring that part out. I would think $array[0] would work but it doesn't seem to
• jayxhj: 3v4l.org/T7Y9t
• Parth Chavda: you can get using $myArray[0]['user_id']

Answer 1

you can get user_id using $myArray[0]['user_id'];