Parsing JSON blob dump in HTTP POST in PHP

Question

one of the application is sending a webhook callback as HTTP Post, from which I need to parse a JSON blob dump (custom_fields in the below URL). Here is one such POST from a server application:

http://localhost/webhook/?unit_price=0.00&currency=Free&buyer_name=Shivraj&payment_id=34565c17000F04251234&custom_fields=%7B%22Field_87630%22%3A+%7B%22value%22%3A+%22uname1%22%2C+%22label%22%3A+%22user_name%22%2C+%22required%22%3A+%22on%22%2C+%22type%22%3A+%22char%22%7D%2C+%22Field_63520%22%3A+%7B%22value%22%3A+%221234%22%2C+%22label%22%3A+%22auction_id%22%2C+%22required%22%3A+true%2C+%22type%22%3A+%22char%22%7D%2C+%22Field_76855%22%3A+%7B%22value%22%3A+%22tx1%22%2C+%22label%22%3A+%22tx_type%22%2C+%22required%22%3A+%22on%22%2C+%22type%22%3A+%22char%22%7D%7D&amount=10.00&fees=0.00&status=Credit&quantity=1

In my code:

$custom_fields= json_decode($_REQUEST['custom_fields'], true);
$f1 = $custom_fields['Field_63520']['value'];
$f2 = $custom_fields['Field_87630']['value'];
$f3 = $custom_fields['Field_76855']['value'];

I get error/warning,

PHP Warning:  Illegal string offset 'Field_63520' in webhook.php on line 70
PHP Warning:  Illegal string offset 'value' in webhook.php on line 70
...
f1:{
f2:{
f3:{

when I print the $custom_fields, I get:

{\"Field_87630\": {\"value\": \"uname1\", \"label\": \"user_name\", \"required\": \"on\", \"type\": \"char\"}, \"Field_63520\": {\"value\": \"1234\", \"label\": \"auction_id\", \"required\": true, \"type\": \"char\"}, \"Field_76855\": {\"value\": \"tx1\", \"label\": \"tx_type\", \"required\": \"on\", \"type\": \"char\"}}

I am kind of stuck here without knowing how to proceed. Any suggestions would help. Thanks.

please print your decoded array.

siddhesh
– siddhesh

2015-12-19 09:54:48 +00:00
Commented Dec 19, 2015 at 9:54 — siddhesh
– siddhesh, Commented Dec 19, 2015 at 9:54

Hardik Solanki · Accepted Answer · 2015-12-19 10:05:26Z

1

You have to remove backslash from your JSON data. Use stripslashes() function to remove backslash

Your code should be :

<?php
$custom_fields = json_decode(stripslashes($_REQUEST['custom_fields']),true);
$f1 = $custom_fields['Field_63520']['value'];
$f2 = $custom_fields['Field_87630']['value'];
$f3 = $custom_fields['Field_76855']['value'];
?>

answered Dec 19, 2015 at 10:05

Hardik Solanki

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