How to extract value from stdClass string?

Question

I am getting string after performing some queries in database like

 objectString = 'O:8:"stdClass":1:{s:5:"$date";O:8:"stdClass":1:{s:11:"$numberLong";s:13:"1546297200000";}}

I want to get $numberLong value from stdClass string. I have tried

      var dateObj = new Date(objectString.$date.$numberLong - 1000);

It throws error message at this line

"Uncaught TypeError: Cannot read property '$numberLong' of undefined at getDateStringObject"

Please help !!!

This looks like a PHP question by the looks of it. Mind if we update the tags? — DeadLock, Jun 18 '18 at 11:13
Due to some complex reason I managed to convert stdclass object as string... now i want to extract $numberLong value — Nida Amin, Jun 18 '18 at 11:15

Jim Wright · Answer 1 · 2018-06-18T13:04:36.710

1

This looks like a serialised stdObject. If you are getting this value from PHP at any point I would suggest unserializing it before returning it back to the javascript.

If done correctly you would be able to access the date as follows:

var dateObj = new Date(object.date.numberLong - 1000);

If you can't use PHP to unserialise the object, then you could use regex to match the value like so:

var objectString = 'O:8:"stdClass":1:{s:5:"$date";O:8:"stdClass":1:{s:11:"$numberLong";s:13:"1546297200000";}}'
var pattern = /("\$numberLong")(.+)("\d+")/g
var match = pattern.exec(objectString);
console.log(match[3]);

edited Jun 18 '18 at 13:04

answered Jun 18 '18 at 11:18

Jim Wright

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How do i unserialize javascript variable inside script tag – Nida Amin Jun 18 '18 at 12:00
I'm not sure you can unserialise it in javascript. – Jim Wright Jun 18 '18 at 12:57
I have added a regex option to the answer. – Jim Wright Jun 18 '18 at 13:05

score 0 · Answer 2 · answered Jun 18 '18 at 11:19

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objectString looks like a serialized object (see PHP serialize).

You will need to unserialize it into a PHP object in order be able to use it's properties (like $numberLong)

You can take a look at How to use php serialize() and unserialize() for somewhat of a simple explanation.

answered Jun 18 '18 at 11:19

DeadLock

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How do i call php unserialize function and pass javascript variable "objectSting" as a parameter inside – Nida Amin Jun 18 '18 at 12:03
Your problem looks like a combination of this question and the one you ask here - https://stackoverflow.com/questions/50906080/javascript-stops-working-after-php-tag. Do you want the answer here or on that question? – DeadLock Jun 18 '18 at 12:10
There is already and answer there that should help. - Do what is recommended there. Update your code to this - $("#session_start_date").val(getDateString()); – DeadLock Jun 18 '18 at 12:12
You will need to do 1 more thing. In the javascript function `getDateString`, you will also need to do this - `str = JSON.parse(str); `. This will convert the string to a javascript object that you can use to fetch the `date` and `longNumber` values. – DeadLock Jun 18 '18 at 12:16

How to extract value from stdClass string?

2 Answers2