I need a URL for a paypal donation with the purpose field pre-populated

I need a URL for a paypal donation with the purpose field pre-populated.

I want to have a URL for paypal DONATIONS that can have default text for the "purpose" field in the URL so that when the user clicks on it and is presented with the donation page, that field will be pre-populated with my designated text.

How can I do this?  What would that URL look like?
cashonlyAsked:
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
I assume you're POSTing data, correct? Below is a list of the fields that can be passed

https://www.paypal.com/cgi-bin/webscr?cmd=_pdn_xclick_prepopulate_outside

You can try adding the purpose field in that code as well, just add the html equivalent name to the list of hidden fields
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cashonlyAuthor Commented:
Don't know about POSTing, I'm just creating a link that can be on a facebook post that someone can click on.

How EXACTLY is the field passed in?
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
I assumed you were creating a form and sending the data the way...

I was able to find the lit of variables (see link below) that can be used. Do a Ctrl-F on the page and search for "service" and that may give you direction.

https://developer.paypal.com/docs/classic/paypal-payments-standard/integration-guide/Appx_websitestandard_htmlvariables/

can you give an example of the link (take out the domain name) you have so far?
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cashonlyAuthor Commented:
This is what I use now:
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=WWJSGZXPU2DL4
(feel free to donate if you like hahahaha!)

It takes the user to the donation page, but I would like to somehow pass in some text that will populate the "Purpose" field.

Any ideas?
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
if you look at the html source, the purpose field is called "item_name", so maybe something like this:

https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=WWJSGZXPU2DL4&item_name=abcdef

actually, I just tried it and it worked, as long as you don't want the field to be editable...
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cashonlyAuthor Commented:
Hmmmm... that is good, but I think I need it to be editable, unless I can figure out how to put another field on that donation page where they can enter free form text.
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
I don't think you can make it editable, you're better off going into PayPal and adding an option free text field
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cashonlyAuthor Commented:
OK,

I tired adding an option field by putting this in the advanced items box:
on1=Photonum

Then, I added this to the end of that URL:  &Photonum=1234

And while the word "Photonum:" showed up, the 1234 didn't show up anywhere.

If I put the following in the advanced items box:
on1=Photonum
os1=1234

Then the 1234 did show up after the word Photonum

I need a way to pass something in so I can see it when I look at the donation.  Any ideas?
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
I don't see any other field on the form, did you take it out?

this seems to be getting away from the original purpose of this question, which is to pre-populate the PURPOSE field, which we did. I'm not extremely familiar with building paypal forms, you may want to close this question down and ask a fresh one so that it gets some new eyes on it, or we can continue to try to piecemeal a solution for you, I'm fine either way.
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cashonlyAuthor Commented:
Good point.  I'll do that.  You've been a big help.
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cashonlyAuthor Commented:
You've been very helpful, thank you!
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Big MontySenior Web Developer / CEO of ExchangeTree.org Commented:
my pleasure! happy programming!
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