How do I resolve the error "PHP Notice: Use of undefined constant"?

Question

I have a strange error message after using the post to wall function. It did successfully post to the wall however i got a very weird strange error.

[30-Jan-2012 23:36:49] PHP Notice: Use of undefined constant message - assumed 'message' in C:\www\jetstar\starpick\rewards.php on line 33

[30-Jan-2012 23:36:49] PHP Notice: Use of undefined constant picture - assumed 'picture' in C:\www\jetstar\starpick\rewards.php on line 34

[30-Jan-2012 23:36:49] PHP Notice: Use of undefined constant link - assumed 'link' in C:\www\jetstar\starpick\rewards.php on line 35

[30-Jan-2012 23:36:49] PHP Notice: Use of undefined constant name - assumed 'name' in C:\www\jetstar\starpick\rewards.php on line 36

[30-Jan-2012 23:36:49] PHP Notice: Use of undefined constant caption - assumed 'caption' in C:\www\jetstar\starpick\rewards.php on line 37

This is the codes i use

$facebook->api("/me/feed", "post", array(
    message => "I have won a ".$prizename,
    picture => "http://i1172.photobucket.com/albums/r574/092810c/starpicklogo-1.png",
    link => "https://apps.facebook.com/starpick/",
    name => "StarPick",
    caption => "Stand to Win Attractive Prizes!!!"));

The answer is short: By understanding the error message. Which actually contains the solution if you read it carefully. — hakre, Jan 30 '12 at 15:47
i think you should use $message,$picture etc or variable as u define. — Divyesh Jesadiya, Jul 31 '15 at 06:05

score 9 · Answer 1 · answered Jan 30 '12 at 15:43

9

You've forgotten quotes around your key names:

'message' => "I have won a ".$prizename,
^-------^--- missing

and the same for all the other parts of your array.

Keys in PHP MUST be quoted, otherwise they're assumed to be constants. PHP will politely treat undefined constants as unquoted strings, but will give you those warnings.

answered Jan 30 '12 at 15:43

Marc B

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Oh thanks so much , i guess i overlook it – user1175105 Jan 30 '12 at 15:47

score 0 · Answer 2 · answered Jan 30 '12 at 15:44

The array keys should be put in quotes as well.

The good code is:

$facebook->api("/me/feed", "post", array(
"message" => "I have won a ".$prizename,
"picture" => "http://i1172.photobucket.com/albums/r574/092810c/starpicklogo-1.png",
"link" => "https://apps.facebook.com/starpick/",
"name" => "StarPick",
"caption" => "Stand to Win Attractive Prizes!!!"));

How do I resolve the error "PHP Notice: Use of undefined constant"?

2 Answers2