RE: [PHP-WEBMASTER] Information

-----Original Message----- From: parasane@gmail.com [mailto:parasane@gmail.com] On Behalf Of Daniel P. Brown Sent: Wednesday, June 22, 2011 4:13 PM To: Donnell, Jason Cc: php-webmaster@lists.php.net Subject: Re: [PHP-WEBMASTER] Information On Wed, Jun 22, 2011 at 15:48, Donnell, Jason <Jason.Donnell@fmcti.com> wrote: > Hello, > > > > I recently resolved an issue that I was having with a server side > script.  It is a rather simple resolution, but can cause hours of > frustration and some additional comments added to the manual might be > extremely advantageous to other developers.  I apologize in advance if > the manual does state this, however I have triple checked the online PHP > manual and I cannot find any information on exactly what I am going to > describe. > > > > The manual does describe how to pass variables from JavaScript to PHP > server side script and to different PHP functions.  There is one > important short note that is worth mentioning - Variables obtained using > the $_Get method shall be passed to other functions by reference only. > My theory is that since the variable is linked to the URL, and we all > know that the URL is not changing unless you navigate to another page, > then the variable cannot change either which means it shall be passed by > reference only.  I have found, through experience that the variable > becomes "undefined" if it is passed by value to a function from the main > PHP script. > > > > Here is an example of what I am saying: > > > > $id = $_get['ID']; //obtained from JavaScript > > ..... > > Foo($id); //call function > > > > Function Foo($id) //invalid, id now is 'undefined' > > { > > } > > Function Foo(&$id) //valid > > { > > } Part of the problems you're experiencing - unless it's a mere typo - may be due to the fact that you've referenced both $_Get in speaking, and $_get in your code example. Unless you've defined this array yourself, it does not exist --- the PHP superglobal used for storing HTTP GET data is $_GET. It is cAsE-sEnSiTiVe, as are all variables. -- </Daniel P. Brown> Dedicated Servers, Cloud and Cloud Hybrid Solutions, VPS, Hosting (866-) 725-4321 http://www.parasane.net/ Yes, I am using $_GET (the PHP superglobal). That was a typo and I just did not use the correct case when typing this email. I am able to pass variables from PHP to my PHP server script using $_GET. It's just that once I pass the variable to the function, the variable suddenly becomes 'undefined'. I know this is strange, but the only way I could fix this problem was to pass the variable by reference. I don't need to pass all variables by reference, just the ones that I obtained via the $_GET function I must pass by reference. -Jason