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Here are some Php beginner's tips:
Single or double quoted strings ?
Not sure whether you should use a single or a double quoted string ? If you don't use special characters such as newlines or variable expansion in your string then use single quotes. Why ? If Php does not need to look for any special characters or variables to expand Php can parse your single quoted string faster.
Modifying an array in a loop
When you use foreach for modifying an array in a loop make sure you use an ampersand (&) for the loop variable:
foreach ($yourarray as &$modifyit) {
$modifyit = $anothervar;
}
If you don't use the ampersand the array elements are passed to the foreach loop by value and they won't be modified.
Session parameters from your local webserver.
When I tried to pass session parameters for the first time, using $_SESSION, I could not get it working at all. What I did was opening another url and pass a session id as a html parameter. I was developing with a webserver installed locally. I had configured my PC such that the website, e.g. http://localfactsandpeople.com, was mapped to my local webserver. For the webserver this url was the same as http://localhost/localwebsites/localfactsandpeople. I tried to pass a session id in the url http://localfactsandpeople.com/page.php to a new page using the following url: http://localhost/localwebsites/localfactsandpeople/newpage.php?sessionid=mysession. I was trying to retrieve the session variable in newpage.php like this:
$mysession = $_GET('sessionid');
$passthisvariable = $_SESSION[$mysession]['passthis'];
However it did not work: I could extract the session id but I could not read the session variable in newpage.php. When I changed the url to http://localfactsandpeople.com/newpage.php?sessionid=mysession I was able to use the session id in newpage.php. What I learned is that php sessions do not work across different domains.
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