The Next Big Thing in php getenv
- October 31, 2021
I have a couple of servers running in my office that are using PHP (PHP) to get environment variables. These variables are used by a number of other scripts and databases running on my servers. My goal each day is to look at all of the environment variables that I am using and make sure that I am using them properly.
To be honest, I get bored of that task as often as I do of keeping track of my servers’ various server-related variables. I end up just looking at the variable names and just wondering why I didn’t think to include them in my scripts.
I don’t know if this is the norm in PHP, but it seems that PHP does this to a certain extent. At one point there was a problem with a client that wanted to know all of the available variables to be able to set a variable. I was able to find all of the ones that the client wanted, and set one of them to be a blank variable.
The reason I’m mentioning this is because php is notoriously bad at keeping track of all the server-related variables.
This is a problem that exists in almost all programming languages. There are times when you need to have all of the variables you need to make a certain statement available, but not all of them, so you need to go find all of the other ones and set a different one. This is a problem that can occur in PHP as well. To be fair, this is a problem that exists in almost all programming languages.
If you need your variables to be available to a script, PHP includes a function called getenv. This function allows you to get a list of all of the variables in your machine (in other words, the variables inside the PHP interpreter) and make them available to your code. This is great, but of course if you forget to include this function in your code, then you can still use the variables later on in the code.
I mean this is a problem that might not be a problem at all. But a lot of people forget to include this function and then it can cause issues. PHP has a built-in way to get the list of all the variables, but it is much more convenient to have an external function call it for you. This function can also be used to retrieve the list of variables for an external file, which is really handy.
This function is a great way to retrieve variables that are being stored in a file. For example, if you have a file named php.php inside your project directory, you can call the function like this: $var = getenv(‘php_var’) for example. It will retrieve the value of the variable stored in the php.php file and put it in the $var variable, which you can then use in other files.
To find out what variables are stored in a file, simply do this: php getenv.