You do not need a web server to execute PHP script unless you need to run it using a browser. Install PHP in your operating system and include PHP path in your environment path or variable (depending on what OS) you are using. If you are just using the script for the mailing stuff from your own computer, you don't need a web server like apache, you just need PHP and its cli program installed and you be run php scripts directly. Google the web how on how run PHP command line. Or visit this official documentation link: http://php.net/manual/en/features.commandline.php
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You do not need a web server to execute PHP script unless you need to run it using a browser. Install PHP in your operating system and include PHP path in your environment path or variable (depending on what OS) you are using. If you are just using the script for the mailing stuff from your own computer, you don't need a web server like apache, you just need PHP and its cli program installed and you be run php scripts directly. Google the web how on how run PHP command line. Or visit this official documentation link: http://php.net/manual/en/features.commandline.php
You need to download a server, and install it. If you want to go to the trouble, you can get XAMPP, and once it's installed, move the PHP file to the root of your installation (usually c:\xampp\htdocs\ on windows) and then use the url localhost/script.php in your browser.
php have a easy way to run a light server:
first cd into php file directory, then
php -S 127.0.0.1:8000
then you can run php
You have to run a web server (e.g. Apache) and browse to your localhost, mostly likely on port 80.
What you really ought to do is install an all-in-one package like XAMPP, it bundles Apache, MySQL PHP, and Perl (if you were so inclined) as well as a few other tools that work with Apache and MySQL - plus it's cross platform (that's what the 'X' in 'XAMPP' stands for).
Once you install XAMPP (and there is an installer, so it shouldn't be hard) open up the control panel for XAMPP and then click the "Start" button next to Apache - note that on applications that require a database, you'll also need to start MySQL (and you'll be able to interface with it through phpMyAdmin). Once you've started Apache, you can browse to http://localhost.
Again, regardless of whether or not you choose XAMPP (which I would recommend), you should just have to start Apache.