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How PHP scripts are executed?
Until version 3, PHP source code was parsed and executed right away by the PHP interpreter. PHP 4 introduced the the Zend engine. This engine splits the processing of PHP code into several phases. The first phase parses PHP source code and generates a binary representation of the PHP code known as Zend opcodes.
Is PHP scripts are executed on the server?
Summary. PHP is a server side scripting language. This means that it is executed on the server. The client applications do not need to have PHP installed.
How do you execute a PHP file?
Open up any Web browser on your desktop and enter “localhost” into the address box. The browser will open a list of files stored under the “HTDocs” folder on your computer. Click on the link to a PHP file and open it to run a script.
What does PHP run on?
PHP runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.) PHP is compatible with almost all servers used today (Apache, IIS, etc.)
Does PHP run in browser?
PHP Is Not Part of Your Browser. And here’s where things change from the easy, browser-centric view of the world. When you download a web browser, you get HTML, CSS, and JavaScript, but you do not get PHP. PHP scripts—which you’ll soon be writing—have to be interpreted by the PHP interpreter program, called php.
Where can you run PHP?
A PHP code will run as a web server module or as a command-line interface. To run PHP for the web, you need to install a Web Server like Apache and you also need a database server like MySQL. There are various web servers for running PHP programs like WAMP & XAMPP.
Is PHP server-side only?
PHP is mainly focused on server-side scripting, so you can do anything any other CGI program can do, such as collect form data, generate dynamic page content, or send and receive cookies. But PHP can do much more. There are three main areas where PHP scripts are used.
Where do I write PHP files?
PHP Write to File – fwrite() The fwrite() function is used to write to a file. The first parameter of fwrite() contains the name of the file to write to and the second parameter is the string to be written.
Is PHP run on server or client?
That is, PHP is a server side language – it runs on the server and its interaction with the client is limited to sending it a web page.
Does PHP run on client or server-side?
server-side
PHP is a server-side scripting language designed to be used for web purposes.
Which server is used for PHP?
PHP support can be added to a number of web servers (IIS, Xitami, and so on), but most commonly Apache HTTP Server is used.
How do you write PHP script?
How to create a PHP script
- Line 1 – This tag tells the server that you are writing PHP code.
- Line 2 – You can use the echo function to print out a string of text, this will be displayed back when the script is run.
- Line 3 – This tag tells the server that you have stopped writing PHP code.
How to execute a PHP script from a specific file?
Tell PHP to execute a certain file. Both ways (whether using the -f switch or not) execute the file my_script.php. Note that there is no restriction on which files can be executed; in particular, the filename is not required have a .php extension. Pass the PHP code to execute directly on the command line.
What is the PHP executable used for?
The PHP executable can be used to run PHP scripts absolutely independent of the web server. On Unix systems, the special #! (or “shebang”) first line should be added to PHP scripts so that the system can automatically tell which program should run the script.
How do PHP scripts get loaded?
Basically, each time a PHP script is loaded, it goes by two steps : The PHP source code is parsed, and converted to what’s called opcodes Kind of an equivalent of JAVA’s bytecode
Why do PHP scripts have a special first line?
On Unix systems, the special #! (or “shebang”) first line should be added to PHP scripts so that the system can automatically tell which program should run the script. On Windows platforms, it’s possible to associate php.exe with the double click option of the .php extension, or a batch file can be created to run scripts through PHP.