Does PHP or JavaScript execute first?

Pragmatically speaking, this is the typical order: PHP runs first and constructs the page. The browser loads the resulting HTML (any JavaScript found gets executed immediately) Any JavaScript that was tied to the DOM ready or load event gets executed once the whole HTML is read and all objects are loaded respectively.

Which is faster JavaScript or PHP?

The comparison between PHP vs JavaScript ends with the score 3 to 5 – JavaScript beats PHP. Both languages are fairly good in terms of community support, extensibility, and apps they are suited to. JavaScript is certainly more efficient in terms of speed and universality.

How is a PHP script executed?

If the web server determines that the request is for a PHP file (often index. php ), it’ll pass that file to the PHP interpreter. The PHP interpreter will read the PHP file, parse it (and other included files) and then execute it. The web server will take that output and send it back as a response to the browser.

Which is more powerful JavaScript or PHP?

But after V8, Node and other frameworks came, Javascript is capable of doing a lot of things Php used to. Since we can handle both front-end and back-end through Javascript now, It’s considered as more powerful than PHP. JavaScript: It is the most popular lightweight, interpreted compiled programming language.

Does PHP execute in order?

When PHP reads a file, it compiles it to bytecode (compile time), then executes it (execution time / runtime). Unconditional function declarations are read at compile time, so that functions are already known when your code is executed.

Where does PHP get executed?

PHP is written as standard text files with the . php extension. PHP files are often saved within a folder in a web server’s public directory (or a web root directory). On most systems this will either be named public or public_html .

Should I use PHP or JavaScript?

Conclusion. Even though Javascript can be successfully used for both front-end and back-end development with the help of such platforms as Node. js, PHP still remains a better tool for the back-end. In fact, the best idea would be to combine both — PHP and Javascript — in order to build a robust dynamic web application …

Can JS replace PHP?

js a new language which can replace PHP or it is a language which can/only compliment/supplement PHP and other web languages to perform complex task? Short answer: Yes. You can replace all server-side Php with server-side Javascript.

Is it possible to run PHP code from JavaScript?

Javascript is run by the browser (client) and php is run on the remote server so you cannot just run php code from js. However, you can call server to run it for you and give the result back without reloading of the page. Such approach is called AJAX – read about it for a while.

How does a PHP script work?

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. If you want to see what those look like, you can use the VLD extension. Then, those opcode are executed.

Is PHP more stable than JavaScript?

Unlike JavaScript, PHP is synchronous. The second line of code in PHP cannot be executed until the first one is, which makes it much slower than JavaScript. While PHP undoubtedly loses in terms of speed, some say that it is more stable than JavaScript. Yet, this advantage is quite ambiguous and not a hundred percent proven.

What is hypertext pre-processor PHP?

PHP stands for Hypertext pre-processor, and it is a server end scripting platform. the major goal of PHP design is allowing web developers to build dynamically executed web pages. Brenden Eich was the inventor of the Javascript language.