PHP Interview Master

PHP (Hypertext Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded i...

Rasmus Lerdorf created PHP in 1994.

Originally, PHP stood for 'Personal Home Page', but it now stands for the recursive acronym 'PHP: Hypertext Preprocessor'.

You can use the PHP CLI (Command Line Interface). Simply open a terminal and type: `php script.php`.

php script.php

PHP code is usually enclosed in `<?php ... ?>`. Short open tags `<? ... ?>` are also available but generally not recommended for portability.

PHP supports single-line comments using `//` or `#`, and multi-line comments using `/* ... */`.

// Single line
# Also single line
/* 
  Multi-line
*/

Variables are used to store data, like text strings, numbers, or arrays. In PHP, all variables must be prefixed with a dollar sign (`$`).

Yes, variable names in PHP are case-sensitive. `$Name` and `$name` are two different variables. (Note: Keywords, classes, and function names are NOT case-sensit...

Common data types include Integer, Float (Double), String, Boolean, Array, Object, NULL, and Resource.

You use the dot (`.`) operator to concatenate strings.

$str1 = 'Hello';
$str2 = ' World!';
echo $str1 . $str2; // Outputs: Hello World!