Variable in PHP
Variables are used to store data, like strings of text, numbers, etc. Variable values can change over the course of a script. Here're some important things to know about variables: 1) In PHP, a variable does not need to be declared before adding a value to it. PHP automatically converts the variable to the correct data type, depending on its value. 2) After declaring a variable it can be reused throughout the code. 3) The assignment operator ( = ) used to assign value to a variable. In PHP variable can be declared as: $var_name = value; <?php // Declaring variables $txt = "Hello World!" ; $number = 10 ; // Displaying variables value echo $txt ; // Output: Hello World! echo $number ; // Output: 10 ?> In the example, we have created two variables where the first one has been assigned with a string value and the second has been assigned with a number. Later we displayed the values of the variables in the browser using the echo statement. T...