PHP Variables
PHP Variables
In PHP, variables are used to store and manipulate data. A variable is a container that holds a value, which can be of any data type, such as a string, integer, float, boolean, array, object, or null.
To create a variable in PHP, you need to use the $ sign followed by the variable name. Here’s an example:
$name = "John";
$age = 30;
$height = 1.75;
$is_student = true;
In this example, $name is a string variable that holds the value “John”, $age is an integer variable that holds the value 30, $height is a float variable that holds the value 1.75, and $is_student is a boolean variable that holds the value true.
You can also assign the value of one variable to another variable, like this:
$var1 = 10;
$var2 = $var1;
In this example, $var2 will hold the same value as $var1, which is 10.
PHP also supports variable interpolation, which allows you to embed variables in strings. To do this, you need to enclose the variable name in curly braces, like this:
$name = "John";
echo "Hello, {$name}!";
This will output “Hello, John!”.
Variables in PHP are case-sensitive, which means that $name and $Name are considered to be two different variables. It’s also important to note that variable names in PHP must start with a letter or underscore, and can only contain letters, numbers, and underscores.