PHP Expressions:

In every language expression plays a vital role, in PHP whatever you write is an expression (almost anything). Anything has a value is an expression and this is the easiest way to define and understand expression.

Variables and constants make an expression,

$var=323;

In the above example $var is a variable and 323 is a constant value.

Following examples will try to make the concepts more clear, hopefully you have the concept of  Expression functions in PHP:

PHP Regular Expression Example:

function disp()

$a=23;

return $a;

echo disp();

Output:

23

Example:

function disp()

echo $a=23;

Output:

23

Related Tags for PHP Expression: