PHP Conditionals

This page teaches you about PHP conditionals.

Conditionals are statements which tests for a certain condition, then does one thing if a certain condition is met, another thing if another condition is met, or something else if any condition is not met. The 3 main conditionals in PHP are if, else, and elseif. The syntax for a conditional is below.

IF statement

Syntax if (condition)
if condition is true then do this;

PHP page


	<html> <head> <title>HTML tutorial</title> </head> <body> <?php $name="dave"; if ($name=="dave") echo "Hi Dave."; ?> </body> </html>

This is how it looks


	Hi Dave.

ELSE statement

PHP page


	<html> <head> <title>HTML tutorial</title> </head> <body> <?php $name="dave"; if ($name=="brian") echo "Hi Brian."; else echo "You aren't dave."; ?> </body> </html>

This is how it looks


	You aren't Dave.

ELSEIF statement

Syntax if (condition)
if condition is true then do this;
elseif
if condition is false then do this;
else
if condition is false then do this;

PHP page


	<html> <head> <title>HTML tutorial</title> </head> <body> <?php $name="joe"; if ($name=="dave") echo "Hi Dave."; elseif ($name=="brian") echo "Hi Brian."; else echo "You aren't Dave or Brian."; ?> </body> </html>