1. Using if () { }

if ($value) {

}

Examples:

<?php if () { ?>
 	 	 
 // stuff here
 	 	 
<?php } ?>

<?php if ( is_active_sidebar( 'welcome' ) ) { ?>
			
	<div class="welcome-widget">
		<?php dynamic_sidebar( 'welcome' ); ?>
	</div>
							
<?php } ?>

2. Alternate syntax using if () : endif;

if ($value):

endif;

Examples:

<?php if (): ?>
 	 	 
 // stuff here
 	 	 
<?php endif; ?>

<?php if ( is_active_sidebar( 'welcome' ) ): ?>
			
	<div class="welcome-widget">
		<?php dynamic_sidebar( 'welcome' ); ?>
	</div>
							
<?php endif; ?>

 3. The Ternary Operator    ? :

Basic Form:

<?php
$outcome = ( 2 + 2 = 4 ) ? "The statement is TRUE" : "The statement is FALSE";

Example:

<?php
$greeting = ($name = Steve) ? "Good to see you again, Steve!" : "Hi, what's your name?";