PHP offers an alternative syntax for some of its control
    structures; namely, if,
    while, for,
    foreach, and switch.
    In each case, the basic form of the alternate syntax is to change
    the opening brace to a colon (:) and the closing brace to
    endif;, endwhile;,
    endfor;, endforeach;, or
    endswitch;, respectively.
    
   
    In the above example, the HTML block "A is equal to 5" is nested within an
    if statement written in the alternative syntax.  The
    HTML block would be displayed only if $a is equal to 5.
   
    The alternative syntax applies to else and
    elseif as well.  The following is an
    if structure with elseif and
    else in the alternative format:
    
   
    See also while,
    for, and if for further examples.