Comparing values, finding largest one.

I'm not sure of the best way to go about doing this.

I have 4 values ($strings) and must set a fifth value to the highest numerical value of the 4 preceding. I'm not sure if I should put them in to an array and then find the highest number in that array, or if there is a simpler method.

For reference the values are:
$rtl
$rtr
$rbr
$rbl

and the largest number of those values will be set to $sz


Thank you an advance for your help.

 

I would do this:

$sz = 0;
if ( $rtl > $sz ) $sz = $rtl;
if ( $rtr > $sz ) $sz = $rtr;
if ( $rbr > $sz ) $sz = $rbr;
if ( $rbl > $sz ) $sz = $rbl;

PHP:

 

Thank you for your reply. I did end up finding a solution though.

$sz = max($rtl, $rtr, $rbr, $rbl);

PHP:

 

That's cool. Learn something new everyday.