Find greatest of three values in PHP

With three numbers, $x , $y , and $z , I use the following code to find the greatest and place it in $c . Is there a more efficient way to do this?

$a = $x;
$b = $y;
$c = $z;
if ($x > $z && $y <= $x) {
    $c = $x;
    $a = $z;
} elseif ($y > $z) {
    $c = $y;
    $b = $z;
}

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Probably the easiest way is $c = max($x, $y, $z) . See the documentation on max Docs for more information, it compares by the integer value of each parameter but will return the original parameter value.

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You can also use an array with max.

max(array($a, $b, $c));

if you need to

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更简单的一个

<?php
$one = 10;
$two = 20;
$three = 30;
if ($one>$two)
{
   if($one>$three)
      {echo "one is the greatest";}
   else
      {echo "three is the greatest";}
 }
else
{
if ($two>$three)
    {echo "two is the greatest";}

else
    {echo "three is the greatest";}
} 

?>        

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