PHP：获取变量中的最高和最低值

Question

Is their any way to get the highest and lowest value among variables?

example is that i have this variables

$val1 = 10
 $val2 = 20
 $val3 = 30
 $val4 = 40
 $val5 = 50

and among this variable i want to display or put to another variable the variable that has the highest and lowest value. just like below.

$highval = $val5; 
$lowval = $val1;

$val5 in $highval coz it has the value of 50 and $val1 in $lowval coz it has the value of 10 .

thanks

Answer 1

When you are comparing a list of values, it's the best to store them in an array.

Try this:

$val1 = 10;
$val2 = 20;
$val3 = 30;
$val4 = 40;
$val5 = 50;

$arr = compact('val1','val2','val3','val4','val5');  // Stores values in array $arr
$highval = max($arr); // 50
$lowval  = min($arr);  // 10