Get the lowest variable in an array

Question

I need to get the lowest among the values of 5 variables.

I want that if a variable is not set or it is empty, the script must exclude this variable from the results.

$var1='17';
$var2='19';
$var3='20';
$var4='1';
$var5='';

$arr = compact('var1','var2','var3','var4','var5');  // Stores values in array $arr

$highval = max($arr);
$lowval  = min($arr);
$stores=count(array_filter($arr));

echo 'Item is available in '.$stores.' vars and is between '.$lowval.' and '.$highval.'';

For example assigning $var4='', the lowest value would be $var1 and not $var4. There can also be multiple variables as not set or empty.

How would you edit the script above to accomplish it?

Why not just define an array instead of making your code bloated? — Script47, Jul 12 '18 at 11:20
If your variable names end in numbers, you're using the wrong variables. — iainn, Jul 12 '18 at 11:21
Possible duplicate of [Remove empty array elements](https://stackoverflow.com/questions/3654295/remove-empty-array-elements) — MrSmile, Jul 12 '18 at 11:23

Lovepreet Singh · Answer 1 · 2018-07-12T11:35:01.683

If you are using array_filter to show count, then you can use it before min/max. The code should like:

<?php    
    $var1 = '17';
    $var2 = '19';
    $var3 = '20';
    $var4 = '1';
    $var5 = '';

    $arr = compact('var1', 'var2', 'var3', 'var4', 'var5');  // Stores values in array $arr
    $filtered = array_filter($arr);
    $highval = max($filtered);
    $lowval = min($filtered);
    $stores = count($filtered);

    echo 'Item is available in ' . $stores . ' vars and is between ' . $lowval . ' and ' . $highval . '';

UPDATE

It would be better if you take array of numbers and write it like:

$arr = ['17', '19', '20', '1', ''];
$filtered = array_filter($arr);
$highval = max($filtered);
$lowval = min($filtered);
$stores = count($filtered);

echo 'Item is available in ' . $stores . ' vars and is between ' . $lowval . ' and ' . $highval . '';

R P · Answer 2 · 2018-07-12T12:10:55.893

$arr have String values in the array so need to convert in number then your problem will solve.

Add line : $arr = array_map('intval', $arr); line for convert in number.

Try this:

$var1='17';
$var2='19';
$var3='20';
$var4='1';
$var5='';

$arr = compact('var1','var2','var3','var4','var5');  // Stores values in array $arr
$arr = array_map('intval', $arr);
$arr1 = array_filter($arr, function($a) { return ($a !== 0); }); // Remove if Array value have 0

$highval = max($arr1);
$lowval  = min($arr1);
$stores=count($arr);

echo 'Item is available in '.$stores.' vars and is between '.$lowval.' and '.$highval.'';

Ourput :

Item is available in 4 vars and is between 1 and 20

Get the lowest variable in an array

2 Answers2