find the biggest difference between numbers - php

Question

i have 7 numbers in random from -100 to 100, from those seven numbers i need to find the biggest diference between each them
example:
-50 , 60 , -4 , 80 , 25, -34, 15
the output will be 130 -50 and 80 is the biggest diference
but i need in php
i have tried echo max(rand(-100, 100));
but it is not the output im looking for
this i tried too:
$myarray = array(
'this' => 2,
'that' => 14,
'them' => -5,
'other' => 200,
'nothing' => 42,
'somethingelse' => 1,
'you' => 10,
'me' => 30);
foreach ($myarray as $key => $value) {
if (!isset ($min) || $value < $min) { $min = $value; }
if (!isset ($max) || $value > $max) { $max = $value; }
}
$diff = $max - $min;
echo $diff;
any suggestion?

Answer 1

<?php
$array = array(-50 , 60 , -4 , 80 , 25, -34, 15);
$min = 0;
$max = 0;
foreach($array as $element) {
if ($element < $min) $min = $element;
if ($element > $max) $max = $element;
}
echo $max - $min;

Answer 2

Your approach using max() wasn’t wrong, but max() expects an array as its first parameter whereas rand() only returns a single integer.
The solution should be:
$diff = max($myarray) - min($myarray);

Answer 3

try this one
$myarray = array(
'this' => 2,
'that' => 14,
'them' => -5,
'other' => 200,
'nothing' => 42,
'somethingelse' => 1,
'you' => 10,
'me' => 30);
function bigDiff($arr){
if(count($arr)>0){
$max = max($arr);
$min = min($arr);
$diff = ($max)-($min);
return $diff;
}
return "Null input array provided";
}
echo bigDiff($myarray);
outputs 205

Answer 4

This could be another way:
$arr = array(
'this' => 2,
'that' => 14,
'them' => -5,
'other' => 200,
'nothing' => 42,
'somethingelse' => 1,
'you' => 10,
'me' => 30
);
sort($arr);
$diff = $arr[count($arr) - 1] - $arr[0];

Answer 5

You can try this:
$array = array(-50 , 60 , -4 , 80 , 25, -34, 15);
$max = max($array); //80
$min = min($array); //-50
$difference = $max - $min; //130