php min max function not working properly - php

Question

I have code to get minimum and maximum value from comma separated value ranges by using below given code
<?php
$price=$_GET['price'];
$grade = str_replace('-', ',', $price);
$number = array($grade);
$max = max($number);
$min = min($number);
echo "min value is $min <br/>";
echo "max value is $max <br/>";
?>
for the input ?price=0-5,4-30,6-50 This should output minimum value 0 and maximum value 50 but my above code is giving output as
min value is 0,5,4,30,6,50
max value is 0,5,4,30,6,50
Kindly guide me where i am making mistake or any other working alternate.

Answer 1

You are incorrect with creating an array. Please use explode for this. Explode function will break the string into array.
First parameter is the character on which you want to split the string and the second one is input. In your case it would be nice to add the str_replace function right there, so you don't change the original input.
$input = '0-5,4-30,6-50';
$numbers = explode(',', str_replace('-', ',', $input));
And now you can use min and max functions and they will work properly.

Answer 2

After using str_replace method, you are converting a string into an array, your array looks like:
Array ( [0] => 0,5,4,30,6,50 )
With this array, you cant achieve or get the maximum and minimum value from an array.
You need to explode your string with comma as:
$yourArr = explode(",", $grade); // this will convert string into array.
Now your result should looks like:
Array ( [0] => 0 [1] => 5 [2] => 4 [3] => 30 [4] => 6 [5] => 50 )
Complete Example:
<?php
$price='0-5,4-30,6-50';
$grade = str_replace('-', ',', $price);
$yourArr = explode(",", $grade);
$max = max($yourArr);
$min = min($yourArr);
echo "min value is $min <br/>";
echo "max value is $max <br/>";
?>
Result:
min value is 0
max value is 50

Answer 3

<?php
$price = '0-5,4-30,6-50';
if(preg_match_all('/\d+/', $price, $matches)) {
$min = min($matches[0]);
$max = max($matches[0]);
var_dump($min, $max);
}
Output:
string(1) "0"
string(2) "50"