Sorting integer value in php [closed] - php

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I have 19 variables in a php file.
$a = 20;
$b = 23;
$c = 2;
$d = 92;
$e = 51;
$f = 27;
$g = 20;
$h = 20;
.....
.....
$s = 32;
What i need, I need to show only top 5 value. And there is similar value for some variables. In that case, I need to show the first value only if it is in the top 5 value.
I am not having any clue on doing this.
After receiving some feedback given bellow, i have used array and asort
Here is the example-
<?php
$fruits = array("a" => "32", "b" => "12", "c" => "19", "d" => "18");
asort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>
The output looks like this:
b = 12 d = 18 c = 19 a = 32
I need the reverse result. Meaning, 32, 19, 18, 12.....
Any help. Just dont know the exact command

Answer 1

This is best done by putting the values of the variables into an array and running
sort($arr); (this is from lowes to highest).
rsort($arr); sorts high to low.
http://php.net/manual/en/array.sorting.php
Then you can get the first values at array-index 0,1,2,3 and 4 which will be the biggest numbers.
So:
$arr= array ($a,$b,$c, ....);
rsort($arr);
var_dump($arr); // gives the output.
$arr[0] // biggest number
$arr[4] // 5th biggest number.

Answer 2

A funny way to do this:
$a = 20;
$b = 23;
$c = 2;
$d = 92;
$e = 51;
$f = 27;
$g = 20;
$h = 20;
$array = compact(range('a', 'h'));
rsort($array);
foreach(array_slice($array, 0, 5) as $top) {
echo $top, "\n";
}
Output
92
51
27
23
20
Demo: http://3v4l.org/Wi8q7

Answer 3

Do they need to be individual variables? Storing the values in an array is a better option. So, either manually put all the variables into an array, or change your structure to something more like:
$arr = array(
'a' = 20,
'b' = 23,
'c' = 2,
'd' = 92,
'e' = 51,
....
....
's' => 32
);
or similar. Then use sort() to sort the array:
sort($arr);
To get the top 5, use array_slice():
$arr = array_slice($arr, 0, 5);
See demo
Note: sort() may not be best option for you depending on the desired result. For other sorting options, consult the manual: http://php.net/manual/en/array.sorting.php

Answer 4

<?php
array_push($data,$a);
array_push($data,$b);
.
.
.
$sorted_array = usort($data, 'mysort');
$top5 = array_splice($sorted_array,5);
if(in_array($your_variable,$top5)){
return $top5[0];
}else {
return $top5;
}
function mysort($a,$b){
if ($a == $b) {
return 0;
}
return ($a < $b) ? 1 : -1;
}
?>

Answer 5

$array=array();
for ($i=97;$i<=115;$i++){ //decimal char codes for a-s
$var =chr($i);
$array[]= $$var; //variable variable $a- $s
}
asort($array);
var_dump($array);