Ranking elements in txt file

[Scummy12]

I have a txt file of numbers e.g. 1,4,3,5,19,3,11 all in a column. Is it possible to echo only the highest 3 numbers?

[RichardRotterdam]

This is how I would do it.

1. Put all values in an array.

2. Sort them by value using sort or usort

3.  echo the first item.

[dragon_sa]

like this

<?php 
$s=array('1','4','3','5','19','3','11');
rsort($s);
echo $s[0]."<br/>".$s[1]."<br/>".$s[2];
?>

[Scummy12]

like this

<?php 
$s=array('1','4','3','5','19','3','11');
rsort($s);
echo $s[0]."<br/>".$s[1]."<br/>".$s[2];
?>

Ok but the numbers are in a txt file, and lets say that there are about 30,000 numbers...

[dragon_sa]

suppose your file is called test.txt and in the same directory as the script and also just a comma seperated list of numbers

$file="test.txt";
$f=fopen($file, "r");
$content=fread($f,filesize($file));
fclose($f);
$del=",";
$s=explode($del, $content);
rsort($s);
echo $s[0]."<br/>".$s[1]."<br/>".$s[2];