strcmp equivelant for integers (intcmp)

05/08/2020 06:00:01

So we got this function in PHP

strcmp(string $1,string $2) // returns -1,0, or 1;

We Do not however, have an intcmp(); So i created one:

function intcmp($a,$b) {
    if((int)$a == (int)$b)return 0;
    if((int)$a  > (int)$b)return 1;
    if((int)$a  < (int)$b)return -1;
}

This just feels dirty. What do you all think?

this is part of a class to sort Javascripts by an ordering value passed in.

class JS
{
    // array('order'=>0,'path'=>'/js/somefile.js','attr'=>array());
    public $javascripts = array(); 
    ...
    public function __toString()
    {
        uasort($this->javascripts,array($this,'sortScripts'));
        return $this->render();
    }
    private function sortScripts($a,$b)
    {
        if((int)$a['order'] == (int)$b['order']) return 0;
        if((int)$a['order'] > (int)$b['order']) return 1;
        if((int)$a['order'] < (int)$b['order']) return -1;
    }
    ....
}

Verified Answer (105 Votes)

05/18/2010 02:23:53

Sort your data with:

function sortScripts($a, $b)
{
    return $a['order'] - $b['order'];
}

Use $b-$a if you want the reversed order.

If the numbers in question exceed PHP's integer range, return ($a < $b) ? -1 : (($a > $b) ? 1 : 0) is more robust.

105

Answer #2 (12 Votes)

05/18/2010 01:45:35

You could use

function intcmp($a,$b)
    {
    return ($a-$b) ? ($a-$b)/abs($a-$b) : 0;
    }

Although I don't see the point in using this function at all

12

Answer #3 (9 Votes)

06/16/2016 17:55:01

why reinventing the wheel? http://php.net/manual/en/function.strnatcmp.php

echo strnatcmp(1, 2) . PHP_EOL; // -1
echo strnatcmp(10, 2) . PHP_EOL; // 1
echo strnatcmp(10.5, 2) . PHP_EOL; // 1 - work with float numbers
echo strnatcmp(1, -2) . PHP_EOL; // 1 - work with negative numbers

Test it here: https://3v4l.org/pSANR

9
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