当值具有字符串和数字时，如何对数组进行排序

Question

I have an array i want to sort it into ascending order.

Below is array i have.

Array

[0] => 101.6mm x 101.6mm 
[1] => 50.8mm x 50.8mm 
[3] => 76.2mm x 76.2mm 
[4] => 100mm x 100mm 
[5] => 15mm x 15mm 
[6] => 20mm x 20mm 
[8] => 25mm x 25mm 
[10] => 30mm x 30mm 
[12] => 40mm x 40mm 
[13] => 50mm x 50mm 
[14] => 60mm x 60m 
[15] => 80mm x 80mm 

Thanks in advance

Answer 1

You just need to write custom string parts comparison function for usort():

$products = [
                "101.6mm x 101.6mm",
                "50.8mm x 50.8mm",
                "76.2mm x 76.2mm",
                "100mm x 100mm",
                "15mm x 15mm",
                "20mm x 20mm",
                "50mm x 50.2mm",
                "25mm x 25mm",
                "30mm x 45mm",
                "30mm x 30mm",
                "40mm x 40mm",
                "50mm x 50mm",
                "60mm x 60m",
                "80mm x 80mm",
    ];

usort($products,
    function($a, $b) {
        list($vals_a, $vals_b) = [explode('x', $a), explode('x', $b)];
        $vals_a[0] = preg_replace('/(\s|mm)/mui', '',$vals_a[0]);
        $vals_a[1] = preg_replace('/(\s|mm)/mui', '',$vals_a[1]);
        $vals_b[0] = preg_replace('/(\s|mm)/mui', '',$vals_b[0]);
        $vals_b[1] = preg_replace('/(\s|mm)/mui', '',$vals_b[1]);
        if ($vals_a[0] < $vals_b[0])
            return -1;
        elseif ($vals_a[0] > $vals_b[0])
            return +1;
        else {
            if ($vals_a[1] < $vals_b[1])
                return -1;
            elseif ($vals_a[1] > $vals_b[1])
                return +1;
            else return 0;
        }
    });

var_dump($products);