PHP Sort string value range array in numeric Order

Question

I have an array of range type values 257-1024, 1-256, 1025-2056. All these values are dynamically generated and positioned randomed. Before making an output I have to sort them in a numeric ASC order. Using sort or natsort function is giving the output as 1-256,1025-2056, 257-1024 as php recognise it as string. Is there a built in function with which this can be sorted/arranged in numeric range order i.e 1-256, 257-1024, 1025-2056

you can create your own sorting function using php usort php.net/manual/en/function.usort.php — Shantanu
– Shantanu, Commented Mar 29, 2016 at 13:29

Indrasis Datta · Accepted Answer · 2016-03-29 13:32:06Z

2

You can use natsort() function here.

$array = array("257-1024", "1-256", "1025-2056");

$a = natsort($array);

echo "<pre>";

print_r($array);

echo "</pre>";

Output:

Array
(
   [1] => 1-256
   [0] => 257-1024
   [2] => 1025-2056
)

Hope this helps.

answered Mar 29, 2016 at 13:32

Indrasis Datta

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wtadahiro · Accepted Answer · 2016-03-29 14:01:36Z

0

You can do like below using usort().

$array = ['257-1024', '1025-2056', '1-256'];
usort($array, function($a, $b){
    return ((int)explode('-', $a)[1] < (int)explode('-', $b)[0]) ? -1 : 1;
});
print_r($array);

Output is below.

Array
(
    [0] => 1-256
    [1] => 257-1024
    [2] => 1025-2056
)

edited Mar 29, 2016 at 14:01

answered Mar 29, 2016 at 13:43

wtadahiro

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