array sort by key value php code example
Example 1: php sort array by key
$weight = [
'Pete' => 75,
'Benjamin' => 89,
'Jonathan' => 101
];
ksort($weight);
Example 2: php sort array by specific key
usort($array, function ($a, $b) {
return ($a['specific_key'] < $b['specific_key']) ? -1 : 1;
});
Example 3: php sort array of array by key
$inventory = [
['price' => 10.99, 'product' => 'foo 1'],
['price' => 5.99, 'product' => 'foo 2'],
['price' => 100, 'product' => 'foo 3'],
];
$price = array_column($inventory, 'price');
array_multisort($price, SORT_DESC, $inventory);
Example 4: php array sort by key value
To PHP sort array by key, you should use:
ksort() (for ascending order) or krsort() (for descending order).
To PHP sort array by value, you will need functions:
asort() and arsort() (for ascending and descending orders).
Example 5: php rearrange array
function rearrange_array($array, $key) {
while ($key > 0) {
$temp = array_shift($array);
$array[] = $temp;
$key--;
}
return $array;
}
Example 6: php order array by specific key
function cmp($a, $b)
{
return strcmp($a->display_name, $b->display_name);
}
usort($blogusers, "cmp");
foreach ($blogusers as $bloguser)
{
...