php sort array by key ascending code example

Example 1: sort array of array php

sort() //sort arrays in ascending order
rsort() //sort arrays in descending order
asort() //sort associative arrays in ascending order, according to the value
ksort() //sort associative arrays in ascending order, according to the key
arsort() //sort associative arrays in descending order, according to the value
krsort() //sort associative arrays in descending order, according to the key
  
//Example
  $array = array(1, 3, 2);
  sort($array) //1, 2, 3

Example 2: php sort array by key

$weight = [
    'Pete' => 75, 
    'Benjamin' => 89,
    'Jonathan' => 101
  ];  	
  ksort($weight);

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

function aasort (&$array, $key) {
    $sorter=array();
    $ret=array();
    reset($array);
    foreach ($array as $ii => $va) {
        $sorter[$ii]=$va[$key];
    }
    asort($sorter);
    foreach ($sorter as $ii => $va) {
        $ret[$ii]=$array[$ii];
    }
    $array=$ret;
}

aasort($your_array,"order");

Example 5: 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)
    {
        ...