How can i sort array by value of array [duplicate]

Question

I have given array below i want to sort that array by Level value 1 to 4.

Form :

Array ( [20] => Array ( [sid] => 1020 [L] => 1027 [R] => 1033 [Level] => 1 ) 
    [27] => Array ( [sid] => 1027 [L] => 1030 [R] => 1073 [Level] => 2 )
    [30] => Array ( [sid] => 1030 [L] => 1074 [R] => [Level] => 3 ) 
    [74] => Array ( [sid] => 1074 [L] => [R] => [Level] => 4 ) 
    [73] => Array ( [sid] => 1073 [L] => [R] => [Level] => 3 ) 
    [33] => Array ( [sid] => 1033 [L] => [R] => [Level] => 2 ) )

To:

Array ( [20] => Array ( [sid] => 1020 [L] => 1027 [R] => 1033 [Level] => 1 ) 
    [27] => Array ( [sid] => 1027 [L] => 1030 [R] => 1073 [Level] => 2 )
    [33] => Array ( [sid] => 1033 [L] => [R] => [Level] => 2 )
    [30] => Array ( [sid] => 1030 [L] => 1074 [R] => [Level] => 3 ) 
    [73] => Array ( [sid] => 1073 [L] => [R] => [Level] => 3 ) 
    [74] => Array ( [sid] => 1074 [L] => [R] => [Level] => 4 )      
    )

How is this not just sorting on Level? How is any "specific value" involved? — Scott Hunter
– Scott Hunter, Commented Apr 30, 2015 at 14:45
Or a simpler way: usort($arraytosort,array($this, 'Level')); — ion
– ion, Commented Apr 30, 2015 at 14:46

Samuel Cook · Accepted Answer · 2015-04-30 14:47:34Z

2

You could use array_multisort()

<?php
$array = array(
    array('Level'=>1),
    array('Level'=>2),
    array('Level'=>3),
    array('Level'=>4),
    array('Level'=>3),
    array('Level'=>2)
);

$tmp = array();
foreach($array as $r){
    $tmp[] = $r['Level'];
}

array_multisort($tmp,SORT_ASC,$array);

echo '<pre>',print_r($array),'</pre>';

answered Apr 30, 2015 at 14:47

Samuel Cook

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