sorting multi dimensional array alphabetically

Question

[0] => Array (
    [term] => punk
    [term_html] => <a href=""> punk </a>
    )
[1] => Array (
    [term] => conflict
    [term_html] => <a href=""> conflict </a>
    )
[2] => Array (
    [term] => Crass
    [term_html] => <a href=""> Crass </a>
    )
[3] => Array (
    [term] => bct 2
    [term_html] => <a href="">
    )

How can I sort this array alphabetically based on 'term' of the array inside array?

i tried this:

function sortByOrder($a, $b) {
    return $search_terms_html[term];
}

uasort($search_terms_html, 'sortByOrder');

but it doesn't work :(

Possible duplicate of Sort multidimensional array alphabetically — RïshïKêsh Kümar
– RïshïKêsh Kümar, Commented Jun 18, 2017 at 4:36

bill.lee · Accepted Answer · 2017-06-18 04:51:24Z

0

The comparison callback function passed to uasort() is expected to return a value < 0, 0, or > 0, describing the relationship between its arguments. In your example, the callback is simply returning the the unchanging value $search_terms_html[term]; you are not using the arguments representing the array elements (and passed as parameters to the callback function, sortByOrder()). Assuming that the 'term' elements are strings, try defining the callback as:

function sortByOrder($a, $b) {
   return strcmp($a['term'],$b['term']);
}

strcmp() returns values of a sting comparison consistent with the callback's expectations.

edited Jun 18, 2017 at 4:51

answered Jun 18, 2017 at 4:40

bill.lee

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Pyae Sone · Accepted Answer · 2017-06-18 04:41:12Z

0

Easiest way I find out to sort an entire multidimensional array by one element of it:

<?php 
$multiArray = Array( 
    Array("id" => 1, "name" => "Defg"), 
    Array("id" => 2, "name" => "Abcd"), 
    Array("id" => 3, "name" => "Bcde"), 
    Array("id" => 4, "name" => "Cdef")); 
$tmp = Array(); 
foreach($multiArray as &$ma) 
    $tmp[] = &$ma["name"]; 
array_multisort($tmp, $multiArray); 
foreach($multiArray as &$ma) 
    echo $ma["name"]."<br/>"; 


?>

Outputs

Abcd
Bcde
Cdef
Defg

answered Jun 18, 2017 at 4:41

Pyae Sone

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