根据值按月对数组进行排序

Question

I have a php array as following -

$testar = array( 
 '3423sdfskjx' => 'January 2017',
 '1233sd3dkjx' => 'December 2017',
 '1534grfdbfd' => 'March 2017',  
 '5849dj4fodo' => 'April 2017',
 'ndj3058rjei' => 'February 2017',
 'lsdl39430xm' => 'September 2017',
 '059dmejri30' => 'July 2017',
 'mcjd923kd05' => 'November 2017',
 '3409sndfk3k' => 'May 2017',
 '094873uv3jj' => 'June 2017',
 '7859349cmei' => 'October 2017',
 '086u7n3if39' => 'August 2017');

Primarily key is a random id and value representing some month value. I need to be sort it in alphabetical order of values so that array gets reorganized where the first key value is 'January 2017', second key value is 'February 2017' and so forth. Standard use of sort/rsort/asort/ksort won't work. How do I get this array to be sorted by months based on the array element value?

Answer 1

You will need to define a custom function for sorting your array

function sortByDate($a, $b) {
     return strtotime($a) - strtotime($b);
}

usort($testar, 'sortByDate');

I have derived the answer from this one