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PHP multidimensional array sorting example

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Release: 2016-07-25 09:07:27
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  1. $array = array(

  2. '0' => array('3', 'one'),
  3. '1' => array('101' , 'two'),
  4. '2' => array('12', 'three'),
  5. '3' => array('13', 'four'),
  6. '4' => array ('1', 'five'),
  7. '5' => array('3', 'six'),
  8. );

  9. /*Method 1: Using uasort () function instead of usort() function. The difference is that uasort() will maintain the original index and usort() will rebuild the index. */

  10. function cmp($a, $b){
  11. if($a[0] == $b[0]){
  12. return 0;
  13. }
  14. return($a[0] < $b[0 ]) ? -1 : 1;
  15. }

  16. uasort($array,"cmp");

  17. print_r($array);

  18. echo "
    **********************
    ";

  19. /*Method 2: Use array_multisort*/

  20. foreach ($array as $key=>$value){
  21. $first[$key] = $value[0];
  22. $second[$key] = $value[1];
  23. }
  24. array_multisort($first,SORT_NUMERIC,SORT_ASC,$second,SORT_STRING,SORT_ASC,$array);
  25. print_r($array);
  26. /*
  27. Sort order flag:
  28. SORT_ASC – as per Sort in ascending order
  29. SORT_DESC - Sort in descending order

  30. Sort type flags:

  31. SORT_REGULAR - Compare items in the usual way
  32. SORT_NUMERIC - Compare items in numerical order
  33. SORT_STRING - Compare items in strings
  34. */

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>>> For more information, please view the complete list of php array sorting methods



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