CODEWITHSUNDEEP
phparrayssorting
user2881809
user2881809

Reputation:

Sorting data in an array by keys

Good day.

We have array:

array(3) {
  [1]=>
  array(9) {
    [1]=>
    string(12) "aaandroid.ru"
    [2]=>
    string(1) "0"
    [3]=>
    string(1) "0"
    [4]=>
    string(1) "0"
    [5]=>
    string(1) "0"
    [6]=>
    string(1) "0"
    [7]=>
    string(5) "Test2"
    [8]=>
    string(10) "2012-03-27"
    [9]=>
    string(10) "2013-04-29"
  }
  [2]=>
  array(9) {
    [1]=>
    string(7) "aaga.ru"
    [2]=>
    string(1) "0"
    [3]=>
    string(1) "0"
    [4]=>
    string(1) "0"
    [5]=>
    string(1) "0"
    [6]=>
    string(1) "0"
    [7]=>
    string(8) "Test1"
    [8]=>
    string(10) "2008-02-21"
    [9]=>
    string(10) "2013-04-29"
  }
  [3]=>
  array(9) {
    [1]=>
    string(10) "aatrakc.ru"
    [2]=>
    string(1) "0"
    [3]=>
    string(1) "0"
    [4]=>
    string(1) "0"
    [5]=>
    string(1) "0"
    [6]=>
    string(1) "0"
    [7]=>
    string(8) "Test3"
    [8]=>
    string(10) "2012-03-27"
    [9]=>
    string(10) "2013-04-29"
  }

Tell me please how sort data in array with key?

For example i would like get array where data sorting on element 7, ie. in result i would like get array:

array(3) {
      [1]=>
      array(9) {
    [1]=>
    string(7) "aaga.ru"
    [2]=>
    string(1) "0"
    [3]=>
    string(1) "0"
    [4]=>
    string(1) "0"
    [5]=>
    string(1) "0"
    [6]=>
    string(1) "0"
    [7]=>
    string(8) "Test1"
    [8]=>
    string(10) "2008-02-21"
    [9]=>
    string(10) "2013-04-29"
      }
    [1]=>
    string(12) "aaandroid.ru"
    [2]=>
    string(1) "0"
    [3]=>
    string(1) "0"
    [4]=>
    string(1) "0"
    [5]=>
    string(1) "0"
    [6]=>
    string(1) "0"
    [7]=>
    string(5) "Test2"
    [8]=>
    string(10) "2012-03-27"
    [9]=>
    string(10) "2013-04-29"
      }
      [3]=>
      array(9) {
        [1]=>
        string(10) "aatrakc.ru"
        [2]=>
        string(1) "0"
        [3]=>
        string(1) "0"
        [4]=>
        string(1) "0"
        [5]=>
        string(1) "0"
        [6]=>
        string(1) "0"
        [7]=>
        string(8) "Test3"
        [8]=>
        string(10) "2012-03-27"
        [9]=>
        string(10) "2013-04-29"
      }

Tell me please it really an how make it?

Upvotes: 0

Views: 47

Answers (2)

Shane R
Shane R

Reputation: 1

Continuing Hidde's answer, if you want to reverse the order of the sort you would still use usort(), but you reverse the order of the parameters in the call to strcmp(). This will reverse which of the two arrays usort() sees as the larger value.

usort($myArray, function ($a, $b) {
   return strcmp($b[7], $a[7]);
});

This uses an anonymous function, so it will only work on Php 5.3 or later. If you have to work on 5.2 define a function to use as the callback.

function mySortFunction($a, $b) {
    return strcmp($b[7], $a[7]);
}

usort($myArray, 'mySortFunction');

See:

Upvotes: 0

Hidde
Hidde

Reputation: 11911

Check the PHP usort function: http://www.php.net/manual/en/function.usort.php. It provides (in place) sorting based on a callback, which you can create.

Example:

usort($myArray, function ($a, $b) {
    return strcmp($a[7], $b[7]);
});

Upvotes: 2

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