PHP Reference
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Quick Reference

The PHP arsort() function sorts an associative array in descending order, according to the value.

<?php
$a = array('Num 1' => '12', 'Num 2' => '6', 'Num 3' => '18');

arsort($a);
print_r($a);
?>

Note

Arrays count starting from zero NOT one. So item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on.

Output

Array ( [Num 3] => 18 [Num 1] => 12 [Num 2] => 6 )

Syntax

arsort(array, sorttype)

Parameters

ParameterDescription
arraySpecifies an array (required)
sorttypeSpecifies how to compare the array elements/items:

  • 0 = SORT_REGULAR - Compare items normally (don't change types) (default)

  • 1 = SORT_NUMERIC - Compare items numerically

  • 2 = SORT_STRING - Compare items as strings

  • 3 = SORT_LOCALE_STRING - Compare items as strings, based on current locale

  • 4 = SORT_NATURAL - Compare items as strings using natural ordering

  • 5 = SORT_FLAG_CASE - Can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings case-insensitively

PHP Notes:

  • When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
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