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PHP ksort() Function

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Example

Sort an associative array in ascending order, according to the key:

<?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
ksort($age);
?>
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Definition and Usage

The ksort() function sorts an associative array in ascending order, according to the key.

Tip: Use the krsort() function to sort an associative array in descending order, according to the key.

Tip: Use the asort() function to sort an associative array in ascending order, according to the value.

Syntax

ksort(array,sortingtype);

Parameter Description
array Required. Specifies the array to sort
sortingtype Optional. Specifies how to compare the array elements/items. Possible values:
  • 0 = SORT_REGULAR - Default. Compare items normally (don't change types)
  • 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 -

Technical Details

Return Value: TRUE on success. FALSE on failure
PHP Version: 4+
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