PHP - Function ksort()


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Syntax

ksort ( $array, $sort_flag );

Definition and Usage

The ksort() function sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays.

Parameters

ParameterDescription
arrayRequired. Specifies an array
sort_flag Optional. Specifies how to sort the array values. Possible values:
  • SORT_REGULAR - Default. Treat values as they are (don't change types)
  • SORT_NUMERIC - Treat values numerically
  • SORT_STRING - Treat values as strings
  • SORT_LOCALE_STRING - Treat values as strings, based on local settings

Return Value

This function returns TRUE on success, or FALSE on failure.

Example

Try out following example:

<?php
$transport = array( a=>'foot', b=>'bike', c=>'car', d=>'plane');
ksort($transport);
print_r($transport);
?> 

This will produce following result:

Array 
( 
   [a] => foot 
   [b] => bike 
   [c] => car 
   [d] => plane
) 

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