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PHP | ksort() Function

PHP ksort() Function

Hello folks! welcome back to a new section of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP ksort() Function.

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


Following below is the syntax to use this function -

ksort ( $array, $sort_flag );

Parameter Details

Sr.NoParameter & Description


Required. Specifies an array



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.


Try out the below example -

   $transport = array( a=>'foot', b=>'bike', c=>'car', d=>'plane');


When the above code is executed, it will produce the following result -

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

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP list() Function.

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