PHP array_change_key_case() Function
It is an inbuilt function of PHP. The array_change_key_case() function returns an array with all arrays keys in lower case or upper case.
array_change_key_case(array,case);
Parameters
| Parameter | Description | Is compulsory |
|---|---|---|
| array | Specifies the name of the array to sort. | Compulsory |
| Sort_flags | Specifies how to compare the array elements. | Optional |
Return
PHP Example
<?php
$vow=array("a"=>"a", "e"=>"e", "i"=>"i", "o"=>"o", "u"=>"u");
print_r(array_change_key_case($vow,CASE_UPPER));
?>
Output
Array( [A]=>a [E]=>e [I]=>i [O]=>o [U]=>u )
PHP Example
<?php
$sal=array("Rahul"=> "10000" , "Ajay"=> "15000" , "Sid"=> "20000" );
print_r(array_change_key_case( $sal, CASE_LOWER ) );
?>
Output
Array ( [rahul]=> 10000 [ajay]=> 15000 [sid]=> 20000 )
PHP Example
<?php
$age=array("RAHUL"=> "10" , "VIKAS"=> "20" , "SID"=> "25" );
print_r(array_change_key_case( $age) );
?>
Output
Array ([rahul]=> 10 [vikas]=> 20 [sid]=> 25 )