[PHP] Reg- array_unique

[SenthilVelavan]

Hello All,

            I tried a program using array_unique.It shows different outputs in PHP4.06 
and PHP4.22

Program    :

<?php
$employee[0]='snp';
$employee[1]='snp';
$employee[2]='snp';
$yee=array_unique($employee);
while(list($i,$c)=each($yee))
{
echo "Index ".$i."  Content".$c;
}
?>

Output    :

PHP4.06
    Index 0 Content snp 
PHP4.22
    Index 2 Content snp 

Why the index is differed in two version?
Whether the function array_unique is handled in a different way in PHP4.22.
Any help is appreciated.

Advance thanks and regards,
SenthilVelavan.P