Writing a cloning function to generate unique names - php

Question

I would like to create a clone function on the following array,
$usernames = array ( 'jack', 'amy', 'chris');
such that:
Cloning jack, would result in jack-1 (because jack-1 does not exist in usernames array yet). Once cloned, the usernames array should be updated to:
$usernames = array ( 'jack', 'amy', 'chris', 'jack-1');
Cloning jack, (again) would result in jack-2
Cloning jack-1, would result in jack-1-1
Cloning jack-1-1, would result in jack-1-1-1
Cloning jack-1-1 (again), would result in jack-1-1-2
Cloning jack-1-1-1 would result in jack-1-1-1-1
and so on and so forth..
I can work with in_array to do this, but looking for an efficient way to do this.
Thanks,

Answer 1

I've tested this and it works.
First, we check if the the value already exists, if it doesn't, we just go ahead and add it.
If it does exist, we add the incrementing number with a dash to it. We keep incrementing until we get to one that doesn't exist...then we add it.
<?php
$array = ['jack', 'sally'];
function cloneFunction($value, $array)
{
if (!in_array($value, $array))
{
$array[] = $value;
}
else
{
$i = 0;
while(in_array($value, $array))
{
$i++;
$value = $value . '-' . $i;
}
$array[] = $value;
}
return $array;
// Do return $value if you just want the value.
}
print_r(cloneFunction('jack', $array));

Answer 2

Based on Sajan's Logic, it works according to the requirement, if I modify the logic this way. Copying the original username and re-parsing the original array, does the trick.
$array = array('jack', 'sally');
function cloneFunction($value, $array)
{
if (!in_array($value, $array))
{
$array[] = $value;
}
else
{
$i = 0;
$j = 0;
while(in_array($value, $array))
{
$i++;
$value = $value . '-' . $i;
$stagedValue = $value;
while(in_array($value, $array))
{
$j++;
$value = $stagedValue . '-' . $j;
}
$j = $i;
}
$array[] = $value;
}
return $array;
// Do return $value if you just want the value.
}
print_r(cloneFunction('jack', $array));