How to replace letter position?

[golf98765]

How to replace each letter on each position?

ex.
$word = compare price

/* if letter position = a => replace q,w,s,x,z on a
if letter position = b => replace v,f,g,h,n on b
if letter position = c => replace x,s,d,f,v on c
if letter position = o => replace i,k,l,p on o
if letter position = m => replace n,h,j,k on m
if letter pos..

.
.
.

and the result will be :

xompare price --- letter position 1 changed.
sompare price --- letter position 1 changed.
dompare price --- letter position 1 changed.
fompare price --- letter position 1 changed.
vompare price --- letter position 1 changed.
cimpare price --- letter position 2 changed.
ckmpare price --- letter position 2 changed.
clmpare price --- letter position 2 changed.
cpmpare price --- letter position 2 changed.
. --- letter position 3 changed.
.
.
till end position
*/

What's the script?

Thank you.

[Weedpacket]

It's not clear what you're wanting, but if you want to change a character in a string you can use []:

$word = "compare price";
$word[5] = 'X';
echo $word;

would output "compaXe price"; (note that counting starts from 0).

[golf98765]

Weedpacket wrote:

It's not clear what you're wanting, but if you want to change a character in a string you can use []:

$word = "compare price";
$word[5] = 'X';
echo $word;

would output "compaXe price"; (note that counting starts from 0).

yes , that's what i mean.

but how to write script to replace 5 difference character like:

$word = hello

if we found character "h" then replace "h" with 1,2,3,4,5

so the result will be:

1ello
2ello
3ello
4ello
5ello

Thank you.

[Weedpacket]

That would be done in, say, a [man]for[/man] loop.