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# Convert a MAC Address to Numbers only - No letters - So it can be entered on a telephone

Posted on 2007-10-01
Medium Priority
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I need to have a simple form on a page that a user can enter a MAC Adress and have it 'translated' to the numbers the user would push on their telephone keypad to enter the number.  Very similar to a 1-800 number when the telephone number spells out a word - 1-800-GET-BEER would be 1-800-438-2337.  In this case however, it is much simpler as there are far fewer letters.

If someone could give me the whole html page from <html> to </html> that would be awesome!

Here are the basic rules for this translation:

i.      0  9 = 0  9
ii.      A = 22
iii.      B = 222
iv.      C = 2222
v.      D = 33
vi.      E = 333
vii.      F = 3333

So if I typed into the form:  000b8200e395  I would get the number -->  0002228200333395

The 'B' was converted to '222' and the 'E' was converted to '333' and the string was put back together.

Here is a link to a simple PHP page that does this with ASCII.

http://www.wallpaperama.com/tutorials/letter-converter.php (I just don't need ASCII)

Thanks!!!
0
Question by:joedunn
• 3
• 2

LVL 35

Expert Comment

ID: 19994494
You just need to change "thisScript.php" to the name of the script.

<html>
<form METHOD=POST action="thisScript.php">
MAC Address: <INPUT TYPE="text" name="mac">
<input type="submit">
</form>
<?php
if (isset(\$_POST['mac'])) {
\$text = \$_POST['mac']; #"000b8200e395";
echo "Before: \$text<br>\n";
\$translation = array("A"=>"22",
"B"=>"222",
"C"=>"2222",
"D"=>"33",
"E"=>"333",
"F"=>"3333");
foreach (\$translation as \$key => \$value) {
\$text = preg_replace("@\$key@i",\$value,\$text);
}
echo "After: \$text<br>\n";
}
?>
</html>
0

Author Comment

ID: 19994731
SO CLOSE!!!

I have an existing page that I want to add this form to.  What do I need to do to make to it work righ inside an existing page?

_____________  Submit Button

_____________  <--- Display Answer
0

LVL 35

Accepted Solution

Terry Woods earned 2000 total points
ID: 19994821
Put this inside the page, changing "thisScript.php" to the name of the page:

<form METHOD=POST action="thisScript.php">
<INPUT TYPE="text" name="mac">
<input type="submit">
</form>
<?php
if (isset(\$_POST['mac'])) {
\$text = \$_POST['mac']; #"000b8200e395";
#echo "Before: \$text<br>\n";
\$translation = array("A"=>"22",
"B"=>"222",
"C"=>"2222",
"D"=>"33",
"E"=>"333",
"F"=>"3333");
foreach (\$translation as \$key => \$value) {
\$text = preg_replace("@\$key@i",\$value,\$text);
}
echo "\$text<br>\n"; #display the answer
}
?>
0

Author Comment

ID: 19994964
So I need to create a second page called thisscript.php?
0

LVL 19

Expert Comment

ID: 19995001
\$translation = array("A"=>"22",
"B"=>"222",
"C"=>"2222",
"D"=>"33",
"E"=>"333",
"F"=>"3333");

HUH? what if the MAC is 3DB2---
3332222
also the same as E2AA and many others

You'll need to take each 2 hex digits and convert them to 000 to 255
or
just convert the entire MAC  to one huge decimal number
0

LVL 35

Expert Comment

ID: 19995630
> So I need to create a second page called thisscript.php?

No. Change the line:
<form METHOD=POST action="thisScript.php">
to use the name of the existing page for the action.

By the way, I don't know much about MAC addresses, so I can't say whether Michael701's comments mean that you'll need a change to get your code working.
0

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