[SOLVED] Translator... what to do?

[JP128]

Ok, lets say that I wanted to build a letter translator. I would need something that would take, lets say for 'a' and to make it 'ka', and for 'b' to make it 'tu'. I have a whole list that my little sister uses to do it, and I wanted to see if I could create a translator in PHP. I was thinking of using eregi_replace(), but I ran into a problem. If it finds the letter again that it translated it from, it would re-translate.

 

For example, Johnny would be 'Zumoritotofu'. With my translator it comes out to be 'Zidomoarihiarihiichimoeichimochimofu.'

 

I know why it does it, I just don't know syntactically what to use to do it properly.

 

here is the key:

 

A - ka 
B - tu  
C - mi  
D - te  
E - ku  
F - lu  
G - ji 
H - ri  
I - ki  
J - zu  
K - me  
L - ta  
M - rin 
N - to 
O - mo  
P - no  
Q - ke  
R- shi  
S - ari 
T -chi 
U - do  
V - ru  
W - mei 
X - na  
Y - fu  
Z - zi 

 

and here is my code to do it.

 

<?php
if(isset($_POST['message']) && $_POST['toFrom'] == "to"){

echo translate_into($_POST['message']);

} else if(isset($_POST['message']) && $_POST['toFrom'] == "from"){

echo translate_from($_POST['message']);

} 
//Prints a message box.
echo "<br><br>

<form method='POST' name='translator'>

<textarea rows=5 cols=25 name='message'></textarea><br>

Translate to:<input type='radio' value='to' name='toFrom'><br>

Translate from:<input type='radio' value='from' name='toFrom'><br>

<input type='submit' value='Translate!' name='translate'><br>

</form>
";




function translate_into($string){

$newString = $string;
$newString = eregi_replace('a','ka',$newString);
$newString = eregi_replace('b','tu',$newString);
$newString = eregi_replace('c','mi',$newString);
$newString = eregi_replace('d','te',$newString);
$newString = eregi_replace('e','ku',$newString);
$newString = eregi_replace('f','lu',$newString);
$newString = eregi_replace('g','ji',$newString);
$newString = eregi_replace('h','ri',$newString);
$newString = eregi_replace('i','ki',$newString);
$newString = eregi_replace('j','zu',$newString);
$newString = eregi_replace('k','me',$newString);
$newString = eregi_replace('l','ta',$newString);
$newString = eregi_replace('m','rin',$newString);
$newString = eregi_replace('n','to',$newString);
$newString = eregi_replace('o','mo',$newString);
$newString = eregi_replace('p','no',$newString);
$newString = eregi_replace('q','ke',$newString);
$newString = eregi_replace('r','shi',$newString);
$newString = eregi_replace('s','ari',$newString);
$newString = eregi_replace('t','chi',$newString);
$newString = eregi_replace('u','do',$newString);
$newString = eregi_replace('v','ru',$newString);
$newString = eregi_replace('w','mei',$newString);
$newString = eregi_replace('x','na',$newString);
$newString = eregi_replace('y','fu',$newString);
$newString = eregi_replace('z','zi',$newString);
return $newString;

}
function translate_from($string){

$newString = $string;
$newString = eregi_replace('ka','a',$newString);
$newString = eregi_replace('tu','b',$newString);
$newString = eregi_replace('mi','c',$newString);
$newString = eregi_replace('te','d',$newString);
$newString = eregi_replace('ku','e',$newString);
$newString = eregi_replace('lu','f',$newString);
$newString = eregi_replace('ji','g',$newString);
$newString = eregi_replace('ri','h',$newString);
$newString = eregi_replace('ki','i',$newString);
$newString = eregi_replace('zu','j',$newString);
$newString = eregi_replace('me','k',$newString);
$newString = eregi_replace('ta','l',$newString);
$newString = eregi_replace('rin','m',$newString);
$newString = eregi_replace('to','n',$newString);
$newString = eregi_replace('mo','o',$newString);
$newString = eregi_replace('no','p',$newString);
$newString = eregi_replace('ke','q',$newString);
$newString = eregi_replace('shi','r',$newString);
$newString = eregi_replace('ari','s',$newString);
$newString = eregi_replace('chi','t',$newString);
$newString = eregi_replace('do','u',$newString);
$newString = eregi_replace('ru','v',$newString);
$newString = eregi_replace('mei','w',$newString);
$newString = eregi_replace('na','x',$newString);
$newString = eregi_replace('fu','y',$newString);
$newString = eregi_replace('zi','z',$newString);
return $newString;

}
?> 

[JP128]

is there a more efficient way to store the values for the letters?

[trq]

Translating into is easy, you just need to make a temp copy of a string and return that. eg;

 

<?php

 function translate_into($string) {
   $key_vals = array(
     'a' => 'ka',
     'b' => 'tu',
     'c' => 'mi',
     'd' => 'te', 
     'e' => 'ku',
     ' ' => ' '
   );

   $tmp = '';

   for($i=0;$i<=strlen($string);$i++) {
     $tmp .= $key_vals[$string{$i}];
   }

   return $tmp;

 }

 echo translate_into('ab cde ab');

?>

 

However, turning it back is going to be alot more complex.

[JP128]

Thanks a lot, I got the translator to work going to... Now, I just need to think of how to do it going back.

 

[Cagecrawler]

I've used numbers as a transition phase to stop the decoder from altering parts that have already been decoded:

<?php
function decode($message)
{
$letters = array('ka','tu','mi','te','ku','lu','ji','ri','ki','zu','me','ta','rin','to','mo','no','ke','shi','ari','chi','do','ru','mei','na','fu','zi',' ');
$alphabet = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u,','v','w','x','y','z',' ');
for($i=0;$i < count($letters);$i++)
{
	$message = eregi_replace($letters[$i],$i.'.',$message);
}

$tmp = '';

foreach(explode('.',$message) as $t)
{
	$tmp .= $alphabet[$t];
}
return $tmp;
}

function encode($message)
{
$letters = array('ka','tu','mi','te','ku','lu','ji','ri','ki','zu','me','ta','rin','to','mo','no','ke','shi','ari','chi','do','ru','mei','na','fu','zi',' ');
$alphabet = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u,','v','w','x','y','z',' ');
for($i=0;$i < count($alphabet);$i++)
{
	$message = eregi_replace($alphabet[$i],$i.'.',$message);
}

$tmp = '';

foreach(explode('.',$message) as $t)
{
	$tmp .= $letters[$t];
}
return $tmp;
}

[JP128]

The translator to encode does... but to decode it doesn't always work.

 

Encoding:

Christmas => mirishikiarichirinkaari //Works!

 

Decoding:

mirishikiarichirinkaari => chrith //Not so well =D

[Cagecrawler]

Oops, I noticed that because some of the codes overlap (ari/rin/ri), some of the letters get mistaken.  I've reversed the loop and all works fine now:

<?php
function decode($message)
{
$letters = array('ka','tu','mi','te','ku','lu','ji','ri','ki','zu','me','ta','rin','to','mo','no','ke','shi','ari','chi','do','ru','mei','na','fu','zi',' ');
$alphabet = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',' ');
for($i = count($letters) -1;$i >= 0;$i--)
{
	$message = eregi_replace($letters[$i],$i.".",$message);
}

$tmp = "";

foreach(explode('.',$message) as $t)
{
	$tmp .= $alphabet[$t];
}
return $tmp;
}

function encode($message)
{
$letters = array('ka','tu','mi','te','ku','lu','ji','ri','ki','zu','me','ta','rin','to','mo','no','ke','shi','ari','chi','do','ru','mei','na','fu','zi',' ');
$alphabet = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',' ');
for($i = count($letters) -1;$i >= 0;$i--)
{
	$message = eregi_replace($alphabet[$i],$i.".",$message);
}

$tmp = "";

foreach(explode('.',$message) as $t)
{
	$tmp .= $letters[$t];
}
return $tmp;
}
?>

[JP128]

Still does the same thing

[trq]

We've given you ideas. I suggest you work on this yourself. As I said, decoding will become quite complex. I would think If I was getting paid for this job, I might quote a few hours work. Do you expect us to write it for you?

[Cagecrawler]

It works fine for me...

[trq]

I get the same foobar'd result as JP128, and it wouldn't be the only sequence to cause an issue. I'm also getting multiple Notices regarding undefined indexes.

[JP128]

I am not asking for it to be written, i was just saying that it didn't work. I just needed some ideas because I didn't know 'what' to do... I knew what had to be done, but not how to do it. I think tho, with this, I can try to create on like this.