For loop/ encrypt

reag27

I have a question about the following code...I am trying to encrypt a string and code it with a key word, it should work like this:

1 turn the spaces on frase you want to encrypt to "+" sings and divide into string into the size of the keyword.
2 turn the string into numbers, example a=01, b=02...also do this for keyword
3 to the number string we add the module 27 from number keyword string like this:
0119001109
0512091520
0604092602
4 turn the encrypted number string back to a character string.

I so far have the following code, I ran into problems when dividing the number string and add module27 outside the loop, I'll appreciate any suggestions you could give me, Any Ideas??????????

<?php

$letras=array('00'=>'+','01'=>'a','02'=>'b','03'=>'c','04'=>'d','05'=>'e','06'=>'f','07'=>'g','08'=>'h','09'=>'i',10=>'j',11=>'k',12=>'l',13=>'m',14=>'n',15=>'o',16=>'p',17=>'q',18=>'r',19=>'s',20=>'t',21=>'u',22=>'v',23=>'w',24=>'x',25=>'y',26=>'z');

$frase = 'as kingfishers catch fire';
$clave= "eliot";

$frase1=str_replace(" ","+",$frase);
$div=strlen($clave);

$strin=chunk_split($frase1,$div);
$div1=strlen($strin);
echo $strin,"<br>";

for($i=0;$i<=$div1;$i++){

$a=$strin {$i};
$b=$clave {$i};

$key=array_search($a,$letras);
$key1=array_search($b,$letras);

echo $key;

echo $key1;

}

bpat1434

use

 tags and we'll look at it.

And why not just use crypt() or md5() or mcrypt() or anything like that instead?

~Brett

reag27

Well, the main thing I need to know, it's how to manipulate the string given by the loop, outside the loop??? or am I not able to do that????

bpat1434

write a function, place it above the loop, and then call it from within the loop:

<?php

function do_it($text)
{
    $for = 'This.Will.Be.In.Front';
    $text = $for.$text;
    return $text
}

for($i=0;$i<=$div1;$i++){
    $a=$strin {$i};
    $b=$clave {$i};

$key=array_search($a,$letras);
$key1=array_search($b,$letras);

do_it($key);
do_it($key1);

echo $key;
echo $key1;
}

?>

~Brett

reag27

Sorry to keep bodering you, I made the following changes and it only prints the first number of the string...

<?php

$letras=array('00'=>'+','01'=>'a','02'=>'b','03'=>'c','04'=>'d','05'=>'e','06'=>'f','07'=>'g','08'=>'h','09'=>'i','10'=>'j','11'=>'k','12'=>'l','13'=>'m','14'=>'n','15'=>'o','16'=>'p','17'=>'q','18'=>'r','19'=>'s','20'=>'t','21'=>'u','22'=>'v','23'=>'w','24'=>'x','25'=>'y','26'=>'z');

$frase = 'as kingfishers catch fire';
$clave= 'eliot';


function convert_num($letras,$frase,$clave){

$frase1=str_replace(" ","+",$frase);
$div=strlen($clave);

$strin=chunk_split($frase1,$div);
$div1=strlen($strin);
echo $strin,"<br>";

for($i=0;$i<=$div1;$i++){

$a=$strin {$i};
$b=$clave {$i};


$key=array_search($a,$letras);
$key1=array_search($b,$letras);


return $key1;
}
}

$c=convert_num($letras,$frase,$clave);
echo $c;
?>

bpat1434

3 to the number string we add the module 27 from number keyword string like this:
0119001109
0512091520
0604092602
4 turn the encrypted number string back to a character string.

I'm not sure what you meant by that. Can you explain?

And you misunderstood me. What I meant by putting the function outside was to create an outside function, and call it from within the for() loop, not encompass the for() loop inside the function. Here's what I've come up with, and I'll give you the results:

<?php
$newkey = array();
$letras = array('+' => '00',
		'a' => '01',
		'b' => '02',
		'c' => '03',
		'd' => '04',
		'e' => '05',
		'f' => '06',
		'g' => '07',
		'h' => '08',
		'i' => '09',
		'j' => '10',
		'k' => '11',
		'l' => '12',
		'm' => '13',
		'n' => '14',
		'o' => '15',
		'p' => '16',
		'q' => '17',
		'r' => '18',
		's' => '19',
		't' => '20',
		'u' => '21',
		'v' => '22',
		'w' => '23',
		'x' => '24',
		'y' => '25',
		'z' => '26'
		);
$frase = 'as kingfishers catch fire';
$clave = "eliot";

$frase1 = str_replace(" ", "+", strtolower($frase));
$div = strlen($clave);

$strin = chunk_split($frase1, $div, "\n");
$div1 = strlen($strin);
$div2 = explode("\n", $strin);

$key01 = '';
$key11 = '';

function add_strings($s1, $s2){
	$s3 = $s1+$s2;
	if(strlen($s3)<10)
	{
		$s3 = '0'.$s3;
	}
	echo $s1.'<br>'.$s2.' +<br>---------------<br>'.$s3.'<hr>';
	return $s3;
}

foreach($div2 as $divi){
	str_replace("\n", "", $divi);
	$div3 = strlen($divi);

if(!empty($divi) && ($divi != "\n"))
{
	$key01 = '';
	for($i=0; $i<$div3; $i++){
		$a = $divi{$i};
		$key = $letras[$a];
		$key01 .= $key;

		if(strlen($key11) < 10)
		{
			$b = $clave{$i};
			$key1 = $letras[$b];
			$key11 .= $key1;
		}
	}
	$newkeys[] = '';
	add_strings($key01, $key11);
}
}
?>

Results

0119001109

0512091520 +

0631092629

1407060919

0512091520 +

1919152439

0805181900

0512091520 +

1317273420

0301200308

0512091520 +

0813291828

0006091805

0512091520 +

0518183325

If that is something like what you want, then we can work from there.

<?php
$newkey = array();
// removed code that did not change for space

function add_strings($s1, $s2){
	$s3 = $s1+$s2;
	if(strlen($s3)<10)
	{
		$s3 = '0'.$s3;
	}
	return $s3;
}

foreach($div2 as $divi){
	str_replace("\n", "", $divi);
	$div3 = strlen($divi);

if(!empty($divi) && ($divi != "\n"))
{
	$key01 = '';
	for($i=0; $i<$div3; $i++){
		$a = $divi{$i};
		$key = $letras[$a];
		$key01 .= $key;

		if(strlen($key11) < 10)
		{
			$b = $clave{$i};
			$key1 = $letras[$b];
			$key11 .= $key1;
		}
	}
	$newkeys[] = add_strings($key01, $key11);
}
}

/*
// This is new code.  It goes ahead and splits the numerical string into
// shorter chunks of 2 so we can re-write an alphabetic string.
// The output is put on the screen.
*/

$words = array();
foreach($newkeys as $key)
{
	$keys = str_split($key, 2);
	foreach($keys as $k)
	{
		if($k > 26)
		{
			$k = '00';
		}
		$words[] .= array_search($k, $letras);
	}
		$i++;
}

$newstring = '';
foreach($words as $word)
{
	$newstring .= $word;
}

$newstring = str_replace("+", " ", $newstring);
echo '<p>'.$frase.'</p>';
echo '<p>'.$newstring.'</p>';
?>

That gives this output:

as kingfishers catch fire
f iz ssox mq thm r err y

~Brett