Output issues

[jcruz]

Hello, everyone. I'm quite new to PHP; I'm mostly acquainted with Java.

I wrote an application in Java that could change the base the characters in a string to bases 2-104 and that would output the string. After many, many headaches, I ported some of it to PHP. However, this code segment is not working for some odd reason. I have error reporting enabled in both PHP and Apache, yet I get no errors.

Any help would be greatly appreciated!

This is the code segment that is giving me trouble:

[code]elseif ($_POST['Encode'])
{

$input = $_POST['dectxt'];
$output = "";
for($counter = 0;$counter < (strlen($input));$counter++)
{
  $temp = ord(substr($input,$counter,1));
  if($temp > 255)
  {
  $output = "Invalid character detected.";
  break;
  }
  $temp2 = $marray[($POST_['base'])-2][temp];
  $output = $output.$temp2;
}

echo "<form action='index.php' method='POST'>
Text:<br><textarea cols='40' rows='10' wrap='virtual' name='dectxt'>" . $input . "</textarea><br>
Base:<br><input type='text' size='3' value='" . $_POST['base'] . "' name='base'><br>
<input type='submit' value='Encode' name='Encode'><br>
Text:<br><textarea cols='40' rows='10' wrap='virtual' name='enctxt'>" . $output . "</textarea><br>
<input type='submit' value='Decode' name='Decode'>";
}[/code]

[Jessica]

What is "not working"? What is the "trouble"?

JINX

[trq]

Define [i]not working[/i].

[jcruz]

;D Sorry.

Not working? Hmm, well, the text in the 'dectext' textarea is not getting processed by the upper code and displayed as correct output. In other words, it displays nothing. =/

[Jessica]

Where is $marray defined?
Did you try print_r($_POST) to make sure all your expected vars are set?
You can also try printing test at several points to see where the script is going.

[jcruz]

I'd post $marray here, but it's over 2,000 lines long.  ;)

print_r($_POST)? What exactly does this do? (Pardon my ignorance!)

Edit: $marray is a 2-dimensional array that has 104 elements downward and each element has 256 characters corresponding to ASCII values 0-255.

[Cagecrawler]

print_r displays information about a variable.  For example, if you use print_r($_POST), it'll display all of the array variables currently set and show their values.

[jcruz]

Let me try that then!

[Jessica]

you can always type php.net/(function) to get info on a function you don't know about :)

[jcruz]

[quote author=jesirose link=topic=121877.msg501904#msg501904 date=1168483537]
you can always type php.net/(function) to get info on a function you don't know about :)
[/quote]

Oh? Hmm, thanks for the advice! :)

I tried print_r, and all the variables were correctly displayed. =/

[code]Array ( [dectxt] => H [base] => 2 [Encode] => Encode [enctxt] => D )[/code]

Also, I noticed that in the $marray[][temp], a $ was missing. I added it, but still no dice.

[jcruz]

Nevermind, I resolved it. :D

It seems you can't put too much stuff within brackets ([]), so I declared a temporary variable which housed "$_POST['base'] - 2" and put it in the brackets.

I can't believe it works! It's completely backward compatible with my Java program. /drool

[Jessica]

Congrats.

[trq]

This line....

[code=php:0]
$temp2 = $marray[($POST_['base'])-2][temp];
[/code]

should be....

[code=php:0]
$temp2 = $marray[($_POST['base'])-2]['temp']];
[/code]