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GuitarGod

Help with PHP ImageCreate

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Hey guys,

I recently tried to create an image which would change it's text, font, background-colour etc when the page was refreshed (similar to a confirmation code image that you often see on registration pages. I put the code in a file named [i]confirmation_code.php[/i], when i visit this file, the image works fine, but when i include the file on other pages, i get an error code and the image doesn't work either. Can anyone please help me or tell me what i'm doing wrong?

The code for confirmation_code.php:
[code]<?php
$chars = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ23456789";

srand((double)microtime()*1000000);
$i = 0;

$code_length = 5;

$code_return = ' ' ;

while ($i <= $code_length)
{
$num = rand() % 33;
$tmp = substr($chars, $num, 1);
$code_return = $code_return . $tmp;
$i++;
}

// ----
// Generate the text angle

for ($i = 0; $i < 15; $i++)
{
$angle[] = $i;
}

srand ((double) microtime() * 1000000);
  $random_angle = rand(0,count($angle)-1);

// ----
// Generate the background image colour

$bg_colour[] = array("255", "255", "204");
$bg_colour[] = array("255", "255", "153");
$bg_colour[] = array("255", "255", "102");
$bg_colour[] = array("255", "255", "51");
$bg_colour[] = array("255", "255", "0");
$bg_colour[] = array("255", "204", "255");
$bg_colour[] = array("255", "204", "204");
$bg_colour[] = array("255", "204", "153");
$bg_colour[] = array("255", "204", "102");
$bg_colour[] = array("255", "204", "51");
$bg_colour[] = array("255", "204", "0");
$bg_colour[] = array("255", "153", "255");
$bg_colour[] = array("255", "153", "204");
$bg_colour[] = array("255", "153", "153");
$bg_colour[] = array("255", "153", "102");
$bg_colour[] = array("255", "153", "51");
$bg_colour[] = array("255", "153", "0");
$bg_colour[] = array("255", "102", "255");
$bg_colour[] = array("255", "102", "204");
$bg_colour[] = array("255", "102", "153");
$bg_colour[] = array("255", "102", "102");
$bg_colour[] = array("255", "102", "51");
$bg_colour[] = array("255", "102", "0");
$bg_colour[] = array("255", "51", "255");
$bg_colour[] = array("255", "51", "204");
$bg_colour[] = array("255", "51", "153");
$bg_colour[] = array("255", "51", "102");
$bg_colour[] = array("255", "51", "51");
$bg_colour[] = array("255", "51", "0");
$bg_colour[] = array("255", "0", "255");
$bg_colour[] = array("255", "0", "204");
$bg_colour[] = array("255", "0", "153");
$bg_colour[] = array("255", "0", "102");
$bg_colour[] = array("255", "0", "51");
$bg_colour[] = array("255", "0", "0");

srand ((double) microtime() * 1000000);
  $random_bg_colour = rand(0,count($bg_colour)-1);

// ----
// Generate the text colour

$txt_colour[] = array("0", "255", "204");
$txt_colour[] = array("0", "255", "153");
$txt_colour[] = array("0", "255", "102");
$txt_colour[] = array("0", "255", "51");
$txt_colour[] = array("0", "255", "0");
$txt_colour[] = array("0", "204", "255");
$txt_colour[] = array("0", "204", "204");
$txt_colour[] = array("0", "204", "153");
$txt_colour[] = array("0", "204", "102");
$txt_colour[] = array("0", "204", "51");
$txt_colour[] = array("0", "204", "0");
$txt_colour[] = array("0", "153", "255");
$txt_colour[] = array("0", "153", "204");
$txt_colour[] = array("0", "153", "153");
$txt_colour[] = array("0", "153", "102");
$txt_colour[] = array("0", "153", "51");
$txt_colour[] = array("0", "153", "0");
$txt_colour[] = array("0", "102", "255");
$txt_colour[] = array("0", "102", "204");
$txt_colour[] = array("0", "102", "153");
$txt_colour[] = array("0", "102", "102");
$txt_colour[] = array("0", "102", "51");
$txt_colour[] = array("0", "102", "0");
$txt_colour[] = array("0", "51", "255");
$txt_colour[] = array("0", "51", "204");
$txt_colour[] = array("0", "51", "153");
$txt_colour[] = array("0", "51", "102");
$txt_colour[] = array("0", "51", "51");
$txt_colour[] = array("0", "51", "0");
$txt_colour[] = array("0", "0", "255");
$txt_colour[] = array("0", "0", "204");
$txt_colour[] = array("0", "0", "153");
$txt_colour[] = array("0", "0", "102");
$txt_colour[] = array("0", "0", "51");
$txt_colour[] = array("0", "0", "0");

srand ((double) microtime() * 1000000);
  $random_txt_colour = rand(0,count($txt_colour)-1);

// ----
// Generate the font for the image

$font[] = "georgia.ttf";
$font[] = "comic.ttf";
$font[] = "trebucbi.ttf";
$font[] = "timesbd.ttf";
$font[] = "impact.ttf";

srand ((double) microtime() * 1000000);
  $random_font = rand(0,count($font)-1);

// ----
// Now that the code has been generated, time to place it onto an image

Header("Content-type: image/png");

$w = 250;

$h = 70;

$im = ImageCreate($w, $h);

$background_color = imagecolorallocate($im, $bg_colour[$random_bg_colour][0], $bg_colour[$random_bg_colour][1], $bg_colour[$random_bg_colour][2]);

$text = ImageColorAllocate($im, $txt_colour[$random_txt_colour][0], $txt_colour[$random_txt_colour][1], $txt_colour[$random_txt_colour][2]);

ImageRectangle($im,0,0,$w - 1,$h - 1,$BorderColor); 

ImageFtText ($im, 16, $random_angle, 50, 50, $text, "$font[$random_font]", "$code_return", array());

ImagePng($im);

ImageDestroy($im);
?>[/code]

MOD EDIT : Please use code tags

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BTW,

You place the image on the page and the user types the same characters into a text box and submits the form.

With your image code, how do you now verify the user entered the same characters?

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It works!! :D Dude, if you were here i'd bow down to you!!

As for your question, what i planned to do was create a session containing the generated code, then compare the code the user has entered with the session.

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You could generate the random code outside the image, store in session var then pass it to the image code

$key = gen_rand_string();
$_SESSION['key'] = $key;

echo "<img src=\"confirmation_code.php?text=$key\">";

EDIT : Ignore this. Better to generate and save from within the image code, then it doesn't appear in page source.

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