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I am trying to create an image verification page using these two files

 

<?php
//this function is called recursivelly
  function random_string($len=5, $str='')
  {
for($i=1; $i<=$len; $i++)
        {
        //generates a random number that will be the ASCII code of the character.
//We only want numbers (ascii code from 48 to 57) and caps letters. 
 $ord=rand(48, 90);
 if((($ord >= 48) && ($ord <= 57)) || (($ord >= 65) && ($ord<= 90))) 
$str.=chr($ord);
 //If the number is not good we generate another one
else
	$str.=random_string(1);	                                       
}
return $str;
}
                                       
//create the random string using the upper function 
//(if you want more than 5 characters just modify the parameter)
$rand_str=random_string(5);
                                    
//We memorize the md5 sum of the string into a session variable
$_SESSION['image_value'] = md5($rand_str);
                              
//Get each letter in one valiable, we will format all letters different
$letter1=substr($rand_str,0,1);
$letter2=substr($rand_str,1,1);
$letter3=substr($rand_str,2,1);
$letter4=substr($rand_str,3,1);
$letter5=substr($rand_str,4,1);
                                       
//Creates an image from a png file. If you want to use gif or jpg images, 
//just use the coresponding functions: imagecreatefromjpeg and imagecreatefromgif.

//$image=imagecreatefrompng("images/noise.png");
//$image=imagecreatefrompng("fonts/noise.png");

$image=imagecreatefromjpeg("fonts/noise.jpg");

//$image=imagecreatefromgif("fonts/noise.gif");

//Get a random angle for each letter to be rotated with.
$angle1 = rand(-20, 20);
$angle2 = rand(-20, 20);
$angle3 = rand(-20, 20);
$angle4 = rand(-20, 20);
$angle5 = rand(-20, 20);
                                 
//Get a random font. (In this examples, the fonts are located in "fonts" directory and named from 1.ttf to 10.ttf)
$font1 = "fonts/".rand(1, 10).".ttf";
$font2 = "fonts/".rand(1, 10).".ttf";
$font3 = "fonts/".rand(1, 10).".ttf";
$font4 = "fonts/".rand(1, 10).".ttf";
$font5 = "fonts/".rand(1, 10).".ttf";
                                       
//Define a table with colors (the values are the RGB components for each color).
$colors[0]=array(122,229,112);
$colors[1]=array(85,178,85);
$colors[2]=array(226,108,97);
$colors[3]=array(141,214,210);
$colors[4]=array(214,141,205);
$colors[5]=array(100,138,204);
                                       
//Get a random color for each letter.
$color1=rand(0, 5);
$color2=rand(0, 5);
$color3=rand(0, 5);
$color4=rand(0, 5);
$color5=rand(0, 5);
                                       
//Allocate colors for letters.
$textColor1 = imagecolorallocate ($image, $colors[$color1][0],$colors[$color1][1], $colors[$color1][2]);
$textColor2 = imagecolorallocate ($image, $colors[$color2][0],$colors[$color2][1], $colors[$color2][2]);
$textColor3 = imagecolorallocate ($image, $colors[$color3][0],$colors[$color3][1], $colors[$color3][2]);
$textColor4 = imagecolorallocate ($image, $colors[$color4][0],$colors[$color4][1], $colors[$color4][2]);
$textColor4 = imagecolorallocate ($image, $colors[$color5][0],$colors[$color5][1], $colors[$color5][2]);

Write text to the image using TrueType fonts.
$size = 20;
imagettftext($image, $size, $angle1, 10, $size+15, $textColor1, $font1, $letter1);
imagettftext($image, $size, $angle2, 35, $size+15, $textColor2, $font2, $letter2);
imagettftext($image, $size, $angle3, 60, $size+15, $textColor3, $font3, $letter3);
imagettftext($image, $size, $angle4, 85, $size+15, $textColor4, $font4, $letter4);
imagettftext($image, $size, $angle5, 110, $size+15, $textColor5, $font5, $letter5);

header('Content-type: image/jpeg');
Output image to browser
imagejpeg($image);
Destroys the image
imagedestroy($image); 
?>

 

and the second one to show the iamge

 

<?php
session_start();
?>
<HTML>
<HEAD>
<TITLE>Random image sample</TITLE>
<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=iso-8859-1\">
</HEAD>
<BODY>
<?php
$errors=0;
if(isset($_POST['Submit']))
{
$number = $_POST['number'];
if(md5($number) != $_SESSION['image_value'])
echo '<h1>Validation string not valid! Please try again!</h1>';
else
{
echo '<h1>Your string is valid!</h1>';
//do what you want with the data
}
}
?>
<form name="form1" method="post" action="random_sample.php">
<table cellspacing="0" width="600" align="center">
<tr><td valign="top" align="right">Comments</td>
<td><input name="message" size=40 value="...your message here">
</td></tr>
<tr><td colspan=2 align="center">
<font size="1" face="Geneva, Arial, Helvetica, sans-serif"><strong><font size="2">
Please enter the string shown in the image in the form.<br> The possible characters are letters from A to Z in capitalized form and the numbers from 0 to 9.
</font></td></tr>
<tr><td align="center" colspan=2><input name="number" type="text" id=\"number\"></td></tr>
<tr><td colspan=2 align="center"><img src="random_image.php"><br><img src="fonts/noise.png"></td></tr>
<tr><td colspan=2 align="center"><input name="Submit" type="submit"
value="Submit"></td></tr>
</table>
</form>
</BODY>
</HTML>

 

the file does not show the graphics to decipher.

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