Question

I’m trying to develop a captcha class for my website everything was doing fine until I tried to embed the image generated with PHP GD inside my subscription form!

Here is the code of my class:

<?php //captcha.php header('Content-type: image/png');   class Captcha  {     // some attributes bla bla    public function __construct($new_string_length,$new_width_picture,                               $new_height_picture,$new_string_color) {      $this->string_length = $new_string_length;     $this->width_picture = $new_width_picture;     $this->height_picture = $new_height_picture;     $this->string_color = $new_string_color;    }    public function getString() {     return $this->string;   }    public function generateRandomString() {     $str = '';     $basket = 'abcdefghijklmnopqrstuvwxyz0123456789';     $basket_length = strlen($basket);     srand ((double) microtime() * 1000000);     for($i=0;$i<$this->string_length;$i++) {          $generated_pos = rand(0,$basket_length);         $str_substr = substr($basket,$generated_pos-1,1);         if(!is_numeric($str_substr)) {            // if the character picked up isn't numeric           if(rand(0,1)==1) {             // we randomly upper the character             $str_substr = strtoupper($str_substr);           }         }         $str = $str.$str_substr;     }      $this->string = $str;   }     **public function generatePictureFromString($new_string) {       $root_fonts = '../fonts/';       srand ((double) microtime() * 1000000);       $list_fonts = array('ABODE.ttf','acme.ttf','Alcohole.ttf',                    'Anarchistica.ttf','AMERIKAA.ttf');        $image = @imagecreatetruecolor($this->width_picture,$this->height_picture);       $noir  = imagecolorallocate($image,0,0,0);       $clr = explode('/',$this->string_color);       $clr = imagecolorallocate($image,$clr[0],$clr[1],$clr[2]);           for($i=0;$i<strlen($new_string);$i++) {                   imagettftext($image,rand(($this->height_picture/4.3),($this->height_picture)/4.2),            rand(-45,45),($this->width_picture)/(5*$this->string_length)+($this->width_picture)/($this->string_length)*$i,0.6*($this->height_picture),$clr,            $root_fonts.$list_fonts[rand(0,count($list_fonts)-1)],substr($new_string,$i,1));       }        imagepng($image);       imagedestroy($image);    }**  } 

I willingly avoided to show some useless part of the class. The class itself works perfectly when I call the generatePictureFromString(..) method like this:

<?php //testeur_classe.php require_once '../classes/captcha.php';  $captcha = new Captcha(5,200,80,'255/255/255'); $captcha->generateRandomString(); $str  = $captcha->getString(); $captcha->generatePictureFromString($str);  ?> 

But when I try to insert the picture generated in my form using:

<img src='<?php echo PATH_ROOT.'classes\testeur_classe.php'; ?>'/> 

nothing is displayed!

How am I supposed to do that ?

Thank you!

Answer 1

You need to make sure that the image src is a valid URL to the script. Looking at the backslash in there my guess would be that that is in fact a filesystem path.