This class can generate images for user CAPTCHA validation.
It can generate a random alphanumeric text of random length between 4 and 8 characters for CAPTCHA validation.
The class can also generate a JPEG image with the random validation text displayed in it. The generated image saved to a server file.
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//https://www.phpclasses.org/package/10210-PHP-Generate-images-for-user-CAPTCHA-validation.html
<?php class="" easycaptcha="" {="" private="" $chars="abcdefghijklmnopqrstuvwxyz0123456789" ;="" private="" $finalchar;="" public="" function="" generatestring()="" {="" $size="rand(4," 8);="" echo="" $size;="" $temp="" ;="" for="" ($i="0;" $i=""?>< $size;="" $i++)="" {="" $temp.="$this-">chars[rand(0, strlen($this->chars) - 1)];
}
$this->finalChar = $temp;
return $this->finalChar;
}
public function generateImage($urlImage=null) {
$im = imagecreatetruecolor(120, 40);
$val = (string) $this->finalChar;
$text_color = imagecolorallocate($im, 255, 255, 255);
imagestring($im, 15, 15, 15, $val, $text_color);
if($urlImage == null){
imagejpeg($im, 'captcha.jpg', 100);
imagedestroy($im);
echo "";
}
else{
imagejpeg($im, $urlImage.'captcha.jpg', 100);
imagedestroy($im);
echo "![](".$urlImage."captcha.jpg)";
// assets/uploadimg/captcha.jpg ---- example of url
}
}
}
/* way to use */
// assets/uploadimg/captcha.jpg ---- example of url
/* session_start();
$obj = new EasyCaptcha();
$_SESSION["captcha"] =$obj->generateString();
$obj->generateImage();
echo $_SESSION["captcha"]; */
?>
origin - http://www.pipiscrew.com/?p=7239 easy-php-captcha