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captcha.php 0000644 00000005705 15026516350 0006672 0 ustar 00 <?php /******************************************************************************************************************** * This script is brought to you by Vasplus Programming Blog by whom all copyrights are reserved. * Website: www.vasplus.info * Email: info@vasplus.info * Please, do not remove this information from the top of this page. *********************************************************************************************************************/ session_start(); //You can do any necessary settings as you wish here //If you reduce the width and height of the captcha here then you have to change it in the css file as well $image_width = 280; $image_height = 50; $characters_on_image = 6; //Number of characters to display on the captcha image $font = 'images/monofont.ttf'; //The characters that can be used in the CAPTCHA code. Avoid confusing characters (l 1 and i for example) $possible_letters = 'abcdfghjkmnpqrstvwxyz123456789ABC'; $random_dots = 0; $random_lines = 20; $captcha_text_color="4caf50"; //Text color $captcha_noice_color = "7fbf4d"; //Text color $code = ''; $i = 0; while ($i < $characters_on_image) { $code .= substr($possible_letters, mt_rand(0, strlen($possible_letters)-1), 1); $i++; } $font_size = $image_height * 0.75; $image = @imagecreate($image_width, $image_height); /*Setting the background, text and noise colours here */ $background_color = imagecolorallocate($image, 255, 255, 255); $arr_text_color = RGB_HEX($captcha_text_color); $text_color = imagecolorallocate($image, $arr_text_color['red'], $arr_text_color['green'], $arr_text_color['blue']); $arr_noice_color = RGB_HEX($captcha_noice_color); $image_noise_color = imagecolorallocate($image, $arr_noice_color['red'], $arr_noice_color['green'], $arr_noice_color['blue']); /*This generates the dots randomly strings in background */ for( $i=0; $i<$random_dots; $i++ ) { imagefilledellipse($image, mt_rand(0,$image_width), mt_rand(0,$image_height), 2, 3, $image_noise_color); } /*This generates lines randomly strings in background of image */ for( $i=0; $i<$random_lines; $i++ ) { imageline($image, mt_rand(0,$image_width), mt_rand(0,$image_height), mt_rand(0,$image_width), mt_rand(0,$image_height), $image_noise_color); } /*This creates a text box and add 6 letters code in it */ $textbox = imagettfbbox($font_size, 0, $font, $code); $x = ($image_width - $textbox[4])/2; $y = ($image_height - $textbox[5])/2; imagettftext($image, $font_size, 0, $x, $y, $text_color, $font , $code); /* Show captcha image in the page html page */ header('Content-Type: image/jpeg');// defining the image type to be shown in browser widow imagejpeg($image);//showing the image imagedestroy($image);//destroying the image instance $_SESSION['captcha_code'] = $code; function RGB_HEX ($hexstr) { $int = hexdec($hexstr); return array("red" => 0xFF & ($int >> 0x10),"green" => 0xFF & ($int >> 0x8),"blue" => 0xFF & $int); } ?>