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<?php /*phptext class, version 1.0 created by www.w3schools.in (Gautam kumar) April 26, 2014 */ class phptextClass { public function phptext($text,$textColor,$backgroundColor='',$fontSize,$imgWidth,$imgHeight,$dir,$fileName) { /* settings */ $font = './calibri.ttf';/*define font*/ $textColor=$this->hexToRGB($textColor); $im = imagecreatetruecolor($imgWidth, $imgHeight); $textColor = imagecolorallocate($im, $textColor['r'],$textColor['g'],$textColor['b']); if($backgroundColor==''){/*select random color*/ $colorCode=array('#56aad8', '#61c4a8', '#d3ab92'); $backgroundColor = $this->hexToRGB($colorCode[rand(0, count($colorCode)-1)]); $backgroundColor = imagecolorallocate($im, $backgroundColor['r'],$backgroundColor['g'],$backgroundColor['b']); }else{/*select background color as provided*/ $backgroundColor = $this->hexToRGB($backgroundColor); $backgroundColor = imagecolorallocate($im, $backgroundColor['r'],$backgroundColor['g'],$backgroundColor['b']); } imagefill($im,0,0,$backgroundColor); list($x, $y) = $this->ImageTTFCenter($im, $text, $font, $fontSize); imagettftext($im, $fontSize, 0, $x, $y, $textColor, $font, $text); if(imagejpeg($im,$dir.$fileName,90)){/*save image as JPG*/ return json_encode(array('status'=>TRUE,'image'=>$dir.$fileName)); imagedestroy($im); } } public function phpcaptcha($textColor,$backgroundColor,$imgWidth,$imgHeight,$noiceLines=0,$noiceDots=0,$noiceColor='#162453') { /* Settings */ $text=$this->random(); $font = './font/monofont.ttf';/* font */ $textColor=$this->hexToRGB($textColor); $fontSize = $imgHeight * 0.75; $im = imagecreatetruecolor($imgWidth, $imgHeight); $textColor = imagecolorallocate($im, $textColor['r'],$textColor['g'],$textColor['b']); $backgroundColor = $this->hexToRGB($backgroundColor); $backgroundColor = imagecolorallocate($im, $backgroundColor['r'],$backgroundColor['g'],$backgroundColor['b']); /* generating lines randomly in background of image */ if($noiceLines>0){ $noiceColor=$this->hexToRGB($noiceColor); $noiceColor = imagecolorallocate($im, $noiceColor['r'],$noiceColor['g'],$noiceColor['b']); for( $i=0; $i<$noiceLines; $i++ ) { imageline($im, mt_rand(0,$imgWidth), mt_rand(0,$imgHeight), mt_rand(0,$imgWidth), mt_rand(0,$imgHeight), $noiceColor); }} if($noiceDots>0){/* generating the dots randomly in background */ for( $i=0; $i<$noiceDots; $i++ ) { imagefilledellipse($im, mt_rand(0,$imgWidth), mt_rand(0,$imgHeight), 3, 3, $textColor); }} imagefill($im,0,0,$backgroundColor); list($x, $y) = $this->ImageTTFCenter($im, $text, $font, $fontSize); imagettftext($im, $fontSize, 0, $x, $y, $textColor, $font, $text); imagejpeg($im,NULL,90);/* Showing image */ header('Content-Type: image/jpeg');/* defining the image type to be shown in browser widow */ imagedestroy($im);/* Destroying image instance */ if(isset($_SESSION)){ $_SESSION['captcha_code'] = $text;/* set random text in session for captcha validation*/ } } /*for random string*/ protected function random($characters=6,$letters = '23456789bcdfghjkmnpqrstvwxyz'){ $str=''; for ($i=0; $i<$characters; $i++) { $str .= substr($letters, mt_rand(0, strlen($letters)-1), 1); } return $str; } /*function to convert hex value to rgb array*/ protected function hexToRGB($colour) { if ( $colour[0] == '#' ) { $colour = substr( $colour, 1 ); } if ( strlen( $colour ) == 6 ) { list( $r, $g, $b ) = array( $colour[0] . $colour[1], $colour[2] . $colour[3], $colour[4] . $colour[5] ); } elseif ( strlen( $colour ) == 3 ) { list( $r, $g, $b ) = array( $colour[0] . $colour[0], $colour[1] . $colour[1], $colour[2] . $colour[2] ); } else { return false; } $r = hexdec( $r ); $g = hexdec( $g ); $b = hexdec( $b ); return array( 'r' => $r, 'g' => $g, 'b' => $b ); } /*function to get center position on image*/ protected function ImageTTFCenter($image, $text, $font, $size, $angle = 8) { $xi = imagesx($image); $yi = imagesy($image); $box = imagettfbbox($size, $angle, $font, $text); $xr = abs(max($box[2], $box[4])); $yr = abs(max($box[5], $box[7])); $x = intval(($xi - $xr) / 2); $y = intval(($yi + $yr) / 2); return array($x, $y); } } ?>