public function encodeImage(ImageCaptcha $ci)
{
$w = $ci->getCaptcha()->getWidth();
$h = $ci->getCaptcha()->getHeight();
$svg = '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="' . $w . '" height="' . $h . '">';
$svg .= '<rect width="' . $w . '" height="' . $h . '" style="fill:' . $ci->getBackgroundColor() . ';stroke-width:1;stroke:' . $ci->getBorderColor() . '"/>';
$lines = $ci->getLines();
foreach ($lines as $line) {
$svg .= '<line x1="' . $line['x1'] . '" y1="' . $line['y1'] . '" x2="' . $line['x2'] . '" y2="' . $line['y2'] . '" style="stroke:' . $line['color'] . ';stroke-width:' . $line['width'] . '"/>';
}
$text = $ci->getText();
$fontSize = $ci->getCaptcha()->getFontSize();
$x = ($w - $fontSize * strlen(str_replace(' ', '', $text))) / 2;
$y = $h / 2;
$spacing = $ci->getCaptcha() instanceof MathCaptcha ? 0 : 7;
$fixedStyle = 'dominant-baseline: central;font-family:Arial;letter-spacing:0px;';
for ($i = 0; $i < strlen($text); $i++) {
$angle = $ci->randAngle();
$color = $ci->randColor();
$style = $fixedStyle . 'font-size:' . $fontSize . 'pt;';
$transform = "translate({$x}, {$y}) rotate({$angle}) translate(-{$x}, -{$y})";
$svg .= '<text x="' . $x . '" y="' . $y . '" fill="' . $color . '" style="' . $style . '" transform="' . $transform . '">' . $text[$i] . '</text>';
$x += $spacing + ($this->isChar($text[$i]) ? $fontSize : $fontSize / 2);
}
$svg .= '</svg>';
return 'data:image/svg+xml;base64,' . base64_encode($svg);
}
public function output()
{
$img = new ImageCaptcha($this->_config, $this->_seccode);
$img->createImage();
}
public function encodeImage(ImageCaptcha $ci)
{
$w = $ci->getCaptcha()->getWidth();
$h = $ci->getCaptcha()->getHeight();
$image = imagecreatetruecolor($w, $h);
imagefilledrectangle($image, 0, 0, $w, $h, $this->toHex($ci->getBackgroundColor()));
imagerectangle($image, 0, 0, $w - 1, $h - 1, $this->toHex($ci->getBorderColor()));
// border
$lines = $ci->getLines();
foreach ($lines as $line) {
$color = $this->toHex($line['color']);
imageline($image, $line['x1'], $line['y1'], $line['x2'], $line['y2'], $color);
}
$fontSize = $ci->getCaptcha()->getFontSize();
$box = imagettfbbox($fontSize, 0, $this->font, '0');
$spacing = $ci->getCaptcha() instanceof MathCaptcha ? 0 : 5;
$text = $ci->getText();
$x = ($w - $fontSize * strlen(str_replace(' ', '', $text))) / 2;
$y = $h / 2 - ($box[3] - $box[5]) / 2 + $fontSize;
for ($i = 0; $i < strlen($text); $i++) {
$angle = $ci->randAngle();
$color = $this->toHex($ci->randColor());
$box = imagettftext($image, $fontSize, $angle, $x, $y, $color, $this->font, $text[$i]);
$x += $spacing + ($box[2] - $box[0]);
}
$temp = tempnam(sys_get_temp_dir(), 'captcha');
imagepng($image, $temp);
$data = fread(fopen($temp, 'r'), filesize($temp));
$base64 = base64_encode($data);
imagedestroy($image);
unlink($temp);
return 'data:image/png;base64,' . $base64;
}
