/**
* 生成验证码，使用TTF字体
* @param $font
* @param $img_width
* @param $img_height
* @return unknown_type
*/
static function verify_ttf($font, $width = 180, $height = 130)
{
if (empty($_SESSION)) {
session_start();
}
$length = 4;
$code = RandomKey::getChineseCharacter(4);
$width = $length * 45 > $width ? $length * 45 : $width;
$_SESSION['authcode'] = md5($code);
$im = imagecreatetruecolor($width, $height);
$borderColor = imagecolorallocate($im, 100, 100, 100);
//边框色
$bkcolor = imagecolorallocate($im, 250, 250, 250);
imagefill($im, 0, 0, $bkcolor);
imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
// 干扰
for ($i = 0; $i < 15; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $fontcolor);
}
for ($i = 0; $i < 255; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $fontcolor);
}
for ($i = 0; $i < $length; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120));
//这样保证随机出来的颜色较深。
$codex = self::msubstr($code, $i, 1);
imagettftext($im, mt_rand(16, 20), mt_rand(-60, 60), 40 * $i + 20, mt_rand(30, 35), $fontcolor, $font, $codex);
}
Header("Content-type: image/png");
//告诉浏览器，下面的数据是图片
ImagePng($im);
//生成png格式
ImageDestroy($im);
}
/**
* 生成汉字验证码
* @param $font
* @param $width
* @param $height
* @return array
*/
static function verifycode_chinese($font, $width = 180, $height = 60)
{
$length = 4;
$angle = 45;
$width = $length * 45 > $width ? $length * 45 : $width;
$im = imagecreatetruecolor($width, $height);
$borderColor = imagecolorallocate($im, 100, 100, 100);
//边框色
$bkcolor = imagecolorallocate($im, 250, 250, 250);
imagefill($im, 0, 0, $bkcolor);
imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
// 干扰
for ($i = 0; $i < 5; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $fontcolor);
}
for ($i = 0; $i < 255; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $fontcolor);
}
$code = '';
for ($i = 0; $i < $length; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120));
//这样保证随机出来的颜色较深。
$codex = RandomKey::getChineseCharacter(1);
$code .= $codex;
@imagettftext($im, mt_rand(16, 20), mt_rand(-$angle, $angle), 40 * $i + 20, mt_rand(30, 35), $fontcolor, $font, $codex);
}
ob_start();
ImagePng($im);
$data = ob_get_clean();
ImageDestroy($im);
return array('code' => $code, 'image' => $data);
}
