public static function calocVerify($type = 'png', $width = 170, $height = 45, $font = 'tahoma.ttf', $verifyName = 'verifyCode')
{
$la = rand(0, 9);
$ba = rand(0, 9);
$randnum = rand(1, 3);
if ($randnum == 3) {
if ($la < $ba) {
$tmp = $la;
$la = $ba;
$ba = $tmp;
}
}
$randarr = [1 => $la + $ba, 2 => $la * $ba, 3 => $la - $ba];
$randstr = $randarr[$randnum];
$randResult = [1 => $la . '+' . $ba . '=?', 2 => $la . '*' . $ba . '=?', 3 => $la . '-' . $ba . '=?'];
$randval = $randResult[$randnum];
$authKey = md5(mt_rand() . microtime());
Cookie::set($verifyName, $authKey);
Model::getInstance()->cache()->set($authKey, $randstr, 1800);
//$width = ($length * 10 + 10) > $width ? $length * 10 + 10 : $width;
if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
$im = imagecreatetruecolor($width, $height);
} else {
$im = imagecreate($width, $height);
}
$r = array(225, 255, 255, 223);
$g = array(225, 236, 237, 255);
$b = array(225, 236, 166, 125);
$key = mt_rand(0, 3);
$backColor = imagecolorallocate($im, $r[$key], $g[$key], $b[$key]);
//背景色（随机）
$borderColor = imagecolorallocate($im, 100, 100, 100);
//边框色
imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
$stringColor = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
// 干扰
for ($i = 0; $i < 10; $i++) {
imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $stringColor);
}
for ($i = 0; $i < 25; $i++) {
imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $stringColor);
}
for ($i = 0; $i < 5; $i++) {
// imagestring($im, 5, $i * 10 + 5, mt_rand(1, 8), $randval{$i}, $stringColor);
$x = $i === 0 ? 20 : $i * 50;
$stringColor = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
if ($i == 1 || $i == 3 || $i == 4) {
$fontSize = $randnum == 3 ? 50 : 28;
if ($i == 1) {
imagettftext($im, $fontSize, 0, $x, 35, $stringColor, CML_EXTEND_PATH . DIRECTORY_SEPARATOR . $font, $randval[$i]);
} else {
$decNum = $i == 3 ? 30 : 55;
imagettftext($im, 25, 0, $x - $decNum, 35, $stringColor, CML_EXTEND_PATH . DIRECTORY_SEPARATOR . $font, $randval[$i]);
}
} else {
imagettftext($im, 28, mt_rand(0, 60), $x, 35, $stringColor, CML_EXTEND_PATH . DIRECTORY_SEPARATOR . $font, $randval[$i]);
}
}
self::output($im, $type);
}