// 从query中提取参数
$args = array_keys($opts);
foreach ($args as $arg) {
if (isset($_GET[$arg])) {
$opts[$arg] = $_GET[$arg];
}
}
// 解码text参数
$opts['text'] = urldecode($opts['text']);
// 把size展开成width和height
$size = $opts['size'];
if (is_numeric($size)) {
$opts['width'] = $opts['height'] = $size;
} elseif (preg_match('/(\\d+)\\s*[^\\d]+\\s*(\\d+)/i', $size, $match)) {
list(, $opts['width'], $opts['height']) = $match;
}
// 更新size和fontSize
if (isset($opts['fontSize'])) {
$opts['size'] = $opts['fontSize'];
unset($opts['fontSize']);
} else {
unset($opts['size']);
}
// 默认展示帮助页面
if (!$opts['width']) {
die(file_get_contents('help.html'));
}
// 输出图片
$placeholder = new Placeholder($opts);
$placeholder->showImage();
