停止在页面加载时下载文件

Question

我有以下抓取器正在下载空文件并将它们保存到我的文件夹中。 所以我喜欢20k视频文件，每个都是40kb。 我怎么能得到它所以这个脚本将不会DL直到表单提交。

$rename = substr(md5(rand(0,9999)), 17, 10); 
$ch = curl_init("$vid");
$fp = fopen("$rename.m4v", "w");

curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_exec($ch);
curl_close($ch);
fclose($fp);
$url_insert = "/dom/";

Answer 1

if(isset($_POST['some-form-item'])){

$rename = substr(md5(rand(0,9999)), 17, 10); 
$ch = curl_init("$vid");
$fp = fopen("$rename.m4v", "w");

curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_exec($ch);
curl_close($ch);
fclose($fp);
$url_insert = "/dom/";

}

只有当表格中贴有内容时才会运行，将顶部的if更改为posteD中的项目？

Answer 2

<?

if(isset($_POST["submit"])) {

$rename = substr(md5(rand(0,9999)), 17, 10); 
$ch = curl_init("$vid");
$fp = fopen("$rename.m4v", "w");

curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_exec($ch);
curl_close($ch);
fclose($fp);
$url_insert = "/dom/";

}

为此，必须将提交按钮的name元素设置为submit。

即： <input type="submit" name="submit" />