PHP循环卷曲请求一个接一个

Question

仅在收到curl响应时如何使foreach或for循环运行。

例如：

for ($i = 1; $i <= 10; $i++) {
 $ch = curl_init();
 curl_setopt($ch,CURLOPT_URL,"http://www.example.com");

 if(curl_exec($ch)){ // ?? - if request and data are completely received
   // ?? - go to the next loop
 }
 // DONT go to the next loop until the above data is complete or returns true
}

我不想让它移到下一个循环而又没有收到当前的curl请求数据..一个接一个，所以基本上它第一次打开url，等待请求数据，如果有匹配或实现了，那么转到下一个循环，

您不必为“卷曲”部分而烦恼，我只希望循环逐个移动（给定特定条件或某些条件）而不是一次全部移动

Answer 1

循环应该已经这样工作了，因为您正在使用阻塞的cURL接口，而不是cURL Multi接口。

$ch = curl_init();
for ($i = 1; $i <= 10; $i++)
{
    curl_setopt($ch, CURLOPT_URL, "http://www.example.com");
    $res = curl_exec($ch);
    // Code checking $res is not false, or, if you returned the page
    // into $res, code to check $res is as expected

    // If you're here, cURL call completed. To know if successfully or not,
    // check $res or the cURL error status.

    // Removing the examples below, this code will hit always the same site
    // ten times, one after the other.

    // Example
    if (something is wrong, e.g. False === $res)
        continue; // Continue with the next iteration

    Here extra code to be executed if call was *successful*

    // A different example
    if (something is wrong)
        break; // exit the loop immediately, aborting the next iterations

    sleep(1); // Wait 1 second before retrying
}
curl_close($ch);

Answer 2

您可以使用关键字打破循环break：

foreach ($list as $thing) {
    if ($success) {
        // ...
    } else {
        break;
    }
}