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我使用以下代码检查外部 pdf 的文件大小。但是如果外部服务器在 1 秒内没有响应,我想添加一个超时并跳过。我怎样才能做到这一点?

我当前的代码:

<?php
$newmanual = "https://www.example.com/file.pdf"
$head = array_change_key_case(get_headers($newmanual, TRUE)); 
$filesize = $head['content-length'];?>
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1 回答 1

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Curl 有一个超时功能,您可以使用它来获取标题。

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://www.example.com/file.pdf");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
//get only headers
curl_setopt($ch, CURLOPT_NOBODY, 1);
// The number of seconds to wait while trying to connect. Use 0 to wait indefinitely.
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 1); 
// The maximum number of seconds to allow cURL functions to execute.
curl_setopt($ch, CURLOPT_TIMEOUT, 20); //timeout in seconds

$output = curl_exec($ch);
// close handle
curl_close($ch);

$headers = [];
$data = explode("\n",$output);
$headers['status'] = $data[0];
array_shift($data);

foreach($data as $part){
    $middle=explode(":",$part);
    $headers[trim($middle[0])] = trim($middle[1]);
}

echo "<pre>";
var_dumo(headers);

从帖子中获取的代码如何设置 curl 超时从 php curl 获取标头

于 2018-12-29T23:08:36.017 回答