我想了解PHP中的curl/fopen。以下功能正常工作,但我希望在某些时候可以看到fwrite。为什么此代码在没有fwrite语句的情况下工作?
function cURLdownload($url, $file)
{
if(!cURLcheckBasicFunctions()) return "UNAVAILABLE: cURL Basic Functions";
$ch = curl_init();
if($ch)
{
$fp = fopen($file, "w");
if($fp)
{
if(!curl_setopt($ch, CURLOPT_URL, $url))
{
fclose($fp); // to match fopen()
curl_close($ch); // to match curl_init()
return "FAIL: curl_setopt(CURLOPT_URL)";
}
if(!curl_setopt($ch, CURLOPT_FILE, $fp)) return "FAIL: curl_setopt(CURLOPT_FILE)";
if(!curl_setopt($ch, CURLOPT_HEADER, 0)) return "FAIL: curl_setopt(CURLOPT_HEADER)";
if(!curl_exec($ch)) return "FAIL: curl_exec()";
curl_close($ch);
fclose($fp);
return "SUCCESS: $file [$url]";
}
else return "FAIL: fopen()";
}
else return "FAIL: curl_init()";
}