对象说明了一切。我需要启动一个网站流并在找到例如时停止它</head>
。我想这样做是为了保留两端的带宽并节省脚本运行时间。
我不想将整个页面内容下载到内存中;我需要在 PHP 中以块形式出现的内容流。
谢谢社区,我爱你们:)
<?php
function streamUntilStringFound($url, $string, $timeout = 30){
// remove the protocol - prevent the errors
$url = parse_url($url);
unset($url['scheme']);
$url = implode("", $url);
// start the stream
$fp = @fsockopen($url, 80, $errno, $errstr, $timeout);
if (!$fp) {
$buffer = "Invalid URL!"; // use $errstr to show the exact error
} else {
$out = "GET / HTTP/1.1\r\n";
$out .= "Host: $url\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
$buffer = "";
while (!feof($fp)) {
$buffer .= fgets($fp, 128);
// string found - stop downloading any new content
if (strpos(strtolower($buffer), $string) !== false) break;
}
fclose($fp);
}
return $buffer;
}
// download all content until closing </head> is found
$content = streamUntilStringFound("whoapi.com", "</head>");
// show us what is found
echo "<pre>".htmlspecialchars($content);
?>
重要提示:( 感谢@GordonM)
allow_url_fopen
需要启用php.ini
才能使用fsockopen()
。