php stream_get_contents,PHP stream_get_contents 用法 手册 | 示例代码
vasiliy at hotger dot com
It is important to know that stream_get_contents behaves differently with different versions of PHP. Consider the following
$handle=fopen('file','w+');// truncate + attempt to createfwrite($handle,'12345');// file position > 0rewind($handle);// position = 0$content=stream_get_contents($handle);// file position = 0 in PHP 5.1.6, file position > 0 in PHP 5.2.17!fwrite($handle,'6789');fclose($handle);/**
*
* 'file' content
*
* PHP 5.1.6:
* 67895
*
* PHP 5.2.17:
* 123456789
*
*/?>
As a result, stream_get_contents() affects file position in 5.1, and do not affect file position in 5.2 or better.
clarck dot smith at gmail dot com
In that case when stream_get_contents/fread/fgets or other stream reading functions block indefinitely your script because they don't reached the limit of bytes to read use the socket_get_meta_data function to figure out the number of the bytes to read. It returns an array that contains a key named 'unread_bytes' and then pass that number to your favourite stream reading functions second parameter to read from the stream.
Maybe a good workaround to use the stream_select function, and set the socket to non-blocking mode with the use of stream_set_blocking($stream, 0). In this case the socket reading functions work properly.
Cheers, Ervin
m rahman
When omitting the parameter $maxlength, any received bytes are stacked up until the underlying stream is not readable anymore, the the function returns that stack in one piece.
Mike Shiyan
stream_get_contents() can be used instead of fread() even with local files.
divinity76+nospam at gmail dot com
/*
* problem: stream_get_contents blocks / is very slow.
* I have tried
* 1: stream_set_blocking, doesn't make a difference.
* 2: stream_get_meta_data['unread_bytes'] = ITS BUGGED, ALWAYS SAYS 0.
* 3: feof(): ALSO EFFING BLOCKING
* 4: my_stream_get_contents hack... kinda working! :D
*/
function my_stream_get_contents ($handle, $timeout_seconds = 0.5)
{
$ret = "";
// feof ALSO BLOCKS:
// while(!feof($handle)){$ret.=stream_get_contents($handle,1);}
while (true) {
$starttime = microtime(true);
$new = stream_get_contents($handle, 1);
$endtime = microtime(true);
if (is_string($new) && strlen($new) >= 1) {
$ret .= $new;
}
$time_used = $endtime - $starttime;
// var_dump('time_used:',$time_used);
if (($time_used >= $timeout_seconds) ! is_string($new)
(is_string($new) && strlen($new) < 1)) {
break;
}
}
return $ret;
}
Anonymous
It seems that using fiddler as a proxy in the stream context options causes this function to throw a warning:
Warning: stream_get_contents() [function.stream-get-contents]: SSL: An existing connection was forcibly closed by the remote host.
finalmau at gmail dot com
some times this functions cause an max execution time time error, Why?
Simple, if you use it the function wait for have the specified byte length into the resource or the end of file, but, several times this not happend, so we need implement an artificial flag like this:
$tmp = stream_get_contents($this->socket, 42);
while($tmp[42] != 'N'){
//Your code...
$tmp = stream_get_contents($this->socket, 42);
}