stream_filter_remove
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.
stream_get_contents
(PHP 5)
stream_get_contents — 残りのストリームを文字列に読み込む
説明
string stream_get_contents
( resource
$handle
[, int $maxlength = -1
[, int $offset = -1
]] )
file_get_contents() と似ていますが、
stream_get_contents() は既にオープンしている
ストリームリソースに対して操作を行います。そして、指定した
offset から始まる最大
maxlength バイトのデータを取得して文字列に
保存します。
パラメータ
返り値
文字列を返します。失敗した場合に FALSE を返します。
変更履歴
| バージョン | 説明 |
|---|---|
| 5.1.0 |
offset が追加されました。
|
例
例1 stream_get_contents() の例
<?php
if ($stream = fopen('http://www.example.com', 'r')) {
// オフセット 10 から開始して、残りのすべてのページを表示します
echo stream_get_contents($stream, -1, 10);
fclose($stream);
}
if ($stream = fopen('http://www.example.net', 'r')) {
// 最初の 5 バイトを表示します
echo stream_get_contents($stream, 5);
fclose($stream);
}
?>
注意
注意: この関数はバイナリデータに対応しています。
参考
- fgets() - ファイルポインタから 1 行取得する
- fread() - バイナリセーフなファイルの読み込み
- fpassthru() - ファイルポインタ上に残っているすべてのデータを出力する
add a note
User Contributed Notes
stream_get_contents - [7 notes]
m rahman ¶
2 years ago
vasiliy at hotger dot com ¶
1 year ago
It is important to know that stream_get_contents behaves differently with different versions of PHP. Consider the following
<?php
$handle = fopen('file', 'w+'); // truncate + attempt to create
fwrite($handle, '12345'); // file position > 0
rewind($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 ¶
1 year ago
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
Anonymous ¶
1 year ago
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 ¶
5 years ago
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);
}
Jim Keller ¶
6 years ago
Per wez (at php.net), "the trick is to tell the recipient how big the packet is, so that it can read the correct length."
In my own experience, when using PHP streams to send data bursts, the "max length" parameter seems to act more as an exact length parameter, as the stream will block indefinitely until max length is reached or until the other side fcloses() the stream. The latter is ok unless you need to keep the stream open to continue communication, in which case you have to let the receiving end know how much data to expect, or it will block indefinitely if the max length of data is not sent. You need to pack() and prepend the length of the outgoing data stream in the first 4 bytes of the packet, as follows:
function send_pkt($stream, $my_data)
{
$len = strlen($my_data);
$send_data = pack('N', $len) . $my_data; //Pack the length in a network-friendly way, then prepend it to the data.
$final_len = strlen($send_data);
if ( fwrite($stream, $send_data) < $final_len ) {
//something went wrong, trigger error
}
}
function recv_pkt($stream)
{
$packed_len = stream_get_contents($stream, 4); //The first 4 bytes contain our N-packed length
$hdr = unpack('Nlen', $packed_len);
$len = $hdr['len'];
$recvd_data = stream_get_contents($stream, $len);
return $recvd_data;
}
Mathieu ¶
4 months ago
When opening large sites/files you may encounter memory problems. I suggest you to use fopen() and fread() for those requests.
Be aware that fopen() in comparison with stream_get_contents() doesn't allow $resource to be null.
<?php
// $resourcemay be empty or a resource (@see stream_context_create()) in my case.
if(!isset($resource) || empty($resource)) {
if(!$handle = fopen($from, 'r', false)) {
exit;
}
}
if(is_resource($resource)) {
if(!$handle = fopen($from, 'r', false, $resource)) {
exit;
}
}
// ... Do something with $handle
?>