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 — Lit tout un flux dans une chaîne
Description
string stream_get_contents
( resource
$handle
[, int $maxlength = -1
[, int $offset = -1
]] )
stream_get_contents() est identique à
file_get_contents(), sauf qu'elle opère sur
un pointeur de fichier déjà ouvert et retourne le contenu restant, allant jusqu'à
maxlength octets, dans une chaîne et commençant à la position
offset.
Liste de paramètres
-
handle(resource) -
Une ressource de flux (e.g. retournée par la fonction fopen())
-
maxlength(entier) -
Le nombre maximal d'octets à lire. Par défaut, -1 (lit tout le contenu restant du buffer).
-
offset(entier) -
Se déplace à la position spécifiée avant la lecture. Si le nombre passé est négatif, aucun déplacement ne sera effectué et la lecture commencera de la position courante.
Valeurs de retour
Retourne une chaîne de caractères ou FALSE si une erreur survient.
Historique
| Version | Description |
|---|---|
| 5.1.0 |
Le paramètre offset a été ajouté.
|
Exemples
Exemple #1 Exemple avec stream_get_contents()
<?php
if ($stream = fopen('http://www.example.com', 'r')) {
// affiche toute la page, en commençant à la position 10
echo stream_get_contents($stream, -1, 10);
fclose($stream);
}
if ($stream = fopen('http://www.exemple.net', 'r')) {
// Affichage des 5 premiers octets
echo stream_get_contents($stream, 5);
fclose($stream);
}
?>
Notes
Note: Cette fonction gère les chaînes binaires.
Voir aussi
- fgets() - Récupère la ligne courante sur laquelle se trouve le pointeur du fichier
- fread() - Lecture du fichier en mode binaire
- fpassthru() - Affiche le reste du fichier
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
?>