stream_wrapper_register
(PHP 4 >= 4.3.2, PHP 5)
stream_wrapper_register — Register a URL wrapper implemented as a PHP class
Description
bool stream_wrapper_register
( string $protocol
, string $classname
[, int $flags = 0
] )
Allows you to implement your own protocol handlers and streams for use with all the other filesystem functions (such as fopen(), fread() etc.).
Parameters
- protocol
-
The wrapper name to be registered.
- classname
-
The classname which implements the protocol.
- flags
-
Should be set to STREAM_IS_URL if protocol is a URL protocol. Default is 0, local stream.
Return Values
Returns TRUE on success or FALSE on failure.
stream_wrapper_register() will return FALSE if the protocol already has a handler.
Changelog
| Version | Description |
|---|---|
| 5.2.4 | Added the flags parameter. |
Examples
Example #1 How to register a stream wrapper
<?php
$existed = in_array("var", stream_get_wrappers());
if ($existed) {
stream_wrapper_unregister("var");
}
stream_wrapper_register("var", "VariableStream");
$myvar = "";
$fp = fopen("var://myvar", "r+");
fwrite($fp, "line1\n");
fwrite($fp, "line2\n");
fwrite($fp, "line3\n");
rewind($fp);
while (!feof($fp)) {
echo fgets($fp);
}
fclose($fp);
var_dump($myvar);
if ($existed) {
stream_wrapper_restore("var");
}
?>
The above example will output:
line1 line2 line3 string(18) "line1 line2 line3 "
See Also
- The streamWrapper prototype class
- Example class registered as stream wrapper
- stream_wrapper_unregister() - Unregister a URL wrapper
- stream_wrapper_restore() - Restores a previously unregistered built-in wrapper
- stream_get_wrappers() - Retrieve list of registered streams