(PHP 5)
stream_get_wrappers — Retrieve list of registered streams
Retrieve list of registered streams available on the running system.
Returns an indexed array containing the name of all stream wrappers available on the running system.
Example #1 stream_get_wrappers() example 以上例程的输出类似于：
<?php
print_r(stream_get_wrappers());
?>
Array
(
[0] => php
[1] => file
[2] => http
[3] => ftp
[4] => compress.bzip2
[5] => compress.zlib
)
Example #2 Checking for the existence of a stream wrapper
<?php
// check for the existence of the bzip2 stream wrapper
if (in_array('compress.bzip2', stream_get_wrappers())) {
echo 'compress.bzip2:// support enabled.';
} else {
echo 'compress.bzip2:// support not enabled.';
}
?>