(PECL eio >= 0.0.1dev)
eio_readlink — Read value of a symbolic link
pathSource symbolic link path
priThe request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or null.
If null passed, pri internally is set to
EIO_PRI_DEFAULT.
callback
callback function is called when the request is done.
It should match the following prototype:
void callback(mixed $data, int $result[, resource $req]);datais custom data passed to the request.
resultrequest-specific result value; basically, the value returned by corresponding system call.
reqis optional request resource which can be used with functions like eio_get_last_error()
data
Arbitrary variable passed to callback.
eio_readlink() returns request resource on success, or false on failure.
Example #1 eio_readlink() example
<?php$filename = dirname(__FILE__)."/symlink.dat";touch($filename);$link = dirname(__FILE__)."/symlink.link";$hardlink = dirname(__FILE__)."/hardlink.link";function my_hardlink_cb($data, $result) { global $link, $filename; var_dump(file_exists($data) && !is_link($data)); @unlink($data); eio_symlink($filename, $link, EIO_PRI_DEFAULT, "my_symlink_cb", $link);}function my_symlink_cb($data, $result) { global $link, $filename; var_dump(file_exists($data) && is_link($data)); if (!eio_readlink($data, EIO_PRI_DEFAULT, "my_readlink_cb", NULL)) { @unlink($link); @unlink($filename); }}function my_readlink_cb($data, $result) { global $filename, $link; var_dump($result); @unlink($link); @unlink($filename);}eio_link($filename, $hardlink, EIO_PRI_DEFAULT, "my_hardlink_cb", $hardlink);eio_event_loop();?>The above example will output something similar to:
bool(true) bool(true) string(16) "/tmp/symlink.dat"