CakeFest 2017 NYC, the Official CakePHP Conference


(PHP 4, PHP 5, PHP 7)

linkinfoGets information about a link


int linkinfo ( string $path )

Gets information about a link.

This function is used to verify if a link (pointed to by path) really exists (using the same method as the S_ISLNK macro defined in stat.h).



Path to the link.

Return Values

linkinfo() returns the st_dev field of the Unix C stat structure returned by the lstat system call. Returns 0 or FALSE in case of error.


Version Description
5.3.0 This function is now available on Windows platforms (Vista, Server 2008 or greater).


Example #1 linkinfo() example


echo linkinfo('/vmlinuz'); // 835


See Also

add a note add a note

User Contributed Notes 1 note

rjb at robertjbrown dot com
5 years ago
I expected this function to return FALSE or 0 if a symbolic link did not exist (per the documentation above), but that's not what happened. Reading the man page for the Linux kerne's stat call here: it says this:

RETURN VALUE - On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

... which is what is happening in my case. I am doing a linkinfo('/path/to/file'); on a missing symlink, and I get back a value of -1. As we know, a value of -1 is not going to evaluate to a FALSE or 0.

My point - be careful with return values for missing symlinks.
To Top