(PHP 4, PHP 5, PHP 7)
linkinfo — Gets information about a link
linkinfo ( string $path ) : int
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
Path to the link.
linkinfo() returns the st_dev field of the Unix C stat structure returned by the lstat system call. Returns a non-negative integer on success, -1 in case the link was not found, or false if an open.base_dir violation occurs.
Example #1 linkinfo() example
<?php
echo linkinfo('/vmlinuz'); // 835
?>
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https://www.php.net/manual/en/function.linkinfo.php