The **`is_link()` function** in PHP checks whether the given filename is a #key# symbolic link: A symbolic link serves as a reference to a file or directory as either a relative or absolute path. #key#.

# Syntax

```c
is_link(string $name): bool

```

# Parameters

`name`: This specifies the path to the file we want to check. 

# Return value

`is_link()` returns `true` if the provided filename exists and is also a symbolic link. Otherwise, it returns `false`.

# Code
The following code shows how to use the `is_link()` function.

<?php
$name = "documents"; // a file path which is checked whether it is a symbolic link or not.
if(is_link(name))
{
  echo ("name is a link"); // here if the argument is a valid symbolic link
} 
else
{
  echo ("name is not a link"); // here if the argument is not a valid symbolic link
}
?>

> This function produces cache output. We have to clear the cache by using the `clearstatcache()` function.

What is the is_link() function in PHP?

In PHP, is_link() checks if a filename is a symbolic link, returning true if it is.