<h2>Overview</h2>

The **`realpath`** function in PHP is used to find the absolute path of the specified file. An **absolute path** is one that contains the path from the root to the element. The general syntax for the `realpath` function is as follows:

```PHP
realpath(string $path): string|false
```

<h2>Parameters</h2>

The `realpath` function has one mandatory parameter. This is the `path`, which is the file we wish to check the path for. 

<h2>Return value</h2>

The `realpath` function returns the absolute path for a file. If it fails to retrieve the path, it returns FALSE.

<h2>Example</h2>

The following example will help you understand the `realpath` function. As shown below, the `realpath` function prints the absolute path for the file `main.txt`.


What is the realpath() function in PHP?

Finds the absolute path of a specified file, returning the path or FALSE on failure.