PHP offers many functions for file manipulation. The **`file_exists` function** checks if a file or directory exists at the specified path.

# Syntax
The syntax for `file_exists` function is shown below:
```perl
file_exists(string $path): bool
``` 
# Parameters
The `file_exists` function takes only one parameter: 
- `path`: This is a required parameter. This is a string that specifies the path to the file or directory to check. 

> The results of this function are stored in the cache. You can use the `clearstatcache` function to clear the cache.

# Return value
The function returns a bool value, `true` if the file or directory exists at the specified path, and returns `false` if it does not. 



# Code
The following code shows how we can use the `file_exists` function:


<?php
if (file_exists("test.txt")) {
    echo "File exists.\n";
}
?>

What is file_exists in PHP?

file_exists checks if a file or directory exists at a specified path, returning true or false.