In PHP, we can use the **`disk_total_space` function** to get the total space available. 
> This function will not work on remote files.

#   
## Syntax
```php
disk_total_space(string $directory): float|false
``` 
## Parameters
The function needs a `directory` or a `partition` as a mandatory parameter.

## Return value
The function will return a floating number that represents the total space of the specified directory. Otherwise, it will return `false`.
## Code
In this example, we will return the size of root directory.

<?php
$ds = disk_total_space("/home");
echo $ds;
?>

What is the disk_total_space function in PHP?

Retrieve total disk space in bytes using PHP's disk_total_space function, which requires a directory parameter.