The diskfreespace() function returns the available free space in a directory and is an alias of disk_free_space().
Syntax
diskfreespace(dir_name)
Parameters
dir_name − Directory to be specified.
Return
The diskfreespace() function returns the free space in bytes.
Example
<?php echo diskfreespace("/home/"); ?>
Output
832931168256
Let us see another example.
Example
<?php $free_space = diskfreespace("/home/"); echo "Free Space: $free_space"; ?>
Output
Free Space: 832931168256