Hosting Account Free Space [closed]

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I have a spot on my cms dashboard where I want to echo how much free space I have left to use on my hosting account. What kind of php tags am I going to need for this? Or is this even possible?

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The function is disk_free_space, however, on shared web hostings it's often disabled for security reasons.

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I used to do this on my old hosting acc

$free = disk_free_space("/");
$total = disk_total_space("/");
$percent = ($free/$total)*100;