empty a variable variable

[muppet77]

how do you unset or clear or empty  a variable variable please?

 

i have seen :

unset($variable)

but can't get this to work on variable variables. The one i am using is called

${"hcorner".$h}

Any ideas please? Thank you.

[scootstah]

Works for me.

unset(${"hcorner".$h});

[requinix]

Don't use variable variables! An array is a perfectly adequate way of dealing with multiple values.

[muppet77]

Thanks. Maybe it's another part of code that is faulty as I have tried unset.

 

(What is the advantage of not using variable variables?)

[muppet77]

Scootstah, in my example, doesn't unset only unset whatever $h is at that point in the code?

If so I need to unset all keys used in the variable.

Thank you.

[muppet77]

SOLVED - i used a while loop to increase $h and reset every variable variable individually.

maybe not the best way but it works.

 

thanks all

[mac_gyver]

(What is the advantage of not using variable variables?)

 

 

variable variable references take three times longer then an equivalent array reference.

 

if you have a set of related data, that's what arrays are for. you can then use php's array functions to operate on the data, generally without any need to explicitly loop over each value and without writing out line after line of code referencing each discrete variable.

[scootstah]

variable variable references take three times longer then an equivalent array reference.

That, and it's "magic". It's difficult to inspect them or figure out what is going on at first glance.