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Reload this Page making variable that is numeric negative

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Old 08-28-2007, 08:21 PM   PM User | #1
mhunt
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making variable that is numeric negative
i have a function that gets passed an id
what i want to do is to take the length of that id and then make that length into a negative number. Is there anyway i can do this?
PHP Code:
  $idlen = strlen($id);
  $new = substr($prefix_new, -$idlen); 
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Old 08-28-2007, 08:26 PM   PM User | #2
Mwnciau
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-$idlen will turn a positive number into a negative number, eg. 10 becomes -10
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