foreach loop just getting the keys

[MadnessRed]

I have a foreach loop as shown below.

 

foreach($d as $i => $a){
$d[$i] *= $percent;
}

 

whilst this code works fine when I use analyse code I get the following

The variable assigned to $a is never used

 

This is the 1 error in the script so I was wondering if there was a way that would avoid having to declare $a,

 

eg

 

foreach($d as $i => NULL){

 

 

 

[Mark Baker]

Take a look at the array_keys() function

 

foreach(array_keys($d) as $i) {
   $d[$i] *= $percent;
}

 

or consider using array_walk()

[rhodesa]

i would ignore the error...as all other options i can think of use more processing