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what is write context error


koolaidman52

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Can anybody tell me what my problem is with this? (error edtails below)
.
.
.

  if (strtoupper(trim($which)) =  'CITY')
  { return $city;}
   
  if (strtoupper(trim($which)) = 'STATE')
  {  return $state;}
   
  if (strtoupper(trim($which)) = 'BOTH')
  {  return $citystate; }

Fatal error: Can't use function return value in write context in C:\Program Files\Apache Group\Apache2\htdocs\functions.php on line 32

Line 32 is the first if

code functioned fine without the ifs when I just

return $city;

Thanks
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