Result Size: 625 x 571
x
 
<!DOCTYPE html>
<html>
<body>
<?php
$a=array("Volvo","BMW");
if (array_key_exists(0,$a))
  {
  echo "Key exists!";
  }
else
  {
  echo "Key does not exist!";
  }
?>
</body>
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</html>
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