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Reverse Switch

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        Handy technique if you want to use more complex comparisons other than == in a switch statement.  Much tidier than the elseif equivilant.  
switch(true) {

   case $x == "hello":
      // $x is hello

   case is_numeric($x):
      // $x is a number

   case $x < 10:
      // $x is less than 10