Created
          June 25, 2014 12:19 
        
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    Type conversion in php
  
        
  
    
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  | <?php | |
| $a = ""; | |
| var_dump(($a == null)); //outputs false | |
| var_dump(($a === null)); //outputs true | |
| var_dump(is_null($a)); //outputs true | |
| $b; | |
| var_dump(($b == null)); //outputs true | |
| var_dump(($b === null)); //outputs true | |
| var_dump(is_null($b)); //outputs true | |
| ?> | 
  
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