Using PHP's filter_var to validate email or number

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This code generates SQL depending on semantic type of variable from user input.


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  1. //selecting user based on his personal ID number
  2. if(filter_var($var, FILTER_VALIDATE_INT)) $sql = "select * from user where JMBG='$var'";
  3. //selecting user based on his email
  4. else if(filter_var($var, FILTER_VALIDATE_EMAIL)) $sql = "select * from user where email='$var'";
  5. //selecting user based on his username
  6. else $sql = "select * from user where username='$var'";

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