is_finite
  (PHP 4 >= 4.2.0, PHP 5)
is_finite — Finds whether a value is a legal finite number
  
 
  Description
   
    bool is_finite
     ( float $val
    )
  
  
 
  Parameters
  
   
    - 
     val
     
- 
      
       The value to check
       
 
 
  Return Values
  
   TRUE if val
 is a legal finite
   number within the allowed range for a PHP float on this platform,
   else FALSE.