Question:Choose the appropriate function declaration for the user-defined function is_leap(). Assume that, if not otherwise defined, the is_leap function uses the year 2000 as a default value:
<?php
/* Function declaration here */
{
  $is_leap = (!($year %4) && (($year % 100) ||
  !($year % 400)));
  return $is_leap;
}
var_dump(is_leap(1987)); /* Displays false */
var_dump(is_leap()); /* Displays true */
?>
 

A function is_leap($year = 2000) 
B is_leap($year default 2000) 
C function is_leap($year default 2000) 
D function is_leap($year) 
E function is_leap(2000 = $year) 

+ Answer
A 

+ Explanation
Of the five options, only two are valid PHP function declarations (A and D). Of these two declarations, only one will provide a default parameter if none is passed—Answer A.

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Mohammad Towhidul Islam

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