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PHP PHP Functions Introducing Functions PHP Function Default Arguments

Posted by George Akinian
George Akinian
17,615 Points

2:21 find discrepancy, great('Mike'); will not echo Hi,Mike. It will echo Hello,Mike. Confusing. Look at code provided

<?php

function greet($name = 'friend', 
               $time_of_day = Null){
  if($time_of_day){
    echo "Hi, $name, good $time_of_day";
  } else { 
     echo "Hello, $name";
   }
 }

greet("Mike", "morning");

?>

2 Answers

thomascawthorn
thomascawthorn
22,986 Points
thomascawthorn
thomascawthorn
22,986 Points

Yay! Problem solved. It's a little one for Hampton Paulk :-)

Marcus Parsons
Marcus Parsons
15,719 Points
Marcus Parsons
Marcus Parsons
15,719 Points

Hey Paul,

The if-statement there checks to see if $time_of_day is not a falsey value such as null. $time_of_day is set to null by default, so when you don't set $time_of_day to an explicit value, it will take the initial value of null and the else statement will execute.

George Akinian
George Akinian
17,615 Points

What you said is correct. And thus, in the video the msg printed is Hi, Mike, but if you look closely there is no "Hi" in the else statement, yet video clearly states "Hi" instead of "Hello", it's a minor error but had me wondering for a minute.

Cheers!

Marcus Parsons
Marcus Parsons
15,719 Points

Ah I see what you're saying after watching the video! Apologies! You should tag the instructor here so they can see this.