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William Twiner
2,605 PointsCouple more questions
- what is the difference between:
A. $name = "Mike"; B. $name = 'Mike';
- In this video I noticed that we had a semi-colon at the end of the function, but I did not see one at the end of the function on the previous video. Why is this?
Example: function answer() { return 42; }
Now, in this example, we have the below function and it will not work unless there is a ";". I am not sure why.
<?php
$name = 'Mike';
$greet = function() use ($name){ echo 'Hello there'; };
$greet();
?>
5 Answers
Ryan Field
Courses Plus Student 21,242 PointsHi, William. The difference (in PHP, at least) between double and single quotes is that double quotes will do interpolation, while single quotes won't. What that means is this:
<?php
$name = 'Mike';
echo 'Hello, $name!'; //<-- this will print out as: Hello, $name!
echo "Hello, $name!"; //<-- this will print out as: Hello, Mike!
?>
As for your second question, if you have a single line of code inside a PHP block or a function, the comma is optional. Once you put more than one line of code, though, it will be necessary or you will get errors.
William Twiner
2,605 PointsThank you!
In the video the code spans for 4 lines and yet there is no semi-colon for both of the functions presented.
(When I copied and pasted it came out on one line)
He had it like this:
function answer() { return 42; }
With no semi-colon.
William Twiner
2,605 Pointshmmm, it seems it keeps putting it on one line. :(
Ryan Field
Courses Plus Student 21,242 PointsNo, worries! I assume that it looks something like this:
<?php
function answer() {
return 42
}
?>
In which case, no semicolon is necessary because the line inside the function is a single line. If the function was more complicated (as most are), then you'd definitely need it. I always use semicolons because it makes my code much more readable, and honestly, leaving off an occasional semicolon here and there doesn't save that much time.
William Twiner
2,605 Pointsfunction answer() {
return 42;
}
William Twiner
2,605 Pointshow do you post code?
Ryan Field
Courses Plus Student 21,242 PointsLike this:
(Always have one single line blank between your comment body and the three backticks.)
```php <-- three backticks (usually under the ESC key) and your code type
... your code here
``` <-- three backticks to close
(Another blank line if you have more text to type out below)
Et voila!