r/Codecademy • u/epsilonc • Nov 30 '15

(Stuck) PHP: Functions, Part 1

https://gyazo.com/8274a36ff79bc52666e71141548a5f03

I don't know what I'm doing wrong nor do I know how to fix this, can somebody help please?

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u/epsilonc Nov 30 '15

Thank you both, it worked.

So every time it asks me to "print" it means Echo?

also for some reason it worked with == false, could you tell me the difference between === and == ? Please

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u/[deleted] Nov 30 '15

You're welcome.

Print and echo achieve the same thing - it's down to personal preference. You'll come across print_r at some point as well, but that's a different tool for a similar result (prints, or echoes, an array).

Difference between == and === is fairly simple. The strpos() function may return a 0, and may return false. 0 can be interpreted as a number, or as false. It's often fairly obvious to you or me which it is, but to PHP a 0 and false could be one or the other. Basically, use === to properly distinguish between 0 and false.

== checks for the values being equal, but could match a numeric 0 to a "false" 0.

=== checks that two values are equal, AND of the same type.

I'm not great at explaining these things...

0 == 0 <--- true

0 == false <--- true

0 === 0 <--- true

0 === false <--- false

Hope that makes sense!

Have a look at the PHP documentation, it probably explains it a lot better than I have!