=== is not ternary operator

I just had a look at the beginning of that video and it contradicts what I've been taught previously. I agree with you that an operator that takes a value either side of it is a binary operator. Like addition, +, this is a binary operator x + y, yet in the video it is called a unary operator. The thing that is being 'counted' is the number of operands so unary is something like NOT, or increment (++), decrement (--). These can be applied to a single operand - hence they are unary operators.

Binary operators require two operands, addition (as above), subtraction etc; they need two numbers (operands) to work on.

I'll be honest, I Googled a ternary operator as I couldn't think of one that takes three operands. There's a conditional operator, I found. It needs a condition and two outputs based on the true/false outcome of the condition - as such it is a ternary operator.

I agree with you that the beginning of this video, on the face of it, seems confusing/confused and may need a little extra clarity.

Steve.

I've always heard the ternary operator refer to ?: as a shorthand for if/else.

http://php.net/manual/en/language.operators.comparison.php

<?php
// Example usage for: Ternary Operator
$action = (empty($_POST['action'])) ? 'default' : $_POST['action'];

// The above is identical to this if/else statement
if (empty($_POST['action'])) {
    $action = 'default';
} else {
    $action = $_POST['action'];
}
?>

Some further posts on the same point: https://teamtreehouse.com/community/operators-4

https://teamtreehouse.com/community/php-basics-operators

I've emailed Support to flag it too.

Steve.

There's the correct definition of a ternary operator at around 7m28s in this video. Perhaps Craig Dennis can have the PHP course looked at to correct the incorrect definitions regarding unary, binary and ternary operators.