How Does PHP's Conditional Operator (?:) Work?

The Conditional Operators of PHP: "?" and ":**"

In PHP, the "?" and ":" operators, collectively known as the conditional operator, allow you to evaluate a condition and conditionally assign a value to a variable.

Syntax:

$x ? $y : $z

Meaning:

This expression evaluates to $y if $x is true; otherwise, it evaluates to $z.

Example:

($request_type == 'SSL') ? HTTPS_SERVER : HTTP_SERVER

This expression returns the value of HTTPS_SERVER if $request_type is equal to 'SSL', otherwise it returns the value of HTTP_SERVER.

Short Form:

For convenience, PHP provides a short form of the conditional operator:

$x ?: $z

This expression is equivalent to:

$x ? $x : $z

It evaluates to $x if $x is true, otherwise it evaluates to $z.

Note:

It's important to note that the conditional operator is not specifically called "the ternary operator." While it is a ternary operator due to its three operands, many languages have multiple ternary operators.

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