Never saw this operator before

Question

I was reading a source from laravel project and then i found this line:

$this->crawler() ?: $this->response->getContent()

Does ?: do something special? In php?

I dont remember seeing that in any other place

score 1 · Accepted Answer · edited Jun 03 '16 at 20:33

1

Ternary operator :)

Left side determines the course of action if the function called returns anything other than FALSE or 0. If it is false or 0, the right side will be the action taken.

This can also be 'stacked' to perform the first statement in a sequence that results in a value of anything but FALSE or 0. For example:

echo 0 ?: 1 ?: 2 ?: 3; //1
echo 1 ?: 0 ?: 3 ?: 2; //1
echo 2 ?: 1 ?: 0 ?: 3; //2
echo 3 ?: 2 ?: 1 ?: 0; //3
echo 0 ?: 1 ?: 2 ?: 3; //1
echo 0 ?: 0 ?: 2 ?: 3; //2
echo 0 ?: 0 ?: 0 ?: 3; //3

edited Jun 03 '16 at 20:33

Paul Horn

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answered Jun 03 '16 at 19:03

Pedro Costa

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This isn't the ternary operator, since it doesn't have anything between `?` and `:`. – Barmar Jun 03 '16 at 19:24
I tought it was ternary at first too... – CarlosCarucce Jun 04 '16 at 17:28

Never saw this operator before

1 Answers1