在PHP中，如何从函数中回显数组的第二个键？

Question

I want to output an array key which get returned from a function. Currently its like this:

$x = explode('/', 'my/path/home');
echo $x[1];

but how can i output with just one line without the variable assignment?

I'm trying this, but it doesnt work:

echo explode('/', 'my/path/home')[1];

Answer 1

If you must do this in one line, IMO it is preferable to use list:

list(, $x) = explode('/', $path);

This is arguably better than the long-winded

$x = implode('', array_slice(explode('/', $path), 1, 1));

in which it's easy to forget what you were supposed to be doing in the first place.

If you are not sure if there will be a second element, you can guard against problems with

list(, $x) = array_pad(explode('/', $path), 2, null);

However, I don't really recommend any of the above for real code. Use the two-liner if you have to; it will still be easier to read than any of these solutions.