正确访问数组[重复]

Question

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• PHP syntax for dereferencing function result 22 answers

I've seen people write code like this:

$image_url =  wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), array(300, 300), false, ''); 
$image_url = $image_url[0];

which seems a little ridiculous because you could just attach the [0] to the end of the first term. So I never did it in my local machine, but now when deploying to remote machines (with possibly different versions of php, I always get bugs about unexpected '['. Does php not accept accessing arrays in-place, or was there some change in some version?

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Answer 1

This is allowed since PHP 5.4:

Function array dereferencing has been added, e.g. foo()[0].