<?php

// Variable keys.
foo( $arr[ $test ] ); // Bad.
bar( $arr[ $test ] ); // Bad.
foo( $arr[ $test ] ); // Bad.
bar( $arr[ $test ] ); // Good.

// The opposite with strings.
foo( $arr['test'] ); // Good.
bar( $arr['test'] ); // Bad.
foo( $arr['test'] ); // Bad.
bar( $arr['test'] ); // Bad.

// Nested ones.
foo( $arr[ $test[ $taz ] ] ); // Bad.
bar( $arr[ $test['taz'] ] ); // Bad.
foo( $arr[ $test['taz'] ] ); // Bad.
bar( $arr[ $test['taz'] ] ); // Good.

// Mixed key.
foo( $arr[ 'string' . $var ] ); // Good, should have spaces.
bar( $arr[ 'string'.$var ] ); // Bad.

// Non-string/int.
$arr[ FooClass::FOO_KEY ]; // Bad.

$arr[0]; // Good.
$arr[0]; // Bad.
$arr[-1]; // Good.
$arr[-1]; // Bad.

// Space size check.
bar( $arr['test'] ); // Bad.
bar( $arr[ $test ] ); // Bad x 2.
$arr[ FooClass::FOO_KEY ]; // Bad x 2.

$a = $arr[ /*comment*/ 'key' ]; // Bad x 2.
$a = $arr[ /*comment*/ 'key' ]; // Bad x 2.