Why Is My PHP 5.3 Code Failing With Array Dereferencing Syntax in PHP 5.4?

PHP 5.3 vs. 5.4 Array Access Disparity: Parsing Error Explained

In the context of Zend Framework 2, a developer encounters a parsing error when attempting to access a nested array element using syntax specific to PHP 5.4. This raises questions regarding potential differences in array accessing between PHP 5.3 and 5.4.

The answer lies in the introduction of array dereferencing in PHP 5.4. The code

$dbSettings = $sm->get('Config')[ 'doctrine' ][ 'connection' ][ 'orm_default' ][ 'params' ];

utilizes array dereferencing, which is unavailable in PHP 5.3. Consequently, for PHP 5.3, the following approach is required:

$dbSettings = $sm->get('Config');
$params     = $dbSettings[ 'doctrine' ][ 'connection' ][ 'orm_default' ][ 'params' ];

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