What are the implications of using shorthand syntax, like [] for array initialization, in older versions of PHP like 5.3?

Using shorthand syntax for array initialization like [] in older versions of PHP like 5.3 can lead to compatibility issues with code running on newer versions of PHP. To solve this issue, you should use the array() construct for array initialization instead of shorthand syntax.

// Instead of using shorthand syntax like [] for array initialization
$myArray = [];

// Use the array() construct for array initialization
$myArray = array();