Laravel [] indicates an array. how can this be done?

No php syntax. no php syntax.

Reply content:

Php syntax does not exist.

New features after PHP5.4

The manual is the best teacher!

$ Arr = [];

You can define an array. The syntax is correct.

The features of various PHP5 versions are all syntaxes supported several years ago, but they are rarely used by everyone.

Before PHP5.2: autoload, PDO and MySQLi, type constraints
PHP5.2: JSON support
PHP5.3: deprecated functions, anonymous functions, new magic methods, namespaces, static binding later, Heredoc and Nowdoc, const, ternary operators, Phar
PHP5.4: Short Open Tag, abbreviated array format, Traits, built-in Web server, detailed modification
PHP5.5: yield, list () for foreach, details modification
PHP5.6: constant enhancement, variable function parameters, and namespace enhancement