There is no difference between php array brackets and

The difference between php array brackets and none: 1. Arrays without brackets are not intuitive in the code, while those with brackets are easier to understand; 2. Arrays without brackets can only be used during assignment, not Perform other operations, and those with parentheses can perform more operations.

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP is a programming language widely used for web development. It provides many powerful features to simplify the development process. Among them, PHP array is a flexible and commonly used data structure used to store and manage multiple data items. In PHP, arrays can be surrounded by parentheses or omitted. Although this difference may seem small, it has an important impact on the readability and maintainability of the code.

First look at the array without parentheses. In PHP, you can create a simple array by declaring a variable and assigning the value to the array. For example:

$fruits="apple","banana","orange";

Arrays created in this way are called "lists" or "indexed arrays", and their keys are integers, starting from 0 and increasing. In this example, the value of `$fruits[0]` is "apple", the value of `$fruits[1]` is "banana", and so on. The benefit of lists is that they take up very little memory and are very efficient to traverse.

1. Arrays without brackets have some readability problems. First, arrays without parentheses are not intuitive in code. Someone reading the code might be confused as to whether they are variables or arrays. Additionally, arrays without parentheses can only be used during assignment and not for other operations, such as appending, deleting, or accessing specific elements.

In order to enhance the readability and maintainability of the code, PHP provides array syntax using parentheses. By using parentheses we can clearly define and manipulate arrays. For example:

$fruits=["apple","banana","orange"];

2. Arrays created with parentheses are equivalent to arrays without parentheses, but they are easier to understand and can perform more operations. Using parenthesized arrays you can dynamically add, delete, find, and modify elements. Additionally, they can use strings as keys, thus creating associative arrays. The keys of an associative array can be any string, not just integer indices.

The array syntax of brackets can also use multi-dimensional arrays in arrays. For example:

$students=[
["name"=>"John","age"=>18],
["name"=>"Jane","age"=>20]
];

In this example, the value of `$students[0]["name"]` is "John" and the value of `$students[1]["age"]` is 20. This approach allows us to easily represent and manipulate deep data structures.

To summarize, although array brackets in PHP are semantically the same as arrays without brackets, the array syntax using brackets is more readable and maintainable. It not only clearly represents the concept of arrays, but also allows for more operations, thereby improving the flexibility and functionality of the code. Whether you're creating a simple list or complex linked data, bracketed array syntax makes it easier to understand and process your data. Therefore, it is recommended to use bracketed array syntax when writing PHP code to improve the readability and maintainability of the code. .

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