What is the difference between dot and comma in php

The dot in PHP is used for object and array access, and commas are used to separate variable lists, array values, and function parameters.

The difference between dot (.) and comma (,) in PHP

In PHP, dot (.) and comma (,) are two different operators with different purposes.

Dot (.)

• Object access operator: Used to access properties or methods in an object. For example:

$user = new User();
$name = $user->name;

• Array key access operator: is used to access values ​​in an array. For example:

$array = ['name' => 'John', 'age' => 30];
$name = $array['name'];

Comma (,)

• Variable list separator: is used to separate variable lists, such as functions parameters or array elements. For example:

function sum(int $a, int $b) {
    return $a + $b;
}

• Array value separator: is used to separate values ​​in an array. For example:

$array = [1, 2, 3];

• Function call delimiter: is used to separate parameters of function calls. For example:

echo print_r($array, true);

Summary

The period (.) in PHP is mainly used for object and array access, while the comma (,) is mainly used for separation Variable lists, array values, and function parameters.

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