How to call methods of other classes in php?

How php calls other classes: First create a file named [tool.php] and declare a class in the file; then create another file named [main.php], And just call the above class in the file.

php calls methods of other classes:

The calling method in Java is import, but not in PHP Import this function. Generally, require() is used to call other classes in PHP. The specific method of calling other classes in PHP is as follows:

1. First, there should be a file named tool.php file, declare a class in the file.

#2. Then you need to have another file named main.php, and call the above class in the file. Methods as below.

Extended information:

A class is a collection of variables and functions that act on these variables. Use the following syntax to define a class:

<?php
class Cart { var $items; // 购物车中的物品
// 将 $num 个 $artnr 物品加入购物车
function add_item($artnr, $num) {
$this->items[$artnr] += $num;
} // 将 $num 个 $artnr 物品从购物车中取出
function remove_item($artnr, $num) {
if ($this->items[$artnr] > $num) {
$this->items[$artnr] -= $num; return true;
} elseif
($this->items[$artnr] == $num) {
unset($this->items[$artnr]); return true;
} else {
return false; }
}
} ?>

The above example defines a Cart class, which consists of an array of items in the shopping cart and two functions for adding and removing items from the shopping cart. composition.

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