Example of usage of __toString() method in php

The example in this article describes the __toString() method in php. I would like to share it with you for your reference. The details are as follows:

We have said before that the methods that declare the method name starting with "--" in the class are all methods that are automatically called and executed under different circumstances at a certain time. The "__toString()" method is also automatically called. It is automatically called when directly outputting an object reference.

<?php
class TestClass{
  public $foo;
  public function __construct($foo) {
    $this->foo = $foo;
  }
  public function __toString() {
    return $this->foo;
  }
}
$class = new TestClass("Hello");
echo $class;
?>

At this time, "Hello" will be automatically output.

I hope this article will be helpful to everyone in PHP programming.

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