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1. Using return, the output will be empty; but in the second example, if return is changed to echo, the result will be 1000; In the three examples, return
is also used, but the result is 1000. The specific reason is: echo is the output value; return is the return value but not output. If you want to have output, Use echo output again.
<? class Human{ private $money = 1000; public function showMoney(){ return $this->money; }} $money = new Human(); $money->showMoney(); ?>
二、
<? class Human{ private $money = 1000; public function showMoney(){ echo $this->money; }} $money = new Human(); $money->showMoney(); ?>
3.
<? class Human{ private $money = 1000; public function showMoney(){ return $this->money; }} $money = new Human(); echo $money->showMoney(); ?>
The difference between echo and return:
——>echo is outputStringTo the browser, return terminates the execution of the following code and returns a value.
PHP=>PHP uses return, PHP=>browser and javascriptuse echo
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