Detailed explanation of PHP object-oriented philosophy

This article mainly shares with you a detailed explanation of PHP's object-oriented philosophy. It mainly explains it to you in text, hoping to help you.

Before learning object-oriented, let’s review the process-oriented examples:

/*
Process-oriented

Receive the gender parameter male/female from the address bar

Simulate the behavior of welcoming guests in a shopping mall:
If the customer is a male: greet "Hello, sir"
If the customer is a female: greet "Hello, madam"
*/

$g = $_GET['gender'];if($g == '男') {    echo '先生好';
} else if ($g == '女') {    echo '女士好';
} else {    echo '妖猴!';
}echo &#39;<br >&#39;;

---

Simple object-oriented example:

/*
Unlucky Zhang San

Zhang San is an ordinary person. When others greet him in the morning, he will say "Good morning".
But one day he was hit by a car and suffered a little brain injury.
Therefore, when others greeted him in the morning,
he would sometimes say: "Good morning", but sometimes he would say: "In the evening Good" or even insult the other person.
*/


/*
Relevant elements we can see from this example:

张三
张三’s IQ
张Three hello

车
车杀人
*/

/*
Zhang San is an object
The car is also an object

张San has IQ—> Attribute [name]
Zhang San can say hello—> Function/method [verb]

Cars can hit people—> Function/method [verb]
*/

class Man {
    public $iq = 100;    public function say() {
        $arr = array('早上好','晚上好','你妹啊');        if($this->iq >= 100) {            echo $arr[0];
        } else {            $i = rand(0,2);            echo $arr[$i];
        }
    }
}class Car {
    public function hit($people) {
        $newiq = rand(50,110);        $people->iq = $newiq;
    }
}$lisi = new Man();$QQ = new Car();$lisi->say();echo &#39;<br />&#39;; 

// 撞击$QQ->hit($lisi);echo $lisi->iq,&#39;<br >&#39;;$lisi->say();echo &#39;<br />&#39;; 

$lisi->say();echo &#39;<br />&#39;; 

$lisi->say();echo &#39;<br />&#39;;

           

Before learning object-oriented, let’s review the process-oriented examples:

/*
Process-oriented

From the address bar Receive gender parameter male/female

Simulate the behavior of welcoming guests in the mall:
If the customer is a male: greet "Hello, sir"
If the customer is a female: greet "Hello, madam"
*/

$g = $_GET['gender'];if($g == '男') {    echo '先生好';
} else if ($g == '女') {    echo '女士好';
} else {    echo '妖猴!';
}echo &#39;<br >&#39;;

---

Simple object-oriented example:

/*
Unlucky Zhang San

Zhang San is an ordinary person. Others morning Say hello to him and he will say "good morning".
But one day he was hit by a car and suffered a little brain injury.
Therefore, when others greeted him in the morning,
he would sometimes say: "Good morning", but sometimes he would say: "In the evening Good" or even insult the other person.
*/


/*
Relevant elements we can see from this example:

张三
张三’s IQ
张Three hello

车
车杀人
*/

/*
Zhang San is an object
The car is also an object

张San has IQ—> Attribute [name]
Zhang San can say hello—> Function/method [verb]

Cars can hit people—> Function/method [verb]
*/

class Man {
    public $iq = 100;    public function say() {
        $arr = array('早上好','晚上好','你妹啊');        if($this->iq >= 100) {            echo $arr[0];
        } else {            $i = rand(0,2);            echo $arr[$i];
        }
    }
}class Car {
    public function hit($people) {
        $newiq = rand(50,110);        $people->iq = $newiq;
    }
}$lisi = new Man();$QQ = new Car();$lisi->say();echo &#39;<br />&#39;; 

// 撞击$QQ->hit($lisi);echo $lisi->iq,&#39;<br >&#39;;$lisi->say();echo &#39;<br />&#39;; 

$lisi->say();echo &#39;<br />&#39;; 

$lisi->say();echo &#39;<br />&#39;;

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