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PHP OOP 如何实现这样写法？(new MySQL())->field()->where()->select()

在很多MVC框架，比如ThinkPHP，Laravel 中看到这样的写法。
但如何写类才可以实现这样的功能？


 $s = (new MySql())
    ->field('*')
    ->table('Test')
    ->where(array('id' => 1))
    ->select();
var_dump($s);


 //报错 Fatal error: Call to undefined method MySql::field() in 
class MySql
{

    public function select()
    {

    }
}

oop php

10 years, 3 months ago

JrSeven

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JrSeven 10 years, 3 months ago

Answer 1

0

如果你看过jQuery的源码,就知道了,return this就能chain起来,同理在php中,你需要return $this;

answered 10 years, 3 months ago

young89

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young89 answered 10 years, 3 months ago

Answer 2

0

链式操作，现在是可以的，我的版本是5.2.17

answered 10 years, 3 months ago

ks135

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ks135 answered 10 years, 3 months ago

Answer 3

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 class Test{

    public function aaa(){
        echo "aaa";
        return $this;
    }

    public function bbb(){
        echo "bbb";
        return $this;
    }

    public function ccc(){
        echo "ccc";
        return $this;
    }
}

$test = new Test();

$test->aaa()->bbb()->ccc();

answered 10 years, 3 months ago

l华呖呖哩哩

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l华呖呖哩哩 answered 10 years, 3 months ago

PHP OOP 如何实现这样写法？(new MySQL())->field()->where()->select()

JrSeven

Answers

young89

ks135

l华呖呖哩哩

Your Answer

PHP OOP 如何实现这样写法？(new MySQL())-&gt;field()-&gt;where()-&gt;select()

JrSeven

Answers

young89

ks135

l华呖呖哩哩

Your Answer

PHP OOP 如何实现这样写法？(new MySQL())->field()->where()->select()