The meaning of the connection symbols greater than sign and equal sign greater than sign in PHP-PHP Problem-php.cn

The meaning of the connection symbols greater than sign and equal sign greater than sign in PHP

autoload

Release： 2023-03-09 10:44:01

forward

2692 people have browsed it

The meaning of the connection symbols greater than sign and equal sign greater than sign in PHP

## While studying

PHP, I encountered -> and => these two symbols.

When I first encountered these two symbols, I didn’t know what they represented. I only discovered the secrets of these two symbols after going through Baidu.

Let’s take a look at the secret of -> in PHP, as shown below.

speed+=10;
    }
    
}
$car = new Car();
$car->speedUp();
echo $car->speed;
?>

Copy after login

In this, we can see that a speedUp method is defined in the class. In this method, we can see
$this->speed =10, this line of code. ->What does it represent?

After going through Baidu, I think it represents the meaning of the word "的" in Chinese characters. For example, this line of code translates to the speed of $this equal to speed plus 10. Of course this only represents my own point of view, please let me know if I am wrong.

The next step is =>. Simply put, it is the => symbol to separate keys and values. The left side represents the key and the right side represents the value. Let’s look at some code.

"苹果",'banana'=>"香蕉",'pineapple'=>"菠萝");
$arr0=$arr["apple"];
if( isset($arr0) ) 
  {print_r($arr0);
}
?>

Copy after login

In this code, first declare an arr array, and then declare a key where arr0 is equal to Apple. Then use IF to determine whether it exists. If it exists, output the value on the right side of the key in the array. .

To put it simply, it means giving someone a nickname, using a nickname to represent a certain person, and by mentioning his nickname, you can know who he is.

Recommended: 《2021 PHP interview questions summary (collection)》《php video tutorial》

The above is the detailed content of The meaning of the connection symbols greater than sign and equal sign greater than sign in PHP. For more information, please follow other related articles on the PHP Chinese website!