Internal reference of private method in PHP class, php class private reference_PHP tutorial

Internal references to private methods in PHP classes, private references to PHP classes

I used to be used to art and front-end development, but now I have advanced to the back-end and started to learn PHP. Sometimes, I encountered a problem with private method calling.

The code is as follows:

<span> 1</span> <?<span>php
</span><span> 2</span> <span>class</span><span> Person { 
</span><span> 3</span>     <span>public</span> <span>function</span> say(<span>$name</span>, <span>$age</span><span>) {  
</span><span> 4</span>         <span>$con</span> = <span>$this</span>->get(<span>$name</span>, <span>$age</span>); <span>//</span><span>这里的$this->是关键</span>
<span> 5</span>         <span>echo</span> "my name is :".<span>$name</span>."<br />"<span>;  
</span><span> 6</span>         <span>echo</span> "my age is :".<span>$age</span>."<br/>"<span>;
</span><span> 7</span>         <span>echo</span> "get :".<span>$con</span>."<br/>"<span>;        
</span><span> 8</span> <span>    }
</span><span> 9</span>     <span>private</span> <span>function</span> get(<span>$a</span>, <span>$b</span><span>) {
</span><span>10</span>         <span>$a</span> = <span>$a</span>.<span>$b</span><span>;
</span><span>11</span>         <span>return</span> <span>$a</span><span>;
</span><span>12</span> <span>    }
</span><span>13</span> 
<span>14</span> <span>}  
</span><span>15</span> 
<span>16</span> <span>$person</span>=<span>new</span><span> Person();  
</span><span>17</span> <span>$person</span>->say("ren", 25<span>);
</span><span>18</span> 
<span>19</span> ?>        

This code is very simple. I want to implement the call of the internal private method of the class. As shown in line 4. I was used to writing JS in the past. When calling the get() method, if I didn't add "$this" in front, the program would have problems. After adding it, you can call it.

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