PHP Callback callback type js callback call back to asynccallbac

When I looked at autoload of composer, I found that he used spl_autoload_register to register a class class. .

I clearly remember to pass in a autoload function queue to be registered. I checked the documentation and found out that I had a misunderstanding of the Callback callback type

See the example of the Callback callback type in the documentation:

<code><span>// Type 1: Simple callback</span>
call_user_func(<span>'my_callback_function'</span>); 

<span>// Type 2: Static class method call</span>
call_user_func(<span>array</span>(<span>'MyClass'</span>, <span>'myCallbackMethod'</span>)); 

<span>// Type 3: Object method call</span><span>$obj</span> = <span>new</span> MyClass();
call_user_func(<span>array</span>(<span>$obj</span>, <span>'myCallbackMethod'</span>));

<span>// Type 4: Static class method call (As of PHP 5.2.3)</span>
call_user_func(<span>'MyClass::myCallbackMethod'</span>);

<span>// Type 5: Relative static class method call (As of PHP 5.3.0)</span><span><span>class</span><span>A</span> {</span><span>public</span><span>static</span><span><span>function</span><span>who</span><span>()</span> {</span><span>echo</span><span>"A\n"</span>;
    }
}

<span><span>class</span><span>B</span><span>extends</span><span>A</span> {</span><span>public</span><span>static</span><span><span>function</span><span>who</span><span>()</span> {</span><span>echo</span><span>"B\n"</span>;
    }
}

call_user_func(<span>array</span>(<span>'B'</span>, <span>'parent::who'</span>)); <span>// A</span></code>

There are 5 callback types here, not just function

Learn and encourage each other. .

').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });

The above introduces the PHP Callback callback types, including the content of call and back. I hope it will be helpful to friends who are interested in PHP tutorials.