How to check if a class method exists in php

The way PHP checks whether a class method exists is to use the method_exists method to check, such as [(method_exists($directory,'read'));].

The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.

method_exists checks whether the method of the class exists. If the method pointed to by method_name is defined in the object class pointed to by object, then true is returned, otherwise false is returned.

Code example:

<?php
$directory = new Directory(&#39;.&#39;);
var_dump(method_exists($directory,&#39;read&#39;));
?>

The above routine will output:

bool(true)

Example 2

<?php
var_dump(method_exists(&#39;Directory&#39;,&#39;read&#39;));
?>

The above routine will output:

bool(true)

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