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Does PHP determine whether the method exists?
In PHP, you can use the "method_exists()" function to determine whether a method exists. This function is used to check whether a class method exists. Its syntax is "method_exists($object,$name)", The parameter $object represents the instance object, and the parameter $name represents the checking method.
Syntax and description
method_exists ( mixed $object , string $method_name ) : bool
Check whether the method of the class exists in the specified object.
Parameters
object
Object example or class name.
method_name
Method name.
Return value
If the method pointed by method_name has been defined in the object class pointed by object, then return TRUE, otherwise return FALSE.
Example
<?php $directory = new Directory('.'); var_dump(method_exists($directory,'read')); ?>
The above routine will output:
bool(true)
Recommended tutorial: "PHP Tutorial》
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