访问类的PHP函数[重复]

Question

This question already has an answer here:

• Can I use a variable to call a method? 3 answers

How to access the PHP function of a class where the function is stored in variable?

For example:

$functionname = "say_hello";
$obj = new Class();
$obj -> $functionname();

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Answer 1

if function name is stored in a variable check if it is exists and is callable like

   if ( method_exists( $product, $method ) ) {
print $product->$method(); // invoke the method
}

then check if it is callable

if ( is_callable( array( $product, $method) ) ) {
print $product->$method(); // invoke the method
}