Your error:
Fatal error: Uncaught ReflectionException: Function Test::test_function() does not exist in test.php.
Doesn't refer to the function name quite as you expect it to.
ReflectionClass
docs says this:
The ReflectionClass class reports information about a class.
ref: https://secure.php.net/manual/en/class.reflectionclass.php
You want to use a combination of methods available in that class to get information about the passed method like this:
public function parameters($class, $fnc)
{
$f = new ReflectionClass($class);
if ($f->hasMethod($fnc)) {
return 'howdy folks';
} else {
return 'not so howdy folks';
}
}
You first pass the class before checking if the function exists. You can then use the built-in function hasMethod to check if the function exists. You then use the parameters function like this:
public function testFunction()
{
return $this->helper->parameters(__CLASS__, __FUNCTION__);
}
All together the code looks like this:
<?php
ini_set('display_startup_errors', 1);
ini_set('display_errors', 1);
error_reporting(-1);
class paramsHelper
{
public function parameters($class, $fnc)
{
$f = new ReflectionClass($class);
$f->getMethod($fnc);
if ($f->hasMethod($fnc)) {
return 'howdy folks';
} else {
return 'not so howdy folks';
}
return $f;
}
}
class Test
{
protected $helper;
public function __construct($helper)
{
$this->helper = $helper;
}
public function testFunction()
{
return $this->helper->parameters(__CLASS__, __FUNCTION__);
}
}
$test = new Test(new paramsHelper());
echo '<pre>';
print_r($test->testFunction());
echo '</pre>';
One of your other problems is that __METHOD__
actually returns a string like this: Test::testFunction
not testFunction
- hence my use of __FUNCTION__
instead.
Edit:
To get the parameters of the passed method, change your parameters method to this:
class paramsHelper
{
public function getMethodParameters($class, $fnc)
{
$f = new ReflectionMethod($class, $fnc);
echo '<pre>';
print_r($f->getParameters());
echo '</pre>';
}
}
This uses ReflectionMethod
in place of ReflectionClass
- this is more inline with your intended use.
ref: https://secure.php.net/manual/en/class.reflectionmethod.php
use:
class paramsHelper
{
public function getMethodParameters($class, $fnc)
{
$f = new ReflectionMethod($class, $fnc);
echo '<pre>';
print_r($f->getParameters());
echo '</pre>';
}
}
class Test
{
protected $helper;
public function __construct($helper)
{
$this->helper = $helper;
}
public function testFunction($a = '', $b = 1, $c = 3)
{
return $this->helper->parameters(__CLASS__, __FUNCTION__);
}
}
$test = new Test(new paramsHelper());
echo '<pre>';
print_r($test->testFunction());
echo '</pre>';