php get method arguments default values

Question

I want to get list of methods inside a class as well as their arguments and default values. how can I do that? below is the code that I used:

$class = new ReflectionClass($className);
$methods = [];
foreach($class->getMethods() as $method){
   if($method->class == $className && $method->name != '__construct' ){
       $obj = [];
       $obj['controller'] = $className;
       $obj['action'] = $method->name;
       $obj['params'] = array_map(function($value){return $value->name;}, $method->getParameters());
       $methods[] = $obj;
   }
}

The sample result of above code is like:

 Array(
    [0] => Array
    (
        [controller] => Controller,
        [action] => function,
        [params] => Array
        (
            [0] => offset,
            [1] => limit
        )
    )
 )

How can I get function arguments default values?

your title should be more specific and well written. because i mistook it as an another post when i saw the title — alamin
– alamin, Commented Sep 14, 2015 at 13:10
You get a list of ReflectionParameter objects by using getParameters(). You can get the defaults from those objects using class' getDefaultValue method. — Jonnix
– Jonnix, Commented Sep 14, 2015 at 13:17
IDK if this is exaclty what you're looking for, but his might be helpful: geneticcoder.blogspot.com/2015/05/… — I wrestled a bear once.
– I wrestled a bear once., Commented Sep 14, 2015 at 13:18

uri2x · Accepted Answer · 2015-09-14 13:19:09Z

1

In your array_map function for the parameters, you can insert a check whether the parameter has a default value using ->isDefaultValueAvailable() and if so - list it using ->getDefaultValue(). See the example below based on your code and change it according to your needs.

Instead of

$obj['params'] = array_map(
  function($value){return $value->name;}, 
  $method->getParameters()
);

Use

$obj['params'] = array_map(
  function($value){
    return $value->name.
      ($value->isDefaultValueAvailable() ? '='.$value->getDefaultValue() : '');
  },
  $method->getParameters()
);

answered Sep 14, 2015 at 13:19

uri2x

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