Tricky php class method default parameter syntax

Question

I am having difficulty understanding the proper syntax for the second default value in the following method declaration statement. Any suggestions would be greatly appreciated. Thanks!

protected function load($columName = self::_tableIdName, $columnValue = self::_data->{self::_tableIdName}) 
{...}

Notes: $_tableIdName is a protected variable within the class; $_data is a protected stdClass object within the class.
I am trying to make the default for $columnValue equal to the corresponding value from the internal $_data object.

FYI, did you mean $columnName as the first parameter to the load function? You put $columName. — element119
– element119, Commented Sep 30, 2011 at 21:20

Byron Whitlock · Accepted Answer · 2011-09-30 21:15:17Z

5

Just set the defaults to null, then check for null in the function body. You are limited to using constants in the argument intializer.

answered Sep 30, 2011 at 21:15

Byron Whitlock

54.2k29 gold badges129 silver badges170 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Andy B Over a year ago

Well that now that you say it, I guess that should have obvious. Thanks much.

Collectives™ on Stack Overflow

Tricky php class method default parameter syntax

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related