PHP: Using variables for calling object properties
I had a scenario at work today that need me to use a variable in an object and call it like I would when using keys in an array.
Like when I have an array, I would do something like this:
$foo = array("apple" => "Hello World!"); $bar = "apple"; echo $foo[$bar]; //OUTPUT: Hello World!
I was able to use a variable for an object property by simply using $variable.
$obj = new stdClass(); $obj->bar= 'Hello World!'; $foo = "bar"; echo $obj->$foo; //OUTPUT: Hello World!
I thought it would spit out an error. But it didn’t :P
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Comments ( 5 )
i think it’s the same way we use to write code for the “magic” methods __set()/__get() in a class, but used from an out-of-the-class perspective, isn’t it?
seralf added these pithy words on
Jul 09 09 at
8:17 PM
@seralf yup :-) I was chatting with my friend about this. And then the __set()/__get magic methods popped out of my head.
Wenbert added these pithy words on
Jul 09 09 at
9:17 PM
Sure it works ;-)
$o = new StdClass();
$o->{"var" . substr("variable", 3)} = 'value';
echo $o->variable; // outputs: "value"
Aleksandr Tsertkov added these pithy words on
Jul 10 09 at
4:09 AM
Stop using that in examples, it encourages deadshits to use it thus creating even more unmaintainable code!
Aleksandr Tsertkov's mum added these pithy words on
Jul 10 09 at
11:57 AM
It is needed at some points, so why not give the coder the tools and let him decide what’s best for him?
fealls added these pithy words on
Aug 22 09 at
2:27 PM
