array_walk callback in class

[dewen]

I'm trying to change the case to lower for an array in class:

array_walk ($this->body_chunk, '$this-SpellStrToLower');
function SpellStrToLower ($str){
return strtolower ($str);
}

but it give me error as:

Unable to call $this->SpellStrToLower() - function does not exist

Any idea how to make this callback? I also tried

array_walk ($this->body_chunk, 'strtolower');

doesn't work since it's in a class

[laserlight]

You could try:

array_walk($this->body_chunk, array($this, 'SpellStrToLower'));

based on an idea from [man]call_user_func/man

EDIT:
good point from tsinka, I copied the wrong example to work with.

[tsinka]

Hi,

try this one:

array_walk ($this->body_chunk, array($this,'SpellStrToLower'));

Thomas

[dewen]

Thanks for both

I tried again with it. Now the error's gone, and array does walk thru the defined func, but nothing take place, is that a reference issue?

Here's full test code:

<?PHP

class ArrayWalk {

/**
 * properties:
 */
var $body_chunk = array('Dewen', 'PHP', 'Linux');

/////////////////////////////////////////////////
// VARIABLE METHODS
/////////////////////////////////////////////////

function ArrayWalk (){

}

function func_1(){

	print_r($this->body_chunk);
	array_walk ($this->body_chunk, array($this,'SpellStrToLower')); 
	print_r($this->body_chunk);
}

function SpellStrToLower ($str){ 
	return strtolower ($str); 
} 

}

$obj = new ArrayWalk();
echo '<PRE>';
$obj->func_1();
echo '</PRE>';
?>

[tsinka]

Ok,

change the function to

function SpellStrToLower (&$str){
$str = strtolower($str);
}

Thomas

[dewen]

That works. Thanks