How to output a single value from an associative array, given the key

[spryce]

I came up with this but it outputs the value 3 times... (because there are 3 variables)

 

ie mathsmathsmaths

 

How do I fix this or do it the correct way? Thanks

 

$subject = "maths";
$phone = "1235";
$colour = "red";
$all_vars = compact("subject", "phone", "colour");

get_value($subject);

function get_value($variable){
global $all_vars;
foreach($all_vars as $key=>$value){
	if ($key = $variable) {
		echo $key;
	}
}
}

[spryce]

talk about doing things the hard way.... 

 

echo $all_vars['subject'];