php不允许我覆盖默认参数

Question

I can't seem to get php to accept dynamic values for parameters when I have a default specified. I've read here that the default value needs to be at the end of the function, which I've done.

$isbilling = true;

function retrieve_address($dbh, $customer_id, $isbilling=false){
echo $isbilling; //false
}

What am I doing wrong here?

Answer 1

You have set the default value for $isbilling to false, and you aren't passing anything to the $isbilling parameter when you call it (I'm assuming, since you didn't actually post that part).

Try this:

$isbilling = true;

function retrieve_address($dbh, $customer_id, $isbilling=false){
    echo $isbilling; //false
}

retrieve_address($dbh, $customer_id, $isbilling);