删除所有但最后一个逗号

Question

i have the following code:

while (list($key, $value) = each($arr)) {

    $implode_keys_values = @"$key=$value,";



    echo"$implode_keys_values";
}

which ends up echoing out xxxx=xxxx,xxxx=xxxx,xxxx=xxxx,xxxx=xxxx, depending on how many keys/values there are.

how do I take this dynamically changing string and remove the very last comma on it?

keep in mind:

$implode_keys_values = substr($implode_keys_values,0,-1);

will not work, it will take out all the commas.

Answer 1

In your case, this would be a better way to implement implode():

$data = array();
while (list($key, $value) = each($arr)) {
   $data[] = "$key=$value";
}
echo implode(",",$data);