foreach loop problem

[PurpleMonkey]

ok I'm writing a function that can send back generic SQL statments. Here what I've got so far. The problem is I want it to NOT add a comma and a space when it reachs the final value in the array I send it:

<?php
function get_data($table, $fields, $clause, $clause_value) {

foreach($fields as $value) {

 $sql.= $value;

 if($value isn't the last member of the $fields array){

 $sql.=", ";

 }
}

$sql. = "select ".$sql."from $table where $clause = $clause_value";

}

[xblue]

would probably be possible the way you go about it, but why not simply employ implode() for this? sth like

if (is_array($fields)){
    $fields = implode(', ', fields);
}