多个数组转换成字符串,该怎么处理

$a = Array ( 0 => 1, 1 => 2, 2 => 3 );<br />$b = Array ( 0 => 1, 1 => 2, 2 => 2 );<br />$c = Array ( 0 => 128, 1 => 108, 2 => 420 );<br />$d = Array ( 0 => 128, 1 => 216, 2 => 840 );<br /><br />echo foo($a, $b, $c, $d);<br /><br />function foo() {<br />  foreach(func_get_args() as $t) {<br />    foreach($t as $i=>$v)<br />      $r[$i][] = $v;<br />  }<br />  foreach($r as $i=>$v)<br />    $r[$i] = join('<br><font color='#FF8000'>------解决方案--------------------</font><br>', $v);<br />  return join('<br><font color='#FF8000'>------解决方案--------------------</font><br>~', $r);<br />}<br />