怎么循环输出含有tr的td

foreach(array_chunk($arr1,4) as $v){
      echo "\n";
    foreach($v as $t) echo "".$t."\n";
    echo "\n";
};

------解决方案--------------------
$arr1=array("a","b","c","d","e","f","g"); 

$i = 1;
echo '';
foreach ($arr1 as $key=>$val)
{
	echo '' , $val, '';
	if($i%4 == 0) echo "";
	++$i;
}
echo '';