Cậu dùng hàm này thử :
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>New document</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
</head>
<body>
<?php
function ham($chuoi)
{
$so_dau_phay=2;
$tu_ngan_cach=",";
$m=explode($tu_ngan_cach,$chuoi);
$k=-1;
for($i=0;$i<count($m);$i++)
{
$c="";
for($j=0;$j<=2;$j++)
{
if($m[$i]!="")
{
$c=$c.$m[$i].$tu_ngan_cach;
}
if($j==2){$k++;$c=substr($c,0,-1);}else{$i++;}
}
$m_1[$k]=$c;
}
return $m_1;
}
$mang=ham("Tối,nay,xem,wc,nhé,mấy,bạn");
echo "<b>In ra một mảng</b> :";
echo "<pre>";
print_r($mang);
echo "</pre>";
echo "<b>Truy xuất từng phần tử</b><br>";
echo "<b>Câu 1 : </b> ";
echo $mang[0];
echo "<br>";
echo "<b>Câu 2 : </b> ";
echo $mang[1];
echo "<br>";
echo "<b>Câu 3 : </b> ";
echo $mang[2];
echo "<br>";
?>
</body>
</html>