由
Array ( [0] => 1 [1] => yu [2] => 内容一 [3] => 3 [4] => sx [5] => 内容二 [6] => 4 [7] => yy [8] => 内容三 )
转成
Array ( [0] => Array
(
[0] => 1
[1] => yu
[2] => 内容一
) [1] => Array
(
[0] => 3
[1] => sx
[2] => 内容二
) [2] => Array
(
[0] => 4
[1] => yy
[2] => 内容三
)
)
Array ( [0] => 1 [1] => yu [2] => 内容一 [3] => 3 [4] => sx [5] => 内容二 [6] => 4 [7] => yy [8] => 内容三 )
转成
Array ( [0] => Array
(
[0] => 1
[1] => yu
[2] => 内容一
) [1] => Array
(
[0] => 3
[1] => sx
[2] => 内容二
) [2] => Array
(
[0] => 4
[1] => yy
[2] => 内容三
)
)
for($i=0;$i<count($arr);$i++)
{
if($i%3==0)
$k++;
$array[$k] = $arr[$i];
}
if($i<count($arr-1)){
$str.=$arr[$i].",";
}else{
$str.=$arr[$i];
}}
array_merge($str)