php函数-常用整理

//字符串截取
echo mb_substr("php点点通",1,3,"UTF-8");


if(isset($param['file'])){
    unset($param['file']);
}


// 取得列的列表
foreach ($data as $key => $row)
{
    $volume[$key]  = $row['volume'];
    $edition[$key] = $row['edition'];
}