PHP接口访问数据库时如何避免插入空数据？

<?php
// 增加记录
include_once('conn.php');

$name=$_post['name'];
$jg=$_post['jg'];
$dw=$_post['dw'];
$yxq=$_post['yxq'];
$ccff=$_post['ccff'];
$bzgg=$_post['bzgg'];
$jj=$_post['jj'];
$tp=$_post['tp'];
$xq=$_post['xq'];
$fl=$_post['fl'];
$ssc=$_post['ssc'];
$fwcs=1;
$time=$_post['time'];
$sql="insert into `gallery` (`name`, `jg`, `dw`, `yxq`, `ccff`, `bzgg`, `flm`, `jj`, `xq`, `tp`, `fwcs`, `ssc`) values ( '".$name."', '".$jg."', '".$dw."', '".$yxq."', '".$ccff."', '".$bzgg."', '".$fl."', '".$jj."', '".$xq."', '".$tp."', '".$fwcs."', '".$ssc."');)";
$res=$conn->exec($sql);

<?php
// 增加记录
include_once('conn.php');

if(empty($_POST)){
    exit(json_encode(array(
        "status"=>false,
        "info"=>"add error, empty!",
        "sql"=>''
    ),JSON_UNESCAPED_UNICODE));
}

$name=$_POST['name'];
$jg=$_POST['jg'];
$dw=$_POST['dw'];
$yxq=$_POST['yxq'];
$ccff=$_POST['ccff'];
$bzgg=$_POST['bzgg'];
$jj=$_POST['jj'];
$tp=$_POST['tp'];
$xq=$_POST['xq'];
$fl=$_POST['fl'];
$ssc=$_POST['ssc'];
$fwcs=1;
$time=$_POST['time'];
$sql="INSERT INTO `gallery` (`name`, `jg`, `dw`, `yxq`, `ccff`, `bzgg`, `flm`, `jj`, `xq`, `tp`, `fwcs`, `ssc`) VALUES ( '".$name."', '".$jg."', '".$dw."', '".$yxq."', '".$ccff."', '".$bzgg."', '".$fl."', '".$jj."', '".$xq."', '".$tp."', '".$fwcs."', '".$ssc."');)";
$res=$conn->exec($sql);