我做一个成绩管理系统
php多循环，然后将数据下标循环最后写入数据库，PHP基础差，请求大侠们帮忙
$xk=Array ("1","2");
$nj=Array ("1","2","3");
$bj=Array ("1","2","3","4","5","6","7");
$xk=count($xk);
$nj=count($nj);
$bj=count($bj);
$test="$xk*$nj*$bj";
echo $test;
exit;
?>
晕，理解错了。、
该怎么理解呢
$xk=Array ("1","2");
$nj=Array ("1","2","3");
$bj=Array ("1","2","3","4","5","6","7");
$xk=count($xk);
$nj=count($nj);
$bj=count($bj);
$test="$xk*$nj*$bj";
echo $test;
exit;
?>
我是要生成INSERT INTO语句该怎么写呢
INSERT INTO `examinfo` (`nj`,`bj`,`xk`) VALUES ($nj ,$bj ,$xk)，VALUES 后面要插入$xk*$nj*$bj这么多条，该怎么弄呢
到精华区找计算笛卡尔积的代码
写个笨方法。
$xk=Array ("1","2");
$nj=Array ("1","2","3");
$bj=Array ("1","2","3","4","5","6","7");
$arr = array();
for($i=0;$i
}
}
}
foreach($arr as $row){
//插入数据
}
这个有这么复杂嘛，用FOR可以做吗
for($i=0;$i$xk=Array ("1","2");$nj=Array ("1","2","3");$bj=Array ("1","2","3","4","5","6","7");$arr = array();for($i=0;$i<count($xk);$i++){ for($j=0;$j<count($nj);$j++){ for($k=0;$k<count($bj);$k++){ $arr[] = array($xk[$i],$nj[$j],$bj[$k]); } }}foreach($arr as $row){ //插入数据}登录后复制登录后复制登录后复制
写个笨方法。
$xk=Array ("1","2");
$nj=Array ("1","2","3");
$bj=Array ("1","2","3","4","5","6","7");
$arr = array();
for($i=0;$i
}
}
}
foreach($arr as $row){
//插入数据
}
这个好像可行，foreach里面插入数据该怎么写SQL语句呢
$xk=Array ("1","2");$nj=Array ("1","2","3");$bj=Array ("1","2","3","4","5","6","7");$arr = array();for($i=0;$i<count($xk);$i++){ for($j=0;$j<count($nj);$j++){ for($k=0;$k<count($bj);$k++){ $arr[] = array($xk[$i],$nj[$j],$bj[$k]); } }}foreach($arr as $row){ //插入数据}
$xk=Array ("1","2");$nj=Array ("1","2","3");$bj=Array ("1","2","3","4","5","6","7");$arr = array();for($i=0;$i<count($xk);$i++){ for($j=0;$j<count($nj);$j++){ for($k=0;$k<count($bj);$k++){ $arr[] = array($xk[$i],$nj[$j],$bj[$k]); } }}foreach($arr as $row){ //插入数据}
$xk=Array ("1","2");$nj=Array ("1","2","3");$bj=Array ("1","2","3","4","5","6","7");$arr = array();for($i=0;$i<count($xk);$i++){ for($j=0;$j<count($nj);$j++){ for($k=0;$k<count($bj);$k++){ $arr[] = array($xk[$i],$nj[$j],$bj[$k]); } }}foreach($arr as $row){ $sql = "INSERT INTO `examinfo` (`nj`,`bj`,`xk`) VALUES ('".$row[0]."' ,'".$row[1]."','".$row[2]."')";}
$xk=Array ("1","2");$nj=Array ("1","2","3");$bj=Array ("1","2","3","4","5","6","7");$arr = array();for($i=0;$i<count($xk);$i++){ for($j=0;$j<count($nj);$j++){ for($k=0;$k<count($bj);$k++){ $arr[] = array($xk[$i],$nj[$j],$bj[$k]); } }}foreach($arr as $row){ $sql = "INSERT INTO `examinfo` (`nj`,`bj`,`xk`) VALUES ('".$row[0]."' ,'".$row[1]."','".$row[2]."')";}晕咯。哥们，你想实现怎么不自己想想呢。不能指望别人什么都给你做好，别人只能给你思路啊。。
晕咯。哥们，你想实现怎么不自己想想呢。不能指望别人什么都给你做好，别人只能给你思路啊。。
嗯，有这个思路，我可以继续往下做了，谢谢，优化的事我有思路了，谢谢了
