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HomeBackend DevelopmentPHP Tutorial搜索同个表 N个字段的值。



表1  字段1  字段2

 GET来一个值 name

  先搜索 字段1 如果没值,在搜索字段2。。这个有人有经验吗?


回复讨论(解决方案)



表1  字段1  字段2

 GET来一个值 name

  先搜索 字段1 如果没值,在搜索字段2。。这个有人有经验吗?

  如果字段1 搜索到N个结果,就循环N个结果,如果1个结果都没在搜索字段2,在循环字段2的值。

如果有 M 个字段,你就搜索 M 次?!
那你就在循环里搜索就是了
反正没有人会这么做的

依次判断下去就是了,不过就是麻烦点。

如果有 M 个字段,你就搜索 M 次?!
那你就在循环里搜索就是了
反正没有人会这么做的

只搜索2个字段,2个字段没搜到结果就退出了。

依次判断下去就是了,不过就是麻烦点。


有什么思路吗?swite 吗?

if  ... else 咯

if  ... else 咯

$n=$_GET['name']

$sou="select * from xclass where Name like '%$n%'";
$ss=$mysqli->query($sou);
while($s=$ss->fetch_assoc()){
    echo $z=$s['Name'];
}
//判断上边的z有没值,没值就搜索 字段2
if(isset($z)){
$zais="select * from xclass where Item1 like '%$n%'";
$zaiss=$mysqli->query($zais);
while($sss=$zaiss->fetch_assoc()){
    echo $zaisou=$sss['Item1'];
}
}


$n = $_GET['name'];$sou[] = "select * from xclass where Name like '%$n%'";$sou[] = "select * from xclass where Item1 like '%$n%'";foreach($sou as $sql) {  $rs = $mysqli->query($sql);  if($rs->num_rows) break;}while($sss = $rs->fetch_assoc()){    echo $zaisou=$sss['Item1'];}

$sou[]  变量后边加了个 [] 符号代表什么意思?

代码它是一个数组

更正:
代表它是一个数组 

空数组,然后 select 的结果赋值给他?

不是select的结果,是将那个sql串赋值给他。
$arr[]='xx' ;  // 是在数组的后面加上一个值为xx的元素  索引从0,1,2,... 递增。

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