Question

我有一个表格，其中一列包含像文字一样的表面：＆＃34; 200 300 450 557＆＃34; 用户搜索表面，给出我得到的2个变量$ min和$ max的范围。我需要选择在该时间间隔内具有表面的所有属性。

这里我有很长的解决方案，但我相信在选择中有一个较短的...

$min=$_GET["min"]; // min price given by user - like 1000 euro
$max=$_GET["max"]; // max price given by user - like 2500 euro

$result=mysql_query("SELECT * FROM `offers`");

$nr=mysql_numrows($result);
while( $i<$nr) {
    $surface=mysql_result($result,$i,"surface"); // something like "100 200 250 350" sqm
    $price=mysql_result($result,$i,"price"); // this is per square metter like "12" euro/sqm
    $s=explode(' ',$surface);

    if ($s[$i]*$price<=$max && $s[$i]*$price>=$min) // i don't know if it sees it like number or char???
    {
        $id = mysql_result($result,$i,"id");
        $area = mysql_result($result,$i,"area");
        $details = = mysql_result($result,$i,"det");

        // do something with them

    };
}

关键是我需要最简单的多重搜索解决方案。如果我有一个单一的表面，代码将是这样的：

"SELECT * FROM `offers` WHERE (surface between $min and $max) && (price between $pmin and $pmax)&&(area='$area') ORDER BY `id` DESC LIMIT 50;"

但如果我的表面像＆＃34; 123 300 500 790 ......＆＃34;我该怎么办？只有一个选择是否可能？

由于

Answer 1

使用min和max作为数组

if((min($s) * $price) >= $min && (max($s) * $price) <= $max)
{
    $id = mysql_result($result,$i,"id");
    $area = mysql_result($result,$i,"area");
    $details = = mysql_result($result,$i,"det");

    // do something with them
}

Answer 2

为什么不在查询中使用min / max？像这样:(未经测试）

$min=$_GET["min"]; // min price given by user - like 1000 euro
$max=$_GET["max"]; // max price given by user - like 2500 euro

// select from offers where price > min and price < max
$result=mysql_query(sprintf("SELECT * FROM `offers` WHERE `price` > %d AND `price` < %d",
    mysql_real_escape_string($min),
    mysql_real_escape_string($max)
));

$offers=mysql_numrows($result);

// loop over the offers
foreach($offers as $offer){
    $id = $offer['id'];
    $price = $offer['price'];

    // do something 
}

现在请记住，mysql_query()已被弃用。我建议做一个PDO教程。

PDO教程：http://code.tutsplus.com/tutorials/why-you-should-be-using-phps-pdo-for-database-access--net-12059

检查表数组值是否在范围内

2 个答案: