Question

我的代码是：

$text = '12-10-4-32-45-name-sara-x-y-86';
$array = explode('-',$text);
foreach($array as $value) {
    $sql = mysql_query("SELECT * FROM `table` WHERE `pid`='$value' ORDER BY `id` LIMIT 3");
    while($row = mysql_fetch_array($sql)) {
        echo $row['title'];
        echo '';
    }
    echo '';
}

此代码完整但如果在$ text中使用150变量，服务器关闭！

如何针对大多数变量优化此代码？！

THX

Answer 1

如果你需要所有这些作为id（包括一个很奇怪的字符串）。考虑这个例子：

$text = '12-10-4-32-45-name-sara-x-y-86';
$text = array_unique(explode('-', $text)); // just in case there are duplicate ids
$statement = 'SELECT * FROM `table` WHERE `pid` IN("'.implode('", "', $text).'") ORDER BY `id` LIMIT 3';

// should be like this
// SELECT * FROM `table` WHERE `pid` IN("12", "10", "4", "32", "45", "name", "sara", "x", "y", "86") ORDER BY `id` LIMIT 3
// then just continue on your mysql_query
$sql = mysql_query($statement);
while($row = mysql_fetch_assoc($sql)) {
    // print your values or whatever it is you need to do
    // echo $row['title'];
}

注意：您不需要查询每个值，这将浪费资源。想象一下你的文字（正如你所说）有150个数字。尝试使用mysql的 IN() ，以便只进行一次查询。

在代码中如何优化？

1 个答案: