如何将数组值添加到MySQL查询？

我使用下面的代码的MySQL查询到时间/日期排序：如何将数组值添加到MySQL查询？

mysql_select_db("user_live_now", $con); 

$result = mysql_query("SELECT * FROM users_newest_post ORDER BY users_date_post DESC"); 

while($row = mysql_fetch_array($result)) 
    { 
     print($row['user']); 
    }

而不是让PHP运行通过，并显示在表中的所有值，我可以把它从一个数组显示值？

来源

2011-04-06 John Doe

您的意思是只显示特定用户？ – Jon 2011-04-06 00:11:07

是的！那正是我需要的。 – 2011-04-06 00:12:08

然后以这样的方式构建SQL查询，只返回您感兴趣的用户。查找与'SELECT ... WHERE user IN（'foo'，'bar'）'类似的语法。 – Jon 2011-04-06 00:13:49

那么，你想在SQL查询中找到特定的用户来返回？编程方式构建查询：

$users = array('User1','John','Pete Allport','etc'); 

$sql = "SELECT * FROM `users_newest_post` WHERE "; 
$i = 1; 
foreach($users as $user) 
{ 
    $sql .= "`username` = '$user'"; 
    if($i != count($users)) 
    { 
     $sql .= " OR "; 
    } 
    $i++; 
} 
$sql .= " ORDER BY `users_date_post` DESC"; 
$result = mysql_query($sql);

这将让你像一个查询：

SELECT * FROM `users_newest_post` 
WHERE `username` = 'User1' 
OR `username` = 'John' 
OR `username` = 'Pete Allport' 
OR `username` = 'etc' 
ORDER BY `users_date_post` 
DESC

所以，你要找到某个特定日期或两个日期之间的所有帖子，有点难以做到这一点不知道表结构，但你有这样的事情做到这一点：

//Here's how to find all posts for a single date for all users 
$date = date('Y-m-d',$timestamp); 
//You'd pull the timestamp/date in from a form on another page or where ever 
//Like a calendar with links on the days which have posts and pass the day 
//selected through $_GET like page.php?date=1302115769 
//timestamps are in UNIX timestamp format, such as you'd get from time() or strtotime() 
//Note that, without a timestamp parameter passed to date() it uses the current time() instead 

$sql = "SELECT * FROM `posts` WHERE `users_date_post` = '$date'" 
$results = mysql_query($sql); 
while($row = mysql_fetch_assoc($results)) 
{ 
    echo $row['post_name'] . $row['users_date_post']; //output something from the posts 
} 

//Here's how to find all posts for a range of dates 
$startdate = date('Y-m-d',$starttimestamp); 
$enddate = date('Y-m-d',$endtimestamp); 
//Yet again, date ranges need to be pulled in from somewhere, like $_GET or a POSTed form. 
//Can also just pull in a formatted date rather than a timestamp and use it straight up instead, rather than going through date() 
$sql = "SELECT * FROM `posts` WHERE `users_date_post` BETWEEN '$startdate' AND '$enddate'"; 

//could also do: 
//"SELECT * FROM `posts` WHERE `users_date_post` > '$startdate' AND `users_date_post` < '$endate'" 

$results = mysql_query($sql); 
while($row = mysql_fetch_assoc($results)) 
{ 
    //output data 
}

要查找特定用户的帖子，你会修改声明是这样的：

$userid = 5; //Pulled in from form or $_GET or whatever 
"SELECT * FROM `posts` WHERE `users_date_post` > '$startdate' AND `users_date_post` < '$enddate' AND `userid` = $userid"

来源

2011-04-06 00:51:53 Phoenix

如果我需要所有这些值，该怎么办？ – 2011-04-06 01:02:33

你是什么意思？哪些值？ – Phoenix 2011-04-06 01:07:49

所有的人：约翰，皮特奥尔波特等，我试图从所有用户的表中拉出用户的朋友，如果这是有道理的？ – 2011-04-06 01:10:11

要转储结果到一个数组执行以下操作：

mysql_select_db("user_live_now", $con); 

$result = mysql_query("SELECT * FROM users_newest_post ORDER BY users_date_post DESC"); 

while($row=mysql_fetch_assoc($result)) 
{ 
    $newarray[]=$row 
}

来源

2011-04-06 00:13:12 gunwin

不，不，这很好，除非我需要能够将数组加载到查询中，如果有意义的话 – 2011-04-06 00:16:21

你可能想要做的是这样的：

$users = array("Pete", "Jon", "Steffi"); 

$users = array_map("mysql_real_escape_string", $users); 
$users = implode(",", $users); 

..("SELECT * FROM users_newest_post WHERE FIND_IN_SET(user, '$users')");

的FIND_IN_SET函数是低效的，但是为了这个目的。但是，如果真的有需要，你可以转换到IN子句，再输入一点。

来源

2011-04-06 00:22:00 mario

$sql = 'SELECT * FROM `users_newest_post` WHERE username IN (' . implode(',', $users) . ')';

来源

2011-04-06 18:54:48 dar7yl

如何将数组值添加到MySQL查询？

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