在php中显示SQL查询结果

I'm tring to diplay results in php from sql database MySQL statement is correct and does what i want in phpMyAdmin but for some reason my code breaks in the webpage

我想从sql数据库中显示php的结果MySQL语句是正确的并且在phpMyAdmin中做我想要的但是由于某种原因我的代码在网页中断了

here is the code

这是代码

require_once('db.php');  
$sql="SELECT * FROM  modul1open WHERE idM1O>=(SELECT FLOOR( MAX( idM1O ) * RAND( ) )  FROM  modul1open) 
ORDER BY idM1O LIMIT 1"

$result = mysql_query($sql);
echo [$result];

and here is what i get

这就是我得到的

In general I need random number limited from min to max by the table id

一般来说,我需要通过表id限制从min到max的随机数

3 个解决方案

#1

You need to fetch the data from each row of the resultset obtained from the query. You can use mysql_fetch_array() for this.

您需要从查询中获取的结果集的每一行中获取数据。你可以使用mysql_fetch_array()。

// Process all rows
while($row = mysql_fetch_array($result)) {
    echo $row['column_name']; // Print a single column data
    echo print_r($row);       // Print the entire row data
}

Change your code to this :

将您的代码更改为:

require_once('db.php');  
$sql="SELECT * FROM  modul1open WHERE idM1O>=(SELECT FLOOR( MAX( idM1O ) * RAND( ) )  FROM  modul1open) 
ORDER BY idM1O LIMIT 1"

$result = mysql_query($sql);
while($row = mysql_fetch_array($result)) {
    echo $row['fieldname']; 
}

#2

You need to do a while loop to get the result from the SQL query, like this:

您需要执行while循环以从SQL查询中获取结果,如下所示:

require_once('db.php');  
$sql="SELECT * FROM  modul1open WHERE idM1O>=(SELECT FLOOR( MAX( idM1O ) * RAND( ) )    
FROM modul1open) ORDER BY idM1O LIMIT 1";

$result = mysql_query($sql);

while($row = mysql_fetch_array($result, MYSQL_ASSOC)) {

    // If you want to display all results from the query at once:
    print_r($row);

    // If you want to display the results one by one
    echo $row['column1'];
    echo $row['column2']; // etc..

}

Also I would strongly recommend not using mysql_* since it's deprecated. Instead use the mysqli or PDO extension. You can read more about that here.

此外,我强烈建议不要使用mysql_ *,因为它已被弃用。而是使用mysqli或PDO扩展。你可以在这里阅读更多相关信息。

#3

You cannot directly see the query result using mysql_query its only fires the query in mysql nothing else.

您不能使用mysql_query直接查看查询结果,它只会在mysql中激活查询。

For getting the result you have to add a lil things in your script like

要获得结果,您必须在脚本中添加一些内容

require_once('db.php');  
 $sql="SELECT * FROM  modul1open WHERE idM1O>=(SELECT FLOOR( MAX( idM1O ) * RAND( ) )  FROM  modul1open) ORDER BY idM1O LIMIT 1";

 $result = mysql_query($sql);
 //echo [$result];
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
    print_r($row);
}

This will give you result;

这会给你结果;

#1