PHP mysqli查询结果与foreach循环回显

Question

in my last project I used foreach loop to assign to every mysqli result a variable, like $r->mydata , but I formatted my pc accidentally, so I lost my core file and I can't remember how exactly I did that. I remember that I did something like this

$result = $db->query("SELECT * FROM data");
if($result->num_rows){
    while ($row = $result->fetch_object()) {
        foreach ($row as $r){
            $row[] = $r;
        }
    }
}

And I can access the result from outside the while loop like this:

<?php echo $r->mydata ?>

Can anyone edit my code so it will work like before?

Answer 1

it would be easier to use

$rows=$result->fetch_all(MYSQLI_ASSOC);

rather than looping through all the rows and building an array.

Answer 2

Maybe you don't remember how you did it, but if you did it once you should know at least which approach you followed to solve this, let help you to understand the code first:

$result = $db->query("SELECT * FROM data");
if($result->num_rows>0){
    //iterating only if the table is not empty
    while ($row = $result->fetch_object()) {
        //Here you are iterating each row of the database
        foreach ($row as $r){
            //Here you are iterating each column as $r
            //and (trying) adding it again to the $row array
            $row[] = $r;
        }
    }
}

Why would you like to access to the $row outside the loop, if what you want to do is print each row, you can do it inside the loop:

$result = $db->query("SELECT * FROM data");
if($result->num_rows>0){
    while ($row = $result->fetch_object()) {
        foreach ($row as $r){
            echo $r.'<br>';
        }
    }
}

Answer 3

If you do something like what follows, what part of the 'printed' data do you need? You may have been 'specializing' the result set by eliminating the rows to only use a single row...

$result = $db->query("SELECT * FROM data");

$r = new stdClass();

// Only loop if there is a result.
if ($result) 
{
    $r->myData = []; // You aren't exactly clear on 'myData'.  In this instance, I am setting the rows inside of it.
    while ($row = $result->fetch_object())
    {
        $r->myData[] = $row;
    }

    $result->close(); // Free result set
}

print_r($r->myData);

Answer 4

$records = array();
$result = $db->query("SELECT * FROM data");
if($result->num_rows){
 while ($row = $result->fetch_object()) {
   $records[] = $row;
   foreach($records as $r);
 }  
}

and now you can access the result from any place in the page,example echo inside html h1:

<h1>My name is: <?php echo $r->name ?></h1>