Performing query inside active row array - php

Question

Basically i'm using an mySQLi wrapper i've found online and while trying to use it i've came across a problem i can't see to get past, basically, i'm performing this.
<?php
$res = $DB->Query("SELECT * FROM `table`");
while($row = $DB->Fetch()) {
?>
<tr>
<td><?php echo $row['id']; ?></td>
<td><?php echo $functions->checkStatus($row['arowhere']); ?></td>
</tr>
<?php
}
?>
So when i'm trying to do this $functions->checkStatus($row['arowhere']); it performs a new query inside this function on my table row, it's changing the latest query which is being used for the while($row = $DB->Fetch()) {
public function Query($SQL) {
$this->SQL = $this->mysqli->real_escape_string($SQL);
$this->Result = $this->mysqli->query($SQL);
if ($this->Result == true) {
return true;
} else {
die('Problem with Query: ' . $this->SQL);
}
}
public function Fetch() {
return mysqli_fetch_assoc($this->Result);
}
Is there a solution or maybe someone point me in the correct direction so i can avoid this please.

Answer 1

I can't believe such a wrapper can be found online. As a matter of fact, it's completely, ultimately unusable.
Doing mysqli->real_escape_string($SQL); makes absolutely no sense. It won't protect your query from injection yet it will spoil whatever complex query. As soon as you will try to run a query with WHERE condition it will die from error.
And the following line is also wrong
die('Problem with Query: ' . $this->SQL);
as it's not showing you neither error nor file and line number.
And least this wrapper's problem is one you face - it is using internal variable to hold the result, while it should just return it.
A real mysqli wrapper is SafeMysql, which lets you to add whatever dynamical data via placeholders.
With SafeMysql your code would work:
<?php
$res = $DB->query("SELECT * FROM `table`");
while($row = $db->fetch($res)) {
?>
<tr>
<td><?php echo $row['id']; ?></td>
<td><?php echo $functions->checkStatus($row['arowhere']); ?></td>
</tr>
<?php
}
?>

Answer 2

You could iterate through the rows and add them to a temporary array. You could then reference the rows via this array after other queries have been made. This could have memory implications if there are too many rows being returned by the query, so be careful.
<?php
$res = $DB->Query("SELECT * FROM `table`");
$rows = array();
while($row = $DB->Fetch()) {
array_push( $rows, $row );
}
foreach( $rows as $row ){
?>
<tr>
<td><?php echo $row['id']; ?></td>
<td><?php echo $functions->checkStatus($row['arowhere']); ?></td>
</tr>
<?php
}
unset( $rows ); // destroys the temporary array, freeing the memory it consumed
?>