How can I optimise and improve the speed of this MySQL query? - php

Question

I am trying to get information from my database and display it. Here is a screenshot of what the page looks like:
The page loads really slow
Is there any way to make it load and display the data faster?
Here is the code.
<table align="center" class="pTable">
<tr class="main"> <th class="pTableHeader"> ID </th> <th class="pTableHeader"> Room </th> <th class="pTableHeader"> Status</th> </tr>
<?php
gc_enable();
gc_collect_cycles();
flush();
$this->mysql = new sqli('HIDDEN','HIDDEN','HIDDEN','HIDDEN');
$bots = $this->mysql->fetch_array("SELECT `pid`,`room`,`id` from `bots`;");
foreach ($bots as $b) {
if(is_numeric($b["room"])) {
$xat = file_get_contents('http://www.xat.com/xat'.trim($b["room"]));
$name = sp($xat, '<h1> ', '</h1>');
}
else $name = $b['room'];
//$b["pid"] = isset($b["pid"])?$b["pid"]:false;
//$online = \"start.php {$b['id']} {$b['id']}\"", $output) && count($output) > 1 ? true : false;
$online = file_exists("/proc/{$b['pid']}" )?true:false;
if($online === true) $status = "<font color='green'>Online</font> <div style='float:right'><img src='http://fexbots.com/Images/Pawns/online.png'> <a href='/botinfo?botid={$b["id"]}'>More info</a></div>";
else $status = "<font color='red'>Offline</font> <div style='float:right'><img src='http://fexbots.com/Images/Pawns/offline.png'> <a href='/botinfo?botid={$b["id"]}'>More info</a></div>";
if($b["room"] === '') {
$name = "No Room";
$status = "<font color='red'>Not Setup!</font> <div style='float:right'><img src='http://fexbots.com/Images/Pawns/hang.png'> <a href='/botinfo?botid={$b["id"]}'>More info</a></div>";
echo '<tr> <td> '.$b["id"].' </td> <td> No Room <td> '.$status.'</td> </tr>';
}
else echo "<tr> <td> ".$b['id']." </td> <td> <a href='http://www.xat.com/$name'>$name</a> <td> ".$status."</td> </tr>";
}
function sp($content, $start, $end, $lower=false) {
if($lower!=false) {
$content = strtolower($content);
$start = strtolower($start);
$end = strtolower($end);
}
$content = substr($content, strpos($content,$start)+strlen($start));
$content = substr($content, 0, strpos($content,$end));
return $content;
}
?>
</table>

Answer 1

You seem to download the content from an URL inside the loop. Maybe that is the cause to why it is slow and not the mysql query itself.
Try to write out some timestamps or comment some code out to see what is causing it to be slow.