php - 未定義の変数: apcu php スクリプトの構成と問題

Question

PHP 警告: モジュール 'apcu' は、行 0 の Unknown に既にロードされています PHP 通知: 未定義の変数: main_content の /var/www/html/system/pages/bounty.php 行 5 PHP 通知: 未定義の変数: /var/ の構成www/html/system/pages/bounty.php on line 44 PHP Notice: 行 44 の /var/www/html/system/pages/bounty.php の null 型の値の配列オフセットにアクセスしようとしています PHP Notice: Trying to /var/www/html/system/pages/bounty.php の 44 行目の null 型の値の配列オフセットにアクセスします。

     <?php
@mysqli_connect("localhost","newuser","password");
@mysqli_select_db("ots");

$main_content .= '<P ALIGN=CENTER>
    <br>
    <FONT SIZE=5 COLOR=#CFF00C>
        How to use...
    </FONT>
    <br>
    <br>
    <FONT SIZE=2 COLOR=#CFF00C>
    * !hunt [prize],[nick] :
        <FONT SIZE=1 COLOR=#FCC33F>
            Wysyla ogloszenie o huncie dla postaci. Cena w tysiacach.<br>
            Przyklad: !hunt 100,Infinity
        </FONT><br>
    </FONT>
</P>
<br>
<br>
    <center>
        <h1>
            Bounty Hunters
        </h1>
    </center>
        <TABLE BORDER=0 CELLSPACING=1 CELLPADDING=4 WIDTH=100%>
            <TR BGCOLOR="#505050">
                <TD CLASS=white width=30%>
                    <center><B>Zlecil</B></center>
                </TD>
                <TD CLASS=white width=30%>
                    <center><B>Nagroda</B></center>
                </TD>
                <TD CLASS=white width=30%>
                    <center><B>Ofiara</B></center>
                </TD>
                <TD CLASS=white width=10%>
                    <center><B>Zabity przez</B></center>
                </TD>
            </TR>';
 $inv = @mysqli_query("SELECT * FROM `bounty_hunters` ORDER BY `added` DESC");
$num = 0;
$color=$config['site']['darkborder'];
while($tab = @mysqli_fetch_array($inv)){
if($num%2 == 0){$color=$config['site']['darkborder'];}else{$color=$config['site']['lightborder'];}
$pid = $tab['fp_id'];
$sid = $tab['sp_id'];
$kid = $tab['k_id'];
$killed = $tab['killed'];
$prize = $tab['prize']*1000;
if($killed == 0){
$kill = '<font color="red">Nobody!</font>';
}else{
$k = @mysqli_query("SELECT * FROM `players` WHERE `id` = ".$kid."");
$k1 = @mysqli_fetch_array($k);
$kill_name = $k1['name'];
$kill = '<a href="index.php?subtopic=characters&name='.$kill_name.'">'.$kill_name.'</a>';
}
$f = @mysqli_query("SELECT * FROM `players` WHERE `id` = ".$pid."");
$f1 = @mysqli_fetch_array($f);
$s = @mysqli_query("SELECT * FROM `players` WHERE `id` = ".$sid."");
$s1 = @mysqli_fetch_array($s);
$fn = $f1['name'];
$sn = $s1['name'];

$main_content .= '
        <TR BGCOLOR="'.$color.'">
            <TD>
                <center>
                    <b>
                        <a href="index.php?subtopic=characters&name='.$fn.'">'.$fn.'</a>
                    </b>
                </center>
            </TD>
            <TD>
                <center>
                    <b>
                        '.$prize.' gp
                    </b>
                </center>
            </TD>
            <TD>
                <center>
                    <b>
                        <a href="index.php?subtopic=characters&name='.$sn.'">'.$sn.'</a>
                    </b>
                </center>
            </TD>
            <TD>
                <center>
                    <b>
                        '.$kill.'
                    </b>
                </center>
            </TD>
        </TR>';
$num++;
}
if($num == 0){
        $main_content.='<TR BGCOLOR="'.$color.'">
            <TD colspan=4>
                <center>
                    Currently there are not any bounty hunter offer.
                </center>
            </TD>
        </TR>';
}
        $main_content .='</TABLE><div align="right"></a>.</div>';
?>