用PHP和ACCESS写聊天室(十)

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　　 func.php3
代码如下：
<?php
function suiji($max)
{
        srand((double)microtime()*1000000);
        $x=rand();

        $y=getrandmax();
        $r=$x/$y*($max-1);
        $r=round($r++);
        return $r;
}

function StrOccurs($sStr, $sFind){
        $sTemp=$sStr;
        $iLen=strlen($sFind);
        $iCount=0;
        while (true){
                if (strstr($sTemp, $sFind))
                        break;
                else
                        $sTemp = instr($sTemp,strpos($sTemp,$sFind)+$iLen);
                        $iCount++;
                }
        }
        return $iCount;
}

function StrDupl($sStr, $iCnt){
        $ret="";
        for($i=1;$i<=$iCnt;$i++)
                $ret.=$sStr;
        return $ret;
}

function DelQuot($sStr){
        $s=str_replace(chr(124),"&brvbar;",$sStr);
        $s=str_replace(chr(39),"&acute;",$s);
        $s=str_replace(chr(34),"&quot;",$s);
        return s;
}

function DelTag($sStr){
        $bNeed="False";
        $sOther=strtoupper($sStr);
        if ($bNeed!="True" || !strstr($sOther,"<TABLE")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</TABLE")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<SCRIPT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</SCRIPT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<BODY")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</BODY")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<HTML")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</HTML")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<HEAD")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</HEAD")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<FORM")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</FORM")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<INPUT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</INPUT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<OPTION")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</OPTION")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<SELECT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</SELECT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<APPLET")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</APPLET")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<OBJECT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</OBJECT")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<MENU")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</MENU")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<FRAMESET")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</FRAMESET")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<FRAME")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</FRAME")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<IFRAME")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</IFRAME")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<STYLE")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"</STYLE")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"<BASE")) $bNeed="True";
        if ($bNeed!="True" || !strstr($sOther,"FONT-SIZE:")) $bNeed="True";
        if ($bNeed=="True")
                return str_replace(">","&gt;",str_replace("<","&lt;",$sStr));
        else
                return $sStr;
}

function AddLost($sStr){
        $ret=$sStr;
        $ret.=StrDupl(">", (StrOccurs(strtoupper($ret), "<") - StrOccurs(strtoupper($ret), ">")));
        $ret.=StrDupl("</FONT>", (StrOccurs(strtoupper($ret), "<FONT") - StrOccurs(strtoupper($ret), "</FONT>")));
        $ret.=StrDupl("</B>", (StrOccurs(strtoupper($ret), "<B") - StrOccurs(strtoupper($ret), "</B>")));
        $ret.=StrDupl("</I>", (StrOccurs(strtoupper($ret), "<I") - StrOccurs(strtoupper($ret), "</I>")));
        $ret.=StrDupl("</U>", (StrOccurs(strtoupper($ret), "<U") - StrOccurs(strtoupper($ret), "</U>")));
        $ret.=StrDupl("</S>", (StrOccurs(strtoupper($ret), "<S") - StrOccurs(strtoupper($ret), "</S>")));
        $ret.=StrDupl("</STRIKE>", (StrOccurs(strtoupper($ret), "<STRIKE") - StrOccurs(strtoupper($ret), "</STRIKE>")));
        $ret.=StrDupl("</STRONG>", (StrOccurs(strtoupper($ret), "<STRONG") - StrOccurs(strtoupper($ret), "</STRONG>")));
        $ret.=StrDupl("</SMALL>", (StrOccurs(strtoupper($ret), "<SMALL") - StrOccurs(strtoupper($ret), "</SMALL>")));
        $ret.=StrDupl("</CITE>", (StrOccurs(strtoupper($ret), "<CITE") - StrOccurs(strtoupper($ret), "</CITE>")));
        $ret.=StrDupl("</EM>", (StrOccurs(strtoupper($ret), "<EM") - StrOccurs(strtoupper($ret), "</EM>")));
        $ret.=StrDupl("</CODE>", (StrOccurs(strtoupper($ret), "<CODE") - StrOccurs(strtoupper($ret), "</CODE>")));
        $ret.=StrDupl("</SAMP>", (StrOccurs(strtoupper($ret), "<SAMP") - StrOccurs(strtoupper($ret), "</SAMP>")));
        $ret.=StrDupl("</KBD>", (StrOccurs(strtoupper($ret), "<KBD") - StrOccurs(strtoupper($ret), "</KBD>")));
        $ret.=StrDupl("</VAR>", (StrOccurs(strtoupper($ret), "<VAR") - StrOccurs(strtoupper($ret), "</VAR>")));
        $ret.=StrDupl("</DFN>", (StrOccurs(strtoupper($ret), "<DFN") - StrOccurs(strtoupper($ret), "</DFN>")));
        $ret.=StrDupl("</BIG>", (StrOccurs(strtoupper($ret), "<BIG") - StrOccurs(strtoupper($ret), "</BIG>")));
        $ret.=StrDupl("</SUP>", (StrOccurs(strtoupper($ret), "<SUP") - StrOccurs(strtoupper($ret), "</SUP>")));
        $ret.=StrDupl("</SUB>", (StrOccurs(strtoupper($ret), "<SUB") - StrOccurs(strtoupper($ret), "</SUB>")));
        $ret.=StrDupl("</H1>", (StrOccurs(strtoupper($ret), "<H1") - StrOccurs(strtoupper($ret), "</H1>")));
        $ret.=StrDupl("</H2>", (StrOccurs(strtoupper($ret), "<H2") - StrOccurs(strtoupper($ret), "</H2>")));
        $ret.=StrDupl("</H3>", (StrOccurs(strtoupper($ret), "<H3") - StrOccurs(strtoupper($ret), "</H3>")));
        $ret.=StrDupl("</H4>", (StrOccurs(strtoupper($ret), "<H4") - StrOccurs(strtoupper($ret), "</H4>")));
        $ret.=StrDupl("</H5>", (StrOccurs(strtoupper($ret), "<H5") - StrOccurs(strtoupper($ret), "</H5>")));
        $ret.=StrDupl("</H6>", (StrOccurs(strtoupper($ret), "<H6") - StrOccurs(strtoupper($ret), "</H6>")));
        $ret.=StrDupl("</H7>", (StrOccurs(strtoupper($ret), "<H7") - StrOccurs(strtoupper($ret), "</H7>")));
        return $ret;
}
?>

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