Beginner PHP, wrote a program to show the weather forecast, but also look not laughed at.

Program | The weather forecast | Show just started to learn PHP, first compiled a program, on their own homepage, you can show the weather forecast, of course, still very imperfect, I hope everyone to give advice. The procedure is as follows:
?
$fcont =file ("http://www.bjmb.gov.cn/today.asp");
$arr =array ();
for ($i =0; $i <count ($fcont); $i + +) {
$tmp = $fcont [$i];
$tmp =ereg_replace ("<br>", "", $tmp);
if (!strstr (Strtolower ($tmp), "img")) {
$tmp =trim (Strip_tags ($tmp));
} else {
$st =ereg_replace ("><", ">⌒<", $tmp);
$stt =split ("⌒", $st);
foreach ($stt as $key => $value) {
if (Strstr ($value, "img")) {
$tmp = $value;
$tmp =ereg_replace ("src=", "width=30 height=30 align=absmiddle src=http://www.163design.net/p/b/", $tmp);
if (Strstr ($tmp, "bt9.jpg") | | | strstr ($TMP, "colline.gif") $tmp = "";
}
}
}
if (Trim ($tmp)!= "" && trim ($tmp)!= "") $arr []= $tmp;
}
$yb =array ();
For ($i =2 $i <count ($arr)-6; $i + +) {
$yb []= $arr [$i];
}
?>
<br>
<script language= "JavaScript" >
<!--
Syb= "";
?
$exp = " -3-7-9-14-18-20-25-";
for ($i =1; $i <count ($YB); $i + +) {
if (!strstr ($exp, "-". String) ($i + 1). " -")){
?>
syb=syb+ ' <?= $yb [$i];? > ';
;?}}? >
document.write ("<?= $yb [0]?>" + ":");
document.write ("<marquee width=400 align=middle scrollamount=5 scrolldelay=200>" +syb+ "forecast </marquee>");
-->
</SCRIPT>
The statement that was obtained only needs to be executed once, then compares the acquired data with the old data, whether it is new, replaces the old data if it is new, and does not replace it. This is the law can be found, first judge time, generally than the forecast time of one hours later, certainly can get the latest forecast data. But now I don't think so much, later say it!