求教：帮我修改php
<?php // create short variable names $tireqty = $_POST[✀tireqty✀]; $oilqty = $_POST[✀oilqty✀]; $sparkqty = $_POST[✀sparkqty✀]; $address = $_POST[✀address✀]; $DOCUMENT_ROOT = $_SERVER[✀DOCUMENT_ROOT✀];?><html><head> <title>Bob✀s Auto Parts - Order Results</title></head><body><h1>Bob✀s Auto Parts</h1><h2>Order Results</h2><?php$date = date(✀H:i, jS F✀);echo ✀<p>Order processed at ✀;echo $date;echo ✀</p>✀;echo ✀<p>Your order is as follows: </p>✀;$totalqty = 0;$totalqty = $tireqty + $oilqty + $sparkqty;echo ✀Items ordered: ✀.$totalqty.✀<br />✀;if( $totalqty == 0){ echo ✀You did not order anything on the previous page!<br />✀;}else{ if ( $tireqty>0 ) echo $tireqty.✀ tires<br />✀; if ( $oilqty>0 ) echo $oilqty.✀ bottles of oil<br />✀; if ( $sparkqty>0 ) echo $sparkqty.✀ spark plugs<br />✀;}$totalamount = 0.00;define(✀TIREPRICE✀, 100);define(✀OILPRICE✀, 10);define(✀SPARKPRICE✀, 4);$totalamount = $tireqty * TIREPRICE + $oilqty * OILPRICE + $sparkqty * SPARKPRICE;$totalamount=number_format($totalamount, 2, ✀.✀, ✀ ✀);echo ✀<p>Total of order is ✀.$totalamount.✀</p>✀;echo ✀<p>Address to ship to is ✀.$address.✀</p>✀;$outputstring = $date."尀t".$tireqty." tires 尀t".$oilqty." oil尀t" .$sparkqty." spark plugs尀t尀$".$totalamount ."尀t". $address."尀n";// open file for appending@ $fp = fopen("$DOCUMENT_ROOT/../orders/orders.txt", ✀ab✀);flock($fp, LOCK_EX); if (!$fp){ echo ✀<p><strong> Your order could not be processed at this time. ✀ .✀Please try again later.</strong></p></body></html>✀; exit;} fwrite($fp, $outputstring, strlen($outputstring));flock($fp, LOCK_UN); fclose($fp);echo ✀<p>Order written.</p>✀; ?></body></html>html页代码：<html><head> <title>Bob✀s Auto Parts<⼀title><⼀head><body><h1>Bob✀s Auto Parts<⼀h1><h2>Order Form<⼀h2><form action="processorder.php" method=post><table border=0><tr bgcolor=#cccccc> <td width=150>Item<⼀td> <td width=15>Quantity<⼀td><⼀tr><tr> <td>Tires<⼀td> <td align=left><input type="text" name="tireqty" size=3 maxlength=3><⼀td><⼀tr><tr> <td>Oil<⼀td> <td align=left><input type="text" name="oilqty" size=3 maxlength=3><⼀td><⼀tr><tr> <td>Spark Plugs<⼀td> <td align=left><input type="text" name="sparkqty" size=3 maxlength=3><⼀td><⼀tr><tr> <td>Shipping Address<⼀td> <td align=center><input type="text" name="address" size=40 maxlength=40><⼀td><⼀tr><tr> <td colspan=2 align=center><input type=submit value="Submit Order"><⼀td><⼀tr><⼀table><⼀form> <⼀body><⼀html>
