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請幫我解決標題中指定的問題。爲什麼MySQL更新查詢在PHP不工作？
輸入表單頁面代碼：
<?
db_connect();
$query1 = "SELECT *, DATE_FORMAT(eventdate,'%m/%d/%y') AS
eventdate,DATE_FORMAT(throughdate,'%m/%d/%y') AS throughdate FROM events WHERE id = " . mysql_real_escape_string($_REQUEST['id']);
$result1 = mysql_query($query1) or die("Error - query failed " . mysql_error());
if (mysql_num_rows($result1) == 0) {
print "<p>Error - no such event.</p>\n";
return;
}
else {
$qry_event1 = mysql_fetch_array($result1);
}
// default the formaction to the query
if (! isset($_REQUEST['formaction'])) { $_REQUEST['formaction'] = 'query'; }
?>
<form name="eventform" method="post" action="act_updevent.php">
<input type="hidden" name="submit_check" value="1">
<input type="hidden" name="formaction" value="form">
<!-- if we are editing, $id will exist. Pass it along. -->
<input type="hidden" name="id" value="<?php $qry_event1['id'];?>">
<table>
<tr>
<td align="right" valign="center"><b><? displayformlabel('eventdate','Event Date:')?>
</b></td>
<td><input name="eventdate" value="<? echo $qry_event1['eventdate']; ?>">
<a name="calendar1here" id="calendar1here" href="JavaScript:;"
onClick="cal1.select(document.forms[0].eventdate,'calendar1here','MM/dd/yy'); return
false;">
<img src="resources/calendar.gif" alt="Calendar Icon" width="20" height="20"
border="0"></a>
</td>
</tr>
<tr>
<td align="right" valign="center"><b><? displayformlabel('throughdate','Through:')?>
</b></td>
<td><input name="throughdate" value="<? echo $qry_event1['throughdate']; ?>">
<a name="calendar2here" id="calendar2here" href="JavaScript:;"
onClick="cal2.select(document.forms[0].throughdate,'calendar2here','MM/dd/yy'); return
false;">
<img src="resources/calendar.gif" alt="Calendar Icon" width="20" height="20"
border="0"></a>
<span class="formnotes">Leave blank if only one day event</span>
</td>
</tr>
<tr>
<td align="right"><b><? displayformlabel('title','Event Title:')?></b></td>
<td><input name="title" size="50" maxlength="50" value="<? echo $qry_event1['title'];?
>"></td>
</tr>
<tr>
<td align="right"><? displayformlabel('website','Event Website:')?></td>
<td><input name="website" size="50" maxlength="100" value="<? echo
$qry_event1['website']; ?>"></td>
</tr>
<tr>
<td align="right"><? displayformlabel('email','Event Email:')?></td>
<td><input name="email" size="50" maxlength="100" value="<? echo
$qry_event1['email'];?>"></td>
</tr>
<tr>
<td align="right" valign="top"><? displayformlabel('notes','Notes:')?></td>
<td><textarea name="notes" style="width: 320px; height: 60px;"><? echo
$qry_event1['notes']; ?></textarea></td>
</tr>
<tr>
<td align="right"><? displayformlabel('venue','Venue:')?></td>
<td><input name="venue" size="50" maxlength="50" value="<? echo $qry_event1['venue'];?
>"></td>
</tr>
<tr>
<td align="right"><? displayformlabel('address','Address:')?></td>
<td><input name="address" size="50" maxlength="50" value="<?echo
$qry_event1['address'];?>"></td>
</tr>
<tr>
<td align="right"><? displayformlabel('city','City:')?></td>
<td><input name="city" size="50" maxlength="50" value="<?echo $qry_event1['city'];?
>"></td>
</tr>
<tr>
<td align="right"><? displayformlabel('state','State:')?></td>
<td><input name="state" size="3" maxlength="2" value="<?echo $qry_event1['state'];?
>"></td>
</tr>
<tr>
<td align="right"><? displayformlabel('lat','Latitude:')?></td>
<td><input name="lat" size="15" maxlength="15" value="<? echo $qry_event1['lat'];?>">
</td>
</tr>
<tr>
<td align="right"><? displayformlabel('lon','Longitude:')?></td>
<td><input name="lon" size="15" maxlength="15" value="<? echo $qry_event1['lon'];?>">
<span class="formnotes"><a href="JavaScript:;" onclick="lookUp()">Look up</a>
coordinates using above address information.</span>
</td>
</tr>
<tr>
<td align="right"><? displayformlabel('accurate','Accurate:')?></td>
<td><input name="accurate" type="checkbox" value="1" <?php if
(isset($qry_event1['accurate'])) { echo 'checked="checked"'; }?>>
<a href="JavaScript:;" class="formnotes" onClick="window.open('<?php
print $vsf->self;?>?action=accuratehelp','helpwin','width=435,height=220');">Whats
this?</a>
</td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Submit"></td>
</tr>
</table>
</form>
更新頁面：
<?php
// updates a record in the database
// do validation (shared with update logic)
$id = $_REQUEST['id'];
$eventdate = $_REQUEST['eventdate'];
$throughdate = $_REQUEST['throughdate'];
$title = $_REQUEST['title'];
$website = $_REQUEST['website'];
$email = $_REQUEST['email'];
$notes = $_REQUEST['notes'];
$venue = $_REQUEST['venue'];
$address = $_REQUEST['address'];
$city = $_REQUEST['city'];
$state = $_REQUEST['state'];
$lat = $_REQUEST['lat'];
$lon = $_REQUEST['lon'];
$accurate = $_REQUEST['accurate'];
$errorwasthrown="";
$database = 'mapcal';
// database server
$dbsvr = 'localhost';
// username
$dbuser = 'root';
// password
$dbpass = 'usbw';
function db_connect() {
global $dbsvr,$dbuser,$dbpass,$database;
static $dbcon;
if (! $dbcon) {
$dbcon = mysql_connect($dbsvr,$dbuser,$dbpass);
if (! mysql_select_db($database)) {
die("Failure connecting to database - " . mysql_error());
}
}
}
if (! $eventdate) {
adderrmsg('eventdate','Event date cannot be blank.');
$errorwasthrown=1;
}
else {
// else date wasn't blank, so validate it
if (! preg_match("/^\d\d\/\d\d\/\d\d$/",$eventdate)) {
adderrmsg('eventdate',"Event date must be in format mm/dd/yy.");
$errorwasthrown=1;
}
}
if ($throughdate && ! preg_match("/^\d\d\/\d\d\/\d\d$/",$throughdate)) {
adderrmsg('throughdate',"Through date must be in format mm/dd/yy.");
$errorwasthrown=1;
}
if (! $title) {
adderrmsg('title','Title cannot be blank.');
$errorwasthrown=1;
}
if ($errorwasthrown) {
include('dsp_editevent.php');
}
else {
db_connect();
// format the date correctly for mysql
$dateparts = split("/",$eventdate);
$eventdate = "$dateparts[2]/$dateparts[0]/$dateparts[1]";
if ($throughdate) {
$dateparts = split("/",$throughdate);
$throughdate = "$dateparts[2]/$dateparts[0]/$dateparts[1]";
$throughdate = "'" . mysql_real_escape_string($throughdate) . "'";
}
else {
$throughdate = 'NULL';
}
// format event website if necessary
if ($website && ! preg_match("/:\/\//",$website)) {
$website = "http://" . $website;
}
// update record in the database
$query = "UPDATE events SET ";
$query .= "eventdate = '" . mysql_real_escape_string($eventdate) . "', " .
"throughdate = " . $throughdate . ", " .
"title = '" . mysql_real_escape_string($title) . "', " .
"website = '" . mysql_real_escape_string($website) . "', " .
"email = '" . mysql_real_escape_string($email) . "', " .
"notes = '" . mysql_real_escape_string($notes) . "', " .
"venue = '" . mysql_real_escape_string($venue) . "', " .
"address = '" . mysql_real_escape_string($address) . "', " .
"city = '" . mysql_real_escape_string($city) . "', " .
"state = '" . mysql_real_escape_string($state) . "', " .
"lat = '" . mysql_real_escape_string($lat) . "', " .
"lon = '" . mysql_real_escape_string($lon) . "', " .
"accurate = '" . mysql_real_escape_string($accurate) . "' " .
"WHERE id = " . mysql_real_escape_string($id);
if (! mysql_query($query)) {
exit("Query failed! - $query");
}
print "<p style='color: green'>Event <b>$title</b> was updated.</p>\n";
include('dsp_listevents.php');
} // close else ! errorwasthrown
?>
什麼打印查詢後，我可以看到的是，它是沒有得到id的值，但全部來自田野形式，但爲什麼？
我可以建議移動使用準備好的語句嗎？ – 2012-04-13 16:39:23
請給我一個有用的建議來解決這個問題。 – rock 2012-04-13 16:41:31
張貼您的表格。 – j08691 2012-04-13 16:48:40