当我搜索数据库中不存在的内容时，我收到语法错误。
错误是，“您的SQL语法中有错误;请查看与您的MySQL服务器版本对应的手册，以便在第8行的'-1,1'附近使用正确的语法”
我用来搜索数据库的表单是：
<form name="search" method="post" action="page.php">
<table width="450px">
<tr>
<td valign="top">
<label for="first_name">First Name:</label>
</td>
<td valign="top">
<input type="text" name="find" maxlength="50" size="30">
</td>
</tr>
<tr>
<td valign="top"">
<label for="last_name">Last Name:</label>
</td>
<td valign="top">
<input type="text" name="f" maxlength="50" size="30">
</td>
</tr>
<tr>
<td valign="top">
<label for="comments">Select your State:</label>
</td>
<td valign="top">
<select name="state" id="state">
<option value=""></option>
<option value="Alabama">Alabama</option>
<option value="Alaska">Alaska</option>
<option value="Arizona">Arizona</option>
<option value="Arkansas">Arkansas</option>
<option value="California">California</option>
<option value="Colorado">Colorado</option>
<option value="Connecticut">Connecticut</option>
<option value="Delaware">Delaware</option>
<option value="Florida">Florida</option>
<option value="Georgia">Georgia</option>
<option value="Hawaii">Hawaii</option>
<option value="Idaho">Idaho</option>
<option value="Illinois">Illinois</option>
<option value="Indiana">Indiana</option>
<option value="Iowa">Iowa</option>
<option value="Kansas">Kansas</option>
<option value="Kentucky">Kentucky</option>
<option value="Louisiana">Louisiana</option>
<option value="Maine">Maine</option>
<option value="Maryland">Maryland</option>
<option value="Massachusetts">Massachusetts</option>
<option value="Michigan">Michigan</option>
<option value="Minnesota">Minnesota</option>
<option value="Mississippi">Mississippi</option>
<option value="Missouri">Missouri</option>
<option value="Montana">Montana</option>
<option value="Nebraska">Nebraska</option>
<option value="Nevada">Nevada</option>
<option value="New Hampshire">New Hampshire</option>
<option value="New Jersey">New Jersey</option>
<option value="New Mexico">New Mexico</option>
<option value="New York">New York</option>
<option value="North Carolina">North Carolina</option>
<option value="North Dakota">North Dakota</option>
<option value="Ohio">Ohio</option>
<option value="Oklahoma">Oklahoma</option>
<option value="Oregon">Oregon</option>
<option value="Pennsylvania">Pennsylvania</option>
<option value="Rhode Island">Rhode Island</option>
<option value="South Carolina">South Carolina</option>
<option value="South Dakota">South Dakota</option>
<option value="Tennessee">Tennessee</option>
<option value="Texas">Texas</option>
<option value="Utah">Utah</option>
<option value="Vermont">Vermont</option>
<option value="Virginia">Virginia</option>
<option value="Washington">Washington</option>
<option value="West Virginia">West Virginia</option>
<option value="Wisconsin">Wisconsin</option>
<option value="Wyoming">Wyoming</option>
</select>
</td>
</tr>
<tr>
<td valign="top">
<label for="comments">Zip Code:</label>
</td>
<td valign="top">
<input type="text" name="zip" maxlength="30" size="30">
</td>
</tr>
<tr>
<td valign="top">
<label for="email">Email Address:</label>
</td>
<td valign="top">
<input type="text" name="email" maxlength="80" size="30">
</td>
</tr>
<tr>
<td valign="top">
<label for="telephone">Phone Number:</label>
</td>
<td valign="top">
<input type="text" name="info" maxlength="30" size="30">
</td>
</tr>
<tr>
<td colspan="2" style="text-align:center">
<input type="hidden" name="searching" value="yes" />
<input type="submit" name="search" value="Search" />
</td>
</tr>
</table>
</form>
我使用的分页脚本是：
<?php
// Connects to your Database
mysql_connect("xxxxxxx", "xxxxxxx", "xxxxx") or die(mysql_error());
mysql_select_db("xxx") or die(mysql_error());
error_reporting(0);
//This checks to see if there is a page number. If not, it will set it to page 1
if (!(isset($pagenum)))
{
$pagenum = 1;
}
//Here we count the number of results
//Edit $data to be your query
$data = mysql_query("SELECT * FROM form_again WHERE field_1
LIKE '%" . mysql_real_escape_string($find) . "%' AND field_2
LIKE '%" . mysql_real_escape_string($f) . "%' AND field_3
LIKE '%" . mysql_real_escape_string($info) . "%' AND field_7
LIKE '%" . mysql_real_escape_string($zip) . "%' AND field_5
LIKE '%" . mysql_real_escape_string($state) . "%' AND field_6
LIKE '%" . mysql_real_escape_string($city) . "%' AND field_9
LIKE '%" . mysql_real_escape_string($email) . "%'") or die(mysql_error());
$rows = mysql_num_rows($data);
//This is the number of results displayed per page
$page_rows = 1;
//This tells us the page number of our last page
$last = ceil($rows/$page_rows);
//this makes sure the page number isn't below one, or more than our maximum pages
if ($pagenum < 1)
{
$pagenum = 1;
}
elseif ($pagenum > $last)
{
$pagenum = $last;
}
//This sets the range to display in our query
$max = 'limit ' .($pagenum - 1) * $page_rows .',' .$page_rows;
//This is your query again, the same one... the only difference is we add $max into it
$data_p = mysql_query("SELECT * FROM form_again WHERE field_1
LIKE '%" . mysql_real_escape_string($find) . "%' AND field_2
LIKE '%" . mysql_real_escape_string($f) . "%' AND field_3
LIKE '%" . mysql_real_escape_string($info) . "%' AND field_7
LIKE '%" . mysql_real_escape_string($zip) . "%' AND field_5
LIKE '%" . mysql_real_escape_string($state) . "%' AND field_6
LIKE '%" . mysql_real_escape_string($city) . "%' AND field_9
LIKE '%" . mysql_real_escape_string($email) . "%' $max") or die(mysql_error());
//This is where you display your query results
while($info = mysql_fetch_array( $data_p ))
{
echo "<hr><br>First Name: ";
echo $info['field_1'];
echo "<br>Last Name: ";
echo $info['field_2'];
echo "<br>Home Phone: ";
echo $info['field_3'];
echo "<br>Cell Phone: ";
echo $info['field_4'];
echo "<br>City: ";
echo $info['field_6'];
echo "<br>State: ";
echo $info['field_5'];
echo "<br>Zip: ";
echo $info['field_7'];
echo "<br>Email: ";
echo $info['field_9'];
echo "<br><hr>";
}
// This shows the user what page they are on, and the total number of pages
echo " --Page $pagenum of $last-- <p>";
// First we check if we are on page one. If we are then we don't need a link to the previous page or the first page so we do nothing. If we aren't then we generate links to the first page, and to the previous page.
if ($pagenum == 1)
{
}
else
{
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=1'> <<-First</a> ";
echo " ";
$previous = $pagenum-1;
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$previous'> <-Previous</a> ";
}
//just a spacer
echo " ---- ";
//This does the same as above, only checking if we are on the last page, and then generating the Next and Last links
if ($pagenum == $last)
{
}
else {
$next = $pagenum+1;
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$next'>Next -></a> ";
echo " ";
echo " <a href='{$_SERVER['PHP_SELF']}?pagenum=$last'>Last ->></a> ";
}
?>
<?php
//This counts the number or results - and if there wasn't any it gives them a little message explaining that
$anymatches=mysql_num_rows($data_p);
if ($anymatches == 0)
{
echo "Sorry, but we can not find an entry to match your query<br><br>";
}
//And we remind them what they searched for
echo "<b>Searched For:
</b> " .$find;
?>
答案 0 :(得分：1)
$max = 'limit ' .($pagenum - 1) * $page_rows .',' .$page_rows;
这是-1, 1出现的部分。语法错误是mysql在这里需要一个正数。
如果$rows = mysql_num_rows($data);为零，$last为零且$pagenum也为零。然后，当您从1中减去$pagenum时，您的查询中会显示-1。
可能的解决方法是从以下方式交换此条件：
if ($pagenum < 1) {
$pagenum = 1;
} elseif ($pagenum > $last) {
$pagenum = $last;
}
为：
if ($pagenum > $last) {
$pagenum = $last;
}
if ($pagenum < 1) {
$pagenum = 1;
}
答案 1 :(得分：0)
在您的代码中修改此内容：
//This sets the range to display in our query
$max = 'limit ' .((($pagenum == 0) ? 1 : $pagenum) - 1) * $page_rows .',' .$page_rows;
我认为这将解决您的问题