此处的完整代码

Question

我有一个链接到我可以过滤的MySQL查询的分页脚本。当结果未被过滤并且所有行都被显示时，我有一个下一个链接，表示“？pg = 2”等等（取决于有多少结果等）。一旦我过滤了我想要显示的内容，我的网址就会包含其他参数，例如？certifications = VALUE＆amp; state = VALUE。

这些行处理我的分页链接。

echo "<a href='?pg=".($pg-1)."' class='paginationButton'>PREVIOUS</a> \n";

echo "<a href='?pg=".($pg+1)."' class='paginationButton'>NEXT</a> \n";

我为每个人添加了$ _SERVER ['QUERY_STRING']以尝试将url参数添加到链接中。它工作但它每次点击时都会添加？pg参数（基本上如果点击两次它会这样做吗？认证= VALUE＆amp; state = VALUE＆amp; pg = 3＆amp; pg = 2.

如果已经设置＆amp; pg，我怎样才能将其设置为不在URL中复制？

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此处的完整代码

$start=0;
$limit=3;

if(isset($_GET['pg']))
{
$pg=$_GET['pg'];
$start=($pg-1)*$limit;
}
else { 
$pg = 1;
}
$sql = mysql_query($query);

$conditions = "SELECT * FROM pilotOperators WHERE 1=1";
# append condition for signage (if required)
if(isset($_GET['signage'])) {
 $conditions .= " AND signage='1'";
}
 # append condition for certifications (if required)
  if(isset($_GET['certifications'])) {
   $certifications = mysqli_real_escape_string($conn,$_GET['certifications']);
   $conditions .= " AND certifications='$certifications'";
}
# append condition for state (if required)
if(isset($_GET['state'])) {
 if($_GET['state'] != "Select State") {
   $state = mysqli_real_escape_string($conn,$_GET['state']);
   $conditions .= " AND state='$state'";
}
}
$conditions .= " Limit $start, $limit";
$result = mysqli_query($conn, $conditions);

while($row = mysqli_fetch_array($result))
{
echo "\n <table border='0' class='resultTable' width='75%'> \n";
echo "<tr> \n";
echo "<td width='120px'>ID: </td> \n";
echo "<td>" . $row['id'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Name: </td> \n";
echo "<td>" . $row['name'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Phone: </td> \n";
echo "<td>" . $row['phone'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Alt. Phone: </td> \n";
echo "<td>" . $row['alt_phone'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Fax: </td> \n";
echo "<td>" . $row['fax'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Email: </td> \n";
echo "<td>" . $row['email'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Website: </td> \n";
echo "<td><a href='" . $row['website'] . "' target='_blank'>" . $row['website'] . "</a></td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>City: </td> \n";
echo "<td>" . $row['city'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>State: </td> \n";
echo "<td>" . $row['state'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Certifications: </td> \n";
echo "<td>" . $row['certifications'] . "</td> \n";
echo "</tr> \n";
echo "<tr> \n";
echo "<td>Top Sign: </td> \n";
echo "<td>";
if($row['signage'] = 1) {
 echo "Has Top Sign";
}
else {
 echo "Top Sign Not Listed";
}
echo "</td> \n";
echo "</tr> \n";
echo "</table> \n\n";
}

$countconditions = "SELECT * FROM pilotOperators WHERE 1=1";
# append condition for signage (if required)
if(isset($_GET['signage'])) {
   $countconditions .= " AND signage='1'";
}
# append condition for certifications (if required)
if(isset($_GET['certifications'])) {
   $certifications = mysqli_real_escape_string($conn,$_GET['certifications']);
   $countconditions .= " AND certifications='$certifications'";
 }
# append condition for state (if required)
if(isset($_GET['state'])) {
 if($_GET['state'] != "Select State") {
   $state = mysqli_real_escape_string($conn,$_GET['state']);
   $countconditions .= " AND state='$state'";
}
}
$rows = mysqli_num_rows(mysqli_query($conn, $countconditions));

$total=ceil($rows/$limit);
echo "<div id='paginationLinks'> \n";
if($pg>1)
{
echo "<a href='?pg=".($pg-1)."&".$_SERVER['QUERY_STRING']."' class='paginationButton'>PREVIOUS</a> \n";
}
if($pg!=$total)
{
echo "<a href='?pg=".($pg+1)."&".$_SERVER['QUERY_STRING']."' class='paginationButton'>NEXT</a> \n";
}

echo "<ul class='page'> \n";
for($i=1;$i<=$total;$i++)
{
if($i==$pg) { echo "<li class='current'>".$i."</li> \n"; }

else { echo "<li><a href='?id=".$i."'>".$i."</a></li> \n"; }
}
echo "</ul> \n";
echo "</div> \n";
mysqli_close($con);

Answer 1

$q = http_build_query(array_merge($_GET, ["pg" => $pg+1]));

<a href="?$q">..</a>

Answer 2

尝试替换你的：

href='?pg=".($pg+1)."&".$_SERVER['QUERY_STRING']."'

有类似的东西：

$allParams = $_GET;
$allParams['pg'] = $pg+1;
$queryString = '?';
foreach ($allParams as $param=>$param_val) {
    if ($queryString != '?') $queryString .= '&';
    $queryString .= $param.'='.urlencode($param_val);
}
...
echo "<a href='$queryString' class=...

Answer 3

您可以从查询字符串中删除pg，然后再次替换它。如果它不在那里，你不会删除它，但仍然替换它。

preg_replace('/(^|&)pg=[0-9]+&/','\1',$_SERVER['QUERY_STRING'].'&').'pg='.($pg+1)

这是做什么的：

坚持＆amp;在查询字符串结尾 - 我们需要它。
在字符串开头或＆amp;
删除pg = ###
在查询字符串的末尾加上pg = $ pg + 1。

为什么要检查＆amp;之前和之后？我不想意外地替换像'apg = 54'

获取所有URL参数除了一个

此处的完整代码

3 个答案: