Php 为每个ISSET计算SQL查询?
大家好,我有点不知所措,我需要你们的帮助。我想更改每个$\u GET参数的SQL查询。我用这个:Php 为每个ISSET计算SQL查询?,php,mysql,post,pagination,get,Php,Mysql,Post,Pagination,Get,大家好,我有点不知所措,我需要你们的帮助。我想更改每个$\u GET参数的SQL查询。我用这个: <? if (isset($_GET['page']) ) { $pageno = $_GET['page']; } else { $pageno = 1; } // if $query = mysql_query("SELECT count(id) FROM m3_music_mp3"); $query_data = mysql_fetch_row($query); $numro
<?
if (isset($_GET['page']) ) {
$pageno = $_GET['page'];
} else {
$pageno = 1;
} // if
$query = mysql_query("SELECT count(id) FROM m3_music_mp3");
$query_data = mysql_fetch_row($query);
$numrows = $query_data[0];
$rows_per_page = 30;
$lastpage = ceil($numrows/$rows_per_page);
$pageno = (int)$pageno;
if ($pageno > $lastpage) {
$pageno = $lastpage;
} // if
if ($pageno < 1) {
$pageno = 1;
} // if
$limit = 'ORDER BY id DESC LIMIT ' .($pageno - 1) * $rows_per_page .',' .$rows_per_page;
$query = mysql_query("SELECT * FROM m3_music_mp3 $limit");
?>
类似于但不起作用。非常感谢。对不起,我的英语很差,php知识也很差,应该是:
if(isset($_GET['word'])) {
$word = mysql_real_escape_string($_GET['word']);
$limit = " WHERE title LIKE '%$word%' ORDER BY id DESC LIMIT " .($pageno - 1) * $rows_per_page .',' .$rows_per_page;
}
else
{
$limit = " ORDER BY id DESC LIMIT " .($pageno - 1) * $rows_per_page .',' .$rows_per_page;
}
$query = mysql_query("SELECT * FROM m3_music_mp3 $limit") or die(mysql_error());
您的解决方案应该可以正常工作,也许您只需要在WHERE之前留出一个空间,例如。。。打印出最终的查询字符串,看看哪里出错。基本上sAc是正确的。但是你可以减少你的代码。原因限制不是可选的,这可以正常工作: 编辑将代码位更改为可复制和可测试
<?
if (isset($_GET['page']) ) {
$pageno = $_GET['page'];
} else {
$pageno = 1;
} // if
$limit = "";
if(isset($_GET['word'])) {
$word = mysql_real_escape_string($_GET['word']);
$limit = " WHERE title LIKE '%$word%'"
}
$query = mysql_query("SELECT count(id) FROM m3_music_mp3" . $limit);
$query_data = mysql_fetch_row($query);
$numrows = $query_data[0];
$rows_per_page = 30;
$lastpage = ceil($numrows/$rows_per_page);
$pageno = (int)$pageno;
if ($pageno > $lastpage) {
$pageno = $lastpage;
} // if
if ($pageno < 1) {
$pageno = 1;
} // if
$limit .= ' ORDER BY id DESC LIMIT ' .($pageno - 1) * $rows_per_page .',' .$rows_per_page;
$query = mysql_query("SELECT * FROM m3_music_mp3 $limit");
?>
谢谢你的评论。它很好用。但是我怎样才能增加美元呢?使用elseif是不是应该有用?好的。这也行得通。非常感谢。但是现在分页无法正常工作分页仍然可以处理所有数据,而不是多少标题行:设置isset字位并将其放在$query=mysql\u querySELECT countid FROM m3\u music\u mp3之前;change$query=mysql\u query从m3\u music\u mp3中选择countid;to$query=mysql\u query从m3\u music\u mp3中选择countid$限度
<?
if (isset($_GET['page']) ) {
$pageno = $_GET['page'];
} else {
$pageno = 1;
} // if
$limit = "";
if(isset($_GET['word'])) {
$word = mysql_real_escape_string($_GET['word']);
$limit = " WHERE title LIKE '%$word%'"
}
$query = mysql_query("SELECT count(id) FROM m3_music_mp3" . $limit);
$query_data = mysql_fetch_row($query);
$numrows = $query_data[0];
$rows_per_page = 30;
$lastpage = ceil($numrows/$rows_per_page);
$pageno = (int)$pageno;
if ($pageno > $lastpage) {
$pageno = $lastpage;
} // if
if ($pageno < 1) {
$pageno = 1;
} // if
$limit .= ' ORDER BY id DESC LIMIT ' .($pageno - 1) * $rows_per_page .',' .$rows_per_page;
$query = mysql_query("SELECT * FROM m3_music_mp3 $limit");
?>