News list of PHP native development news station (2)

We completed the creation of the news data table in the last class, so today we will explain to you how to make a news list display page, then find our content management page in the background template~, and then add what we do not need and redundant code will be deleted!

Then we can start making our news list page!

Step 1: Connect to the database

<?php
// 显示所有的错误
error_reporting(E_ALL & ~E_NOTICE  );
// 连接mysql数据库
$link = mysqli_connect('localhost','root', 'root');
if (!$link) {
    echo "connect mysql error!";
    exit();
}
// 选中数据库 news为数据库的名字
$db_selected = mysqli_select_db($link, 'news');
if (!$db_selected) {
    echo "<br>selected db error!";
    exit();
}
// 设置mysql字符集 为 utf8
$link->query("set names utf8");
?>

Step 2: Query all the contents in the data table and execute the SQL statement

$sql = "select * from new where 1 "; // 查询语句
$result = mysqli_query($link, $sql);
$arr_news = mysqli_fetch_all($result, MYSQL_ASSOC);

Step 3: Now we have All the data in the data table has been obtained. Now we need to output the data in a loop, find the location where the data is to be output in the template, and then get the data!

<table class="table table-hover text-center">
    <tr>
        <th width="100" style="text-align:left; padding-left:20px;">ID</th>
        <th>分类名</th>
        <th>标题</th>
        <th>内容</th>
        <th>关键字</th>
        <th>图片</th>
        <th>作者</th>
        <th width="10%">更新时间</th>
        <th width="310">操作</th>
    </tr>
    <?php
     if($arr_news){
         foreach ($arr_news as $val){
             echo "<tr>";
             echo " <td style='text-align:left; padding-left:20px;'>
                    <input type='checkbox' name='id[]' value='' />{$val['id']}</td>";
             echo "<td>{$new_category_value[$val['category_id']]}</td>";
             echo "<td>". mb_substr($val['title'], 0,15,"utf-8")."</td>";
             echo "<td>". mb_substr($val['content'], 0,20,"utf-8")."</td>";
             echo "<td>{$val['tag']}</td>";

             if($val['pic']){
                 echo "<td ><img src='{$val['pic']}' style='width: 50px; height: 50px'></td>";
             }else{
                 echo "<td>暂无图片</td>";
             }
             echo "<td>{$val['author']}</td>";
             echo "<td>{$val['created_at']}</td>";
             ?>
             <td>
              <div class='button-group'> 
              <a class='button border-main' href='new_edit.php?id=<?php echo $val['id'];?>'>
              <span class='icon-edit'></span> 修改</a>
              <a class='button border-red' href='javascript:;' onclick='return del(<?php echo $val['id']?>)'>
              <span class='icon-trash-o'></span> 删除</a> 
              </div>
              </td>
    <?
             echo "</tr>";
         }
     }
    ?>

We use foreach here to traverse the data. Of course, there are many loop methods. You can complete the function based on what you are familiar with~

Explain: We have a category name here, and this is the content of our category! So here we not only have to query the news table, we also have to query the classification table!

<?php
$sql  = "select * from new_category ";
$result = mysqli_query($link, $sql);
$new_category = mysqli_fetch_all($result, MYSQL_ASSOC);
$new_category_value = array();
foreach($new_category as $val ){
    $new_category_value[$val['id']] = $val['name'];
}
?>

Take out the classification table and traverse the classification table!

As shown in the picture above, all the news is displayed!

Continuing Learning

new file

<?php // 显示所有的错误 error_reporting(E_ALL & ~E_NOTICE ); // 连接mysql数据库 $link = mysqli_connect('localhost','root', 'root'); if (!$link) { echo "connect mysql error!"; exit(); } // 选中数据库 news为数据库的名字 $db_selected = mysqli_select_db($link, 'news'); if (!$db_selected) { echo "<br>selected db error!"; exit(); } // 设置mysql字符集为 utf8 $link->query("set names utf8"); $sql = "select * from new where 1 "; // 查询语句 $result = mysqli_query($link, $sql); $arr_news = mysqli_fetch_all($result, MYSQL_ASSOC); //新闻分类 $sql = "select * from new_category "; $result = mysqli_query($link, $sql); $new_category = mysqli_fetch_all($result, MYSQL_ASSOC); $new_category_value = array(); foreach($new_category as $val ){ $new_category_value[$val['id']] = $val['name']; } ?> <!DOCTYPE html> <html lang="zh-cn"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" /> <meta name="renderer" content="webkit"> <title></title> <link rel="stylesheet" href="../css/pintuer.css"> <link rel="stylesheet" href="../css/admin.css"> <script src="../js/jquery.js"></script> <script src="../js/pintuer.js"></script> </head> <body> <form method="get" action="" id="listform"> <div class="panel admin-panel"> <div class="panel-head"><strong class="icon-reorder"> 内容列表</strong> <a href="" style="float:right; display:none;">添加字段</a></div> <div class="padding border-bottom"> <ul class="search" style="padding-left:10px;"> <li> <a class="button border-main icon-plus-square-o" href="news_add.php"> 添加内容</a> </li> <if condition="$iscid eq 1"> <li> <select name="category_id" class="input" style="width:200px; line-height:17px;" onchange="changesearch()"> <option value="">-请选择-</option> <?php foreach( $new_category_value as $key => $val ){ ?> <option value="<?php echo $key;?>" <?php if($_GET['category_id']==$key) echo "selected";?>><?php echo $val;?></option> <?php } ?> </select> </li> </if> <li> <input type="text" placeholder="请输入搜索关键字" name="keywords" class="input" style="width:250px; line-height:17px;display:inline-block" /> <a href="javascript:void(0)" class="button border-main icon-search" onclick="changesearch()" > 搜索</a></li> </ul> </div> <table class="table table-hover text-center"> <tr> <th width="100" style="text-align:left; padding-left:20px;">ID</th> <th>分类名</th> <th>标题</th> <th>内容</th> <th>关键字</th> <th>图片</th> <th>作者</th> <th width="10%">更新时间</th> <th width="310">操作</th> </tr> <?php if($arr_news){ foreach ($arr_news as $val){ echo "<tr>"; echo " <td style='text-align:left; padding-left:20px;'> <input type='checkbox' name='id[]' value='' />{$val['id']}</td>"; echo "<td>{$new_category_value[$val['category_id']]}</td>"; echo "<td>". mb_substr($val['title'], 0,15,"utf-8")."</td>"; echo "<td>". mb_substr($val['content'], 0,20,"utf-8")."</td>"; echo "<td>{$val['tag']}</td>"; if($val['pic']){ echo "<td ><img src='{$val['pic']}' style='width: 50px; height: 50px'></td>"; }else{ echo "<td>暂无图片</td>"; } echo "<td>{$val['author']}</td>"; echo "<td>{$val['created_at']}</td>"; ?> <td> <div class='button-group'> <a class='button border-main' href='new_edit.php?id=<?php echo $val['id'];?>'> <span class='icon-edit'></span> 修改</a> <a class='button border-red' href='javascript:;' onclick='return del(<?php echo $val['id']?>)'> <span class='icon-trash-o'></span> 删除</a> </div> </td> <? echo "</tr>"; } } ?> <tr> <td style="text-align:left; padding:19px 0;padding-left:20px;"> <input type="checkbox" id="checkall"/> 全选 </td> <td colspan="8" style="text-align:left;padding-left:20px;"> <a href="javascript:void(0)" class="button border-red icon-trash-o" style="padding:5px 15px;" onclick="DelSelect()"> 删除</a> 移动到： <select name="movecid" style="padding:5px 15px; border:1px solid #ddd;" onchange="changecate(this)"> <option value="">请选择分类</option> <option value="">产品分类</option> <option value="">产品分类</option> <option value="">产品分类</option> <option value="">产品分类</option> </select> </td> </tr> <tr> <td colspan="8"> <div class="pagelist"> <a href="new_list.php">首页</a> <?php if( $page > 1 ){ ?> <a href="new_list.php?page=<?php echo $pre_page;?>">上一页</a> <? } if( $page < $max_page ){ ?> <a href="new_list.php?page=<?php echo $next_page;?>">下一页</a> <? } ?> <a href="new_list.php?page=<?php echo $max_page;?>">末页</a> / 总页码 <font color="red"><?php echo $max_page;?></font>页当前页码 <font color="red"><?php echo $page;?></font>页 </div> </td> </tr> </table> </div> </form> <script type="text/javascript"> //搜索 function changesearch(){ } //单个删除 function del(id){ if(confirm("您确定要删除吗?")){ document.location.href = "new_delete.php?id=" + id ; } } //全选 $("#checkall").click(function(){ $("input[name='id[]']").each(function(){ if (this.checked) { this.checked = false; } else { this.checked = true; } }); }) //批量删除 function DelSelect(){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); //单个删除 if (Checkbox){ var t=confirm("您确认要删除选中的内容吗？"); if (t==false) return false; $("#listform").submit(); } else{ alert("请选择您要删除的内容!"); return false; } } //批量排序 function sorts(){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); if (Checkbox){ $("#listform").submit(); } else{ alert("请选择要操作的内容!"); return false; } } //批量首页显示 function changeishome(o){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); if (Checkbox){ $("#listform").submit(); } else{ alert("请选择要操作的内容!"); return false; } } //批量推荐 function changeisvouch(o){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); if (Checkbox){ $("#listform").submit(); } else{ alert("请选择要操作的内容!"); return false; } } //批量置顶 function changeistop(o){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); if (Checkbox){ $("#listform").submit(); } else{ alert("请选择要操作的内容!"); return false; } } //批量移动 function changecate(o){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); if (Checkbox){ $("#listform").submit(); } else{ alert("请选择要操作的内容!"); return false; } } //批量复制 function changecopy(o){ var Checkbox=false; $("input[name='id[]']").each(function(){ if (this.checked==true) { Checkbox=true; } }); if (Checkbox){ var i = 0; $("input[name='id[]']").each(function(){ if (this.checked==true) { i++; } }); if(i>1){ alert("只能选择一条信息!"); $(o).find("option:first").prop("selected","selected"); }else{ $("#listform").submit(); } } else{ alert("请选择要复制的内容!"); $(o).find("option:first").prop("selected","selected"); return false; } } </script> </body> </html>

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