小编Ric*_*378的帖子

警告：mysqli_query()：无法获取 mysqli

我是 PHP 的新手，不熟悉它的许多规则，所以这可能是一个愚蠢的问题。

我有一个将顶级类别和子类别合并到一个表中的数据库。我想首先打印出所有顶级类别，然后打印出与该类别相关联的子类别。

这是我的代码：

<?php
session_start();

include_once "/mysqli_connect.php";

$categories0 = mysqli_query($conn, "SELECT * FROM categories WHERE type = 'category'");


mysqli_close($conn);
?>

<html>
<head>
<meta charset="UTF-8" />
</head>
<body>

<div id="wrap" class="animate">

<?php 

while ($categories = mysqli_fetch_array($categories0, MYSQLI_ASSOC)) {

    $catecory_name = $categories['category'];
    echo '
    <div class="content">
    <div class="content_container no_padding">
    <div class="content_container header">
    <p>'.$categories['category'].'</p>
    </div>
    ';

    $subcategories0 = mysqli_query($conn, "SELECT * FROM categories WHERE type = 'subcategory'");

    while ($subcategories = mysqli_fetch_array($subcategories0, MYSQLI_ASSOC)) {
        echo $subcategories['category'];
    //mysqli_free_result($subcategories0);
    }

    echo '
    </div>
    </div> …

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php mysql mysqli

Ric*_*378

2015 07-04

4
推荐指数

1
解决办法

5万
查看次数

rhc setup和openshift的问题

这是我第一次尝试openhift或类似的服务而且我遇到了问题rhc setup.

我根据这里的文档安装了Ruby,Git和rhc ,但是当我rhc setup在命令提示符下运行命令时,我收到以下错误:

C:\Users\Richie>rhc setup
C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
: cannot load such file -- dl/import (LoadError)
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/net-ssh-2.9.2/lib/net/ssh/au
thentication/pageant.rb:1:in `<top (required)>'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/net-ssh-2.9.2/lib/net/ssh/au
thentication/agent/socket.rb:5:in `<top (required)>'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/net-ssh-2.9.2/lib/net/ssh/au
thentication/agent.rb:22:in `<top (required)>'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/net-ssh-2.9.2/lib/net/ssh/au
thentication/key_manager.rb:4:in `<top (required)>'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from C:/Ruby22-x64/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
:in `require'
        from …

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windows git openshift openshift-client-tools

Ric*_*378

lucky-day

3
推荐指数

1
解决办法

5059
查看次数