文档章节

使用PHP开发HR系统(6)

o
 osc_g8254g7s
发布于 2019/08/19 23:11
字数 2486
阅读 18
收藏 0

精选30+云产品,助力企业轻松上云!>>>

   

本节讲述如何连接Postgre数据库并查询与显示数据

==================================================================================================

前几节我们搭建了环境并处理了页面的一些问题,本节我们研究如何连接真实的数据库并把数据显示在页面上。

从主页我们看到有"在职人员总数",我们就以这个数据为例来说明:

   

1、建立数据集库表

CREATE TABLE "public"."t_employee" (

"cid" varchar(255) COLLATE "default" NOT NULL,

"cname" varchar(255) COLLATE "default",

"cname_e" varchar(255) COLLATE "default",

"department_unit_code" varchar(255) COLLATE "default",

"department_unit" varchar(255) COLLATE "default",

"personnel_scope" varchar(255) COLLATE "default",

"personnel_subscope" varchar(255) COLLATE "default",

"salary_range" varchar(255) COLLATE "default",

"office" varchar(255) COLLATE "default",

"position_number" varchar(32) COLLATE "default",

"position_name" varchar(32) COLLATE "default",

"post_directory_code" varchar(255) COLLATE "default",

"post_directory_name" varchar(255) COLLATE "default",

"jobs_numbers" varchar(32) COLLATE "default",

"jobs_name" varchar(32) COLLATE "default",

"jobs_seq_name" varchar(32) COLLATE "default",

"jobs_subseq_name" varchar(32) COLLATE "default",

"jobs_second_name" varchar(32) COLLATE "default",

"post_hierarchy_name" varchar(32) COLLATE "default",

"employee_group" varchar(32) COLLATE "default",

"employee_subgroup" varchar(32) COLLATE "default",

"is_frontline" varchar(8) COLLATE "default",

"higher_position" varchar(255) COLLATE "default",

"line_manager" varchar(255) COLLATE "default",

"line_manager_id" varchar(32) COLLATE "default",

"hrbp_id" varchar(32) COLLATE "default",

"hrbp_name" varchar(255) COLLATE "default",

"nationality" varchar(32) COLLATE "default",

"male" varchar(2) COLLATE "default",

"marriage" varchar(4) COLLATE "default",

"fertility" varchar(255) COLLATE "default",

"census" varchar(255) COLLATE "default",

"census_addr" varchar(255) COLLATE "default",

"census_nature" varchar(255) COLLATE "default",

"birthdate" date,

"age" int4,

"id_cards" varchar(32) COLLATE "default",

"mobile_telephone" varchar(255) COLLATE "default",

"enterprise_email" varchar(255) COLLATE "default",

"personal_email" varchar(255) COLLATE "default",

"education" varchar(255) COLLATE "default",

"profession" varchar(255) COLLATE "default",

"institution" varchar(255) COLLATE "default",

"graduation_date" date,

"bank_account" varchar(255) COLLATE "default",

"payee" varchar(255) COLLATE "default",

"kinsfolk" varchar(32) COLLATE "default",

"kinsfolk_phone" varchar(32) COLLATE "default",

"kinsfolk_relation" varchar(32) COLLATE "default",

"date_of_appointment" date,

"state_employees" varchar(4) COLLATE "default",

"permanent_office" varchar(255) COLLATE "default",

"sources_of_recruitment" varchar(255) COLLATE "default",

"sources_of_secondary_recruitment" varchar(255) COLLATE "default",

"date_of_entry" date,

"date_of_inbloc" date,

"date_of_seniority" date,

"date_of_work" date,

"date_of_dimission" date,

"date_of_contract_start" date,

"date_of_contract_end" date,

"the_subject_of_contracts" varchar(255) COLLATE "default",

"the_count_of_contracts" varchar(255) COLLATE "default",

"is_second_work" varchar(255) COLLATE "default",

"address" varchar(255) COLLATE "default",

"is_competition_agreement" varchar(255) COLLATE "default",

"performance_manager_name" varchar(255) COLLATE "default",

"performance_manager_id" varchar(32) COLLATE "default",

"profile_photo" bytea,

"post_subhierarchy_name" varchar(32) COLLATE "default",

"pay_rank" varchar(4) COLLATE "default",

"nation" varchar(32) COLLATE "default"

)

WITH (OIDS=FALSE)

   

;

COMMENT ON COLUMN "public"."t_employee"."cid" IS '员工编号';

COMMENT ON COLUMN "public"."t_employee"."cname" IS '员工姓名';

COMMENT ON COLUMN "public"."t_employee"."cname_e" IS '员工英文名';

COMMENT ON COLUMN "public"."t_employee"."department_unit_code" IS '部门编码';

COMMENT ON COLUMN "public"."t_employee"."department_unit" IS '部门';

COMMENT ON COLUMN "public"."t_employee"."fertility" IS '生育状况';

COMMENT ON COLUMN "public"."t_employee"."census" IS '户籍所在地';

COMMENT ON COLUMN "public"."t_employee"."census_addr" IS '户籍地址';

COMMENT ON COLUMN "public"."t_employee"."census_nature" IS '户口性质';

COMMENT ON COLUMN "public"."t_employee"."education" IS '学历';

COMMENT ON COLUMN "public"."t_employee"."profession" IS '所学专业';

COMMENT ON COLUMN "public"."t_employee"."institution" IS '院校';

COMMENT ON COLUMN "public"."t_employee"."graduation_date" IS '毕业时间';

COMMENT ON COLUMN "public"."t_employee"."bank_account" IS '银行账号';

COMMENT ON COLUMN "public"."t_employee"."payee" IS '收款人';

COMMENT ON COLUMN "public"."t_employee"."date_of_dimission" IS '离职日期';

COMMENT ON COLUMN "public"."t_employee"."nation" IS '民族';

   

-- ----------------------------

-- Alter Sequences Owned By

-- ----------------------------

   

-- ----------------------------

-- Primary Key structure for table t_employee

-- ----------------------------

ALTER TABLE "public"."t_employee" ADD PRIMARY KEY ("cid");

并导入一些员工信息;

   

2、配置数据库连接

2.1 配置php.ini文件

去掉extension=php_pdo_pgsql.dll和extension=php_pgsql.dll之前的逗号

;

extension=php_bz2.dll

extension=php_curl.dll

extension=php_com_dotnet.dll

;extension=php_enchant.dll

extension=php_fileinfo.dll

extension=php_gd2.dll

extension=php_gettext.dll

extension=php_gmp.dll

extension=php_intl.dll

extension=php_imap.dll

;extension=php_interbase.dll

extension=php_ldap.dll

extension=php_mbstring.dll

extension=php_exif.dll ; Must be after mbstring as it depends on it

extension=php_mysql.dll

extension=php_mysqli.dll

;extension=php_oci8_12c.dll ; Use with Oracle Database 12c Instant Client

extension=php_openssl.dll

;extension=php_pdo_firebird.dll

extension=php_pdo_mysql.dll

extension=php_pdo.dll

extension=sqlite3.dll

extension=php_pdo_sqlite.dll

extension=php_pdo_oci.dll

extension=php_pdo_odbc.dll

extension=php_pdo_pgsql.dll

extension=php_pgsql.dll

;extension=php_shmop.dll

extension=php_sqlsrv_56_ts.dll

2.2 配置CI数据库连接参数

打开application->config->database.php文件,修改默认数据库连接参数

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

   

/*

| -------------------------------------------------------------------

| DATABASE CONNECTIVITY SETTINGS

| -------------------------------------------------------------------

| This file will contain the settings needed to access your database.

|

| For complete instructions please consult the 'Database Connection'

| page of the User Guide.

|

| -------------------------------------------------------------------

| EXPLANATION OF VARIABLES

| -------------------------------------------------------------------

|

|        ['dsn'] The full DSN string describe a connection to the database.

|        ['hostname'] The hostname of your database server.

|        ['username'] The username used to connect to the database

|        ['password'] The password used to connect to the database

|        ['database'] The name of the database you want to connect to

|        ['dbdriver'] The database driver. e.g.: mysqli.

|                        Currently supported:

|                                 cubrid, ibase, mssql, mysql, mysqli, oci8,

|                                 odbc, pdo, postgre, sqlite, sqlite3, sqlsrv

|        ['dbprefix'] You can add an optional prefix, which will be added

|                                 to the table name when using the Query Builder class

|        ['pconnect'] TRUE/FALSE - Whether to use a persistent connection

|        ['db_debug'] TRUE/FALSE - Whether database errors should be displayed.

|        ['cache_on'] TRUE/FALSE - Enables/disables query caching

|        ['cachedir'] The path to the folder where cache files should be stored

|        ['char_set'] The character set used in communicating with the database

|        ['dbcollat'] The character collation used in communicating with the database

|                                 NOTE: For MySQL and MySQLi databases, this setting is only used

|                                  as a backup if your server is running PHP < 5.2.3 or MySQL < 5.0.7

|                                 (and in table creation queries made with DB Forge).

|                                  There is an incompatibility in PHP with mysql_real_escape_string() which

|                                  can make your site vulnerable to SQL injection if you are using a

|                                  multi-byte character set and are running versions lower than these.

|                                  Sites using Latin-1 or UTF-8 database character set and collation are unaffected.

|        ['swap_pre'] A default table prefix that should be swapped with the dbprefix

|        ['encrypt'] Whether or not to use an encrypted connection.

|

|                        'mysql' (deprecated), 'sqlsrv' and 'pdo/sqlsrv' drivers accept TRUE/FALSE

|                        'mysqli' and 'pdo/mysql' drivers accept an array with the following options:

|

|                                'ssl_key' - Path to the private key file

|                                'ssl_cert' - Path to the public key certificate file

|                                'ssl_ca' - Path to the certificate authority file

|                                'ssl_capath' - Path to a directory containing trusted CA certificates in PEM format

|                                'ssl_cipher' - List of *allowed* ciphers to be used for the encryption, separated by colons (':')

|                                'ssl_verify' - TRUE/FALSE; Whether verify the server certificate or not

|

|        ['compress'] Whether or not to use client compression (MySQL only)

|        ['stricton'] TRUE/FALSE - forces 'Strict Mode' connections

|                                                        - good for ensuring strict SQL while developing

|        ['ssl_options']        Used to set various SSL options that can be used when making SSL connections.

|        ['failover'] array - A array with 0 or more data for connections if the main should fail.

|        ['save_queries'] TRUE/FALSE - Whether to "save" all executed queries.

|                                 NOTE: Disabling this will also effectively disable both

|                                 $this->db->last_query() and profiling of DB queries.

|                                 When you run a query, with this setting set to TRUE (default),

|                                 CodeIgniter will store the SQL statement for debugging purposes.

|                                 However, this may cause high memory usage, especially if you run

|                                 a lot of SQL queries ... disable this to avoid that problem.

|

| The $active_group variable lets you choose which connection group to

| make active. By default there is only one group (the 'default' group).

|

| The $query_builder variables lets you determine whether or not to load

| the query builder class.

*/

$active_group = 'default';

$query_builder = TRUE;

   

$db['default'] = array(

'dsn'        => '',

'hostname' => 'localhost',

'username' => 'username',

'password' => 'password',

'database' => 'SIM',

'dbdriver' => 'postgre',

'port'=>'5432',

'dbprefix' => '',

'pconnect' => FALSE,

'db_debug' => (ENVIRONMENT !== 'production'),

'cache_on' => FALSE,

'cachedir' => '',

'char_set' => 'utf8',

'dbcollat' => 'utf8_general_ci',

'swap_pre' => '',

'encrypt' => FALSE,

'compress' => FALSE,

'stricton' => FALSE,

'failover' => array(),

'save_queries' => TRUE

);

其中需要注意几点:

1dbdriver设置为'postgre',注意不是'postgres',为什么会是这个名字,我猜是这样:打开system\database\drivers可以看到postgre目录

这个目录下放的就是postgre数据库相关的数据库文件;

2)'port'=>'5432',注意默认是不包含这个项的,如果电脑上安装了mysql之类的数据库,可能会有问题,所以需要增加这项,笔者的电脑上

没有设置这项显示出错;

   

3、建立model文件

CI采用了MVC模式,连接数据库操作需要建立model文件。

1)在application->models文件夹下新建memployee.php文件,代码如下:

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

   

class MEmployee extends CI_Model {

   

public function __construct(){

parent::__construct();

$this->load->database();        

}

 

public function index()

{

}

   

/**

*

*

* @return

*/

public function getEmployeeNum(){

$sql = "select state_employees,count(cid) from t_employee group by state_employees";

$query = $this->db->query($sql);

//var_dump($query);

return $query->result();

}

}

通过getEmployeeNum函数,我们查询在职员工数量,并返回查询数据集;注意我们首先要在构造函数中加载数据库类:

$this->load->database();

   

4、建立control文件

由于我们是在主页中显示'在职员工总数'这个数据,因此我们修改application->controllers->Main.php文件

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

   

class Main extends CI_Controller {

   

public function __construct(){

parent::__construct();

$this->load->helper('url_helper');

$this->load->model('MEmployee');                

}

 

public function index()

{

$data['param'] = $this->MEmployee->getEmployeeNum();

$this->load->view('container',$data);

}

}

我们通过调用Memployee->getEmployeeNum()函数得到'在职员工数量',并通过数组$data传递到页面;

   

5、修改application->views->container.php文件

?php

defined('BASEPATH') OR exit('No direct script access allowed');

?>

<!DOCTYPE html>

<!--[if IE 8]> <html lang="en" class="ie8"> <![endif]-->

<!--[if IE 9]> <html lang="en" class="ie9"> <![endif]-->

<!--[if !IE]><!-->

<html lang="en"> <!--<![endif]-->

<?php $this->load->view('templates/header'); ?>

<body class="fixed-top">

<?php $this->load->view('templates/top'); ?>

<div id="container" class="row-fluid">

<?php $this->load->view('templates/menu'); ?>

<div id="main-content">

<?php $this->load->view('main',$param); ?>        

</div>        

</div>

<?php $this->load->view('templates/footer'); ?>

   

</body>

</html>

注意这句:<?php $this->load->view('main',$param); ?>,这里把参数传递到了application->views->main.php文件中;

   

6、修改application->views->main.php文件代码:

<div class="container-fluid">

<!-- BEGIN PAGE HEADER-->

<div class="row-fluid">

<div class="span12">

<!-- BEGIN PAGE TITLE & BREADCRUMB-->

<h3 class="page-title">

</h3>

<ul class="breadcrumb">

<li>

<a href="<?php echo site_url('main/index');?>">首页</a>

<span class="divider">/</span>

</li>

<li class="active">

人力资源总览

</li>

<li class="pull-right search-wrap">

<form action="search_result.html" class="hidden-phone">

<div class="input-append search-input-area">

<input class="" id="appendedInputButton" type="text">

<button class="btn" type="button"><i class="fa fa-search"></i> </button>

</div>

</form>

</li>

</ul>

<!-- END PAGE TITLE & BREADCRUMB-->

</div>

</div>

<!-- END PAGE HEADER-->

<!-- BEGIN PAGE CONTENT-->

<div class="row-fluid">

<!--BEGIN METRO STATES-->

<div class="metro-nav" id="metro-nav1">

<div class="metro-nav-block nav-block-orange">

<a data-original-title="" href="#">

<i class="fa fa-user"></i>

<div class="info"><?php echo $param[0]->count; ?></div>

<div class="status">在职人员总数</div>

</a>

</div>

<div class="metro-nav-block nav-olive">

<a data-original-title="" href="#">

<i class="fa fa-tags"></i>

<div class="info"><?php echo $param[1]->count; ?></div>

<div class="status">本年度离职人数</div>

</a>

</div>

<div class="metro-nav-block nav-block-yellow">

<a data-original-title="" href="#">

<i class="fa fa-comments-alt"></i>

<div class="info"><?php echo $param[2]->count; ?></div>

<div class="status">本年度异动人数</div>

</a>

</div>

<div class="metro-nav-block nav-block-green double">

<a data-original-title="" href="#">

<i class="fa fa-eye-open"></i>

<div class="info">288</div>

<div class="status">本月离职人数</div>

</a>

</div>

<div class="metro-nav-block nav-block-red">

<a data-original-title="" href="#">

<i class="fa fa-bar-chart"></i>

<div class="info">255</div>

<div class="status">本月待招聘人数</div>

</a>

</div>

</div>

<div class="metro-nav">

<div class="metro-nav-block nav-light-purple double">

<a data-original-title="" href="#">

<i class="fa fa-shopping-cart"></i>

<div class="info">$8979322442</div>

<div class="status">本年薪酬福利</div>

</a>

</div>

<div class="metro-nav-block nav-light-blue double">

<a data-original-title="" href="#">

<i class="fa fa-tasks"></i>

<div class="info">$37624</div>

<div class="status">本月薪酬福利</div>

</a>

</div>

</div>

<div class="space10"></div>

<!--END METRO STATES-->

</div>

   

<!-- END PAGE CONTENT-->

</div>

代码中这里引用了参数

<div class="info"><?php echo $param[0]->count; ?></div>

<div class="status">在职人员总数</div>

   

6、目前我们的工程结构如下

   

7 运行测试

运行主页如下所示;

   

   

总结:

本文通过建立数据库表,设置连接参数,并分别创建了MVC的不同对象,提取数据显示在界面上,展示了CI数据库操作

的步骤与方法;

程序调试过程中一些错误的处理办法:

1php连接postgreSQL,总是报错"Call to undefined function pg_connect()"

这是因为系统找不到dll文件造成的,一般在php.ini文件中,去掉extension=php_pdo_pgsql.dll和extension=php_pgsql.dll

之前的逗号就可以了,如果还不行,考虑pgAdmin III文件安装中是否在系统Path路径中加载了对应pgAdmin III目录;

2、在mEmployee.php文件中,我们如果使用汉字例如$sql = "select count(cid) from t_employee where

state_employees='激活'";系统有时候会报编码错误,这是因为这个文件的默认格式不对,可以按照如下方法修改

CodeLobster IDE中,选择File->Change encoding

修改编码为UTF-8即可。

   

====================================The End==========================

   

   

   

 

   

   

   

   

   

   

   

   

   

   

   

   

 

o
粉丝 0
博文 500
码字总数 0
作品 0
私信 提问
加载中
请先登录后再评论。

暂无文章

Fetch方法封装、业务实践

  说Fetch之前啊,我们不得不说一说Ajax了,以前使用最多的自然是jQuery封装的Ajax方法了,强大而且好用。   有人说了,jQuery的Ajax都已经封装得那么好了,你还整Fetch干什么,这不是多...

osc_8nnvoyb1
21分钟前
14
0
在 Visual Studio 市场中发布项目扩展

  比较不错的开源项目中,尤其是类似于AbpNext这种级别的项目,我们都想要快速的尝试,如何提供快速给开发者提供模板是我们的一大难题。不过在VisualStudio中并没有这么难。 一.本地发布插...

osc_1wo6kipk
22分钟前
7
0
5000+字硬核干货!Redis 分布式集群部署实战

原理: Redis集群采用一致性哈希槽的方式将集群中每个主节点都分配一定的哈希槽,对写入的数据进行哈希后分配到某个主节点进行存储。 集群使用公式(CRC16 key)& 16384计算键key数据那个槽。...

osc_2jegjdnw
23分钟前
12
0
Jmeter(十四) - 从入门到精通 - JMeter定时器 - 下篇(详解教程)

1.简介   用户实际操作时,并非是连续点击,而是存在很多停顿的情况,例如:用户需要时间阅读文字内容、填表、或者查找正确的链接等。为了模拟用户实际情况,在性能测试中我们需要考虑思考...

osc_yy65eb2q
25分钟前
0
0
Redis 6.0 访问控制列表ACL说明

背景 在Redis6.0之前的版本中,登陆Redis Server只需要输入密码(前提配置了密码 requirepass )即可,不需要输入用户名,而且密码也是明文配置到配置文件中,安全性不高。并且应用连接也使用...

osc_zwv9uj8l
26分钟前
6
0

没有更多内容

加载失败,请刷新页面

加载更多

返回顶部
顶部