mysqli的简单工具包

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mb5fed6f751964c 2018-03-12 14:02:00

文章标签 php课程 mysql 数据库数据库连接微信 文章分类 MySQL 数据库

mysqli的简单工具包

1 <?php
  2 /**
  3  * 连接
  4  * @param string $host
  5  * @param string $user
  6  * @param string $password
  7  * @param string $charset
  8  * @param string $database
  9  * @return object 连接标识符
 10  */
 11 function connect1($host,$user,$password,$charset,$database) {
 12     $link = mysqli_connect ( $host, $user, $password ) or die ( '数据库连接失败<br/>ERROR ' . mysqli_connect_errno () . ':' . mysqli_connect_error () );
 13     mysqli_set_charset ( $link, $charset );
 14     mysqli_select_db ( $link, $database ) or die ( '指定数据库打开失败<br/>ERROR ' . mysqli_errno ( $link ) . ':' . mysqli_error ( $link ) );
 15     return $link;
 16 }
 17 /**
 18  * 连接 需要传递数组
 19  * @param array $config
 20  * @return object
 21  */
 22 function connect2($config) {
 23     $link = mysqli_connect ( $config ['host'], $config ['user'], $config ['password'] ) or die ( '数据库连接失败<br/>ERROR ' . mysqli_connect_errno () . ':' . mysqli_connect_error () );
 24     mysqli_set_charset ( $link, $config ['charset'] );
 25     mysqli_select_db ( $link, $config ['dbName'] ) or die ( '指定数据库打开失败<br/>ERROR ' . mysqli_errno ( $link ) . ':' . mysqli_error ( $link ) );
 26     return $link;
 27 }
 28 /**
 29  * 用常量的形式建立连接
 30  * @return unknown
 31  */
 32 function connect3(){
 33     $link = mysqli_connect ( DB_HOST, DB_USER, DB_PWD ) or die ( '数据库连接失败<br/>ERROR ' . mysqli_connect_errno () . ':' . mysqli_connect_error () );
 34     mysqli_set_charset ( $link, DB_CHARSET );
 35     mysqli_select_db ( $link, DB_DBNAME ) or die ( '指定数据库打开失败<br/>ERROR ' . mysqli_errno ( $link ) . ':' . mysqli_error ( $link ) );
 36     return $link;
 37 }
 38 
 39 /*
 40  array(
 41  'username'=>'king',
 42  'password'=>'king',
 43  'age'=>'12',
 44  'regTime'=>'123123123'
 45  );
 46  INSERT user(username,password,age,regTime) VALUES('king','king','12','123123123');
 47  */
 48 /**
 49  * 插入操作
 50  * @param object $link
 51  * @param array $data
 52  * @param string $table
 53  * @return boolean
 54  */
 55 function insert($link,$data,$table){
 56     $keys = join ( ',', array_keys ( $data ) );
 57     $vals = "'" . join ( "','", array_values ( $data ) ) . "'";
 58     $query = "INSERT {$table}({$keys}) VALUES({$vals})";
 59     $res = mysqli_query ( $link, $query );
 60     if ($res) {
 61         return mysqli_insert_id ( $link );
 62     } else {
 63         return false;
 64     }
 65 }
 66 
 67 /*
 68  array(
 69          'username'=>'king123',
 70          'password'=>'king123',
 71          'age'=>'32',
 72          'regTime'=>'123123123'
 73  );
 74  UPDATE user SET username='king123',password='king123',age='32',regTime='123123123' WHERE id=1
 75 */
 76 /**
 77  * 更新操作
 78  * @param object $link
 79  * @param array $data
 80  * @param string $table
 81  * @param string $where
 82  * @return boolean
 83  */
 84 function update($link, $data, $table, $where = null) {
 85     foreach ( $data as $key => $val ) {
 86         $set .= "{$key}='{$val}',";
 87     }
 88     $set = trim ( $set, ',' );
 89     $where = $where == null ? '' : ' WHERE ' . $where;
 90     $query = "UPDATE {$table} SET {$set} {$where}";
 91     $res = mysqli_query ( $link, $query );
 92     if ($res) {
 93         return mysqli_affected_rows ( $link );
 94     } else {
 95         return false;
 96     }
 97 }
 98 
 99 //DELETE FROM user WHERE id=
100 /**
101  * 删除操作
102  * @param object $link
103  * @param string $table
104  * @param string $where
105  * @return boolean
106  */
107 function delete($link, $table, $where = null) {
108     $where = $where ? ' WHERE ' . $where : '';
109     $query = "DELETE FROM {$table} {$where}";
110     $res = mysqli_query ( $link, $query );
111     if ($res) {
112         return mysqli_affected_rows ( $link );
113     } else {
114         return false;
115     }
116 }
117 
118 /**
119  * 查询指定记录
120  * @param object $link
121  * @param string $query
122  * @param string $result_type
123  * @return array|boolean
124  */
125 function fetchOne($link, $query, $result_type = MYSQLI_ASSOC) {
126     $result = mysqli_query ( $link, $query );
127     if ($result && mysqli_num_rows ( $result ) > 0) {
128         $row = mysqli_fetch_array ( $result, $result_type );
129         return $row;
130     } else {
131         return false;
132     }
133 }
134 
135 /**
136  * 查询所有记录
137  * @param object $link
138  * @param string $query
139  * @param string $result_type
140  * @return array|boolean
141  */
142 function fetchAll($link, $query, $result_type = MYSQLI_ASSOC) {
143     $result = mysqli_query ( $link, $query );
144     if ($result && mysqli_num_rows ( $result ) > 0) {
145         while ( $row = mysqli_fetch_array ( $result, $result_type ) ) {
146             $rows [] = $row;
147         }
148         return $rows;
149     } else {
150         return false;
151     }
152 }
153 
154 /**
155  * 得到表中的记录数
156  * @param object $link
157  * @param string $table
158  * @return number|boolean
159  */
160 function getTotalRows($link, $table) {
161     $query = "SELECT COUNT(*) AS totalRows FROM {$table}";
162     $result = mysqli_query ( $link, $query );
163     if ($result && mysqli_num_rows ( $result ) == 1) {
164         $row = mysqli_fetch_assoc ( $result );
165         return $row ['totalRows'];
166     } else {
167         return false;
168     }
169 }
170 
171 /**
172  * 得到结果集的记录条数
173  * @param object $link
174  * @param string $query
175  * @return boolean
176  */
177 function getResultRows($link, $query) {
178     $result = mysqli_query ( $link, $query );
179     if ($result) {
180         return mysqli_num_rows ( $result );
181     } else {
182         return false;
183     }
184 }
185 
186 
187 
188 /**
189  * @param object $link
190  */
191 function getServerInfo($link) {
192     return mysqli_get_server_info ( $link );
193 }
194 /**
195  * @param object $link
196  */
197 function getClientInfo($link) {
198     return mysqli_get_client_info ( $link );
199 }
200 
201 /**
202  * @param object $link
203  */
204 function getHostInfo($link){
205     return mysqli_get_host_info($link);
206 }
207 
208 /**
209  * @param object $link
210  */
211 function getProtoInfo($link) {
212     return mysqli_get_proto_info ( $link );
213 }

1 <?php
 2 $config = array(
 3     'host'=>'localhost',
 4     'user'=>'root',
 5     'password'=>'root',
 6     'charset'=>'utf8',
 7     'dbName'=>'51zxw'
 8 );
 9 
10 
11 define('DB_HOST','localhost');
12 define('DB_USER','root');
13 define('DB_PWD','root');
14 define('DB_CHARSET','utf8');
15 define('DB_DBNAME','51zxw');