A simple ORM class
- WBOYOriginal
- 2016-12-01 00:00:211426browse
I wrote a simple ORM class myself to provide some ideas for interested friends.
I wrote a simple ORM class by myself to provide some ideas for interested friends. I borrowed a little bit of TP’s ideas. <?php<br />
/**<br />
* author: NickBai<br />
*createTime: 2016/11/28 0028 4:00 pm<br />
*/<br />
class MyOrm implements ArrayAccess<br />
{<br />
Public $host = '127.0.0.1'; //Database address<br />
Public $dbname = 'test'; //Database name<br />
Public $user = 'root'; //Database user name<br />
Public $pwd = 'root'; //Database password<br />
Public $port = '3306'; //Database port<br />
Public $charset = 'utf8'; //Database encoding<br />
Private $ conn = null; // Database link resources <br />
Private $alias = []; //Record global statement parameters<br />
private $sql; // Store the last sql<br />
<br />
Public function __construct()<br />
{<br />
if(
<br />
$dsn = "mysql:host=$this->host;dbname=$this->dbname;charset=$this->charset;port=$this->port";<br>
$this->conn = new PDO( $dsn, $this->user, $this->pwd);<br>
}<br>
}<br>
<br>
//Field statement<br>
Public function field($field)<br>
{<br>
If (! Is_string ($ field)) {<br>
throw new exception("The parameters of the field statement must be strings");<br>
}<br>
<br>
$this->alias['field'] = $field;<br>
Return $ this; <br>
}<br>
<br>
//table statement<br>
Public function table($table)<br>
{<br>
if(
throw new exception("The parameters of the table statement must be strings");<br>
}<br>
<br>
$this->alias['table'] = $table;<br>
Return $ this; <br>
}<br>
<br>
//where statement<br>
Public function where($where)<br>
{<br>
$this->alias['where'] = '';<br>
if(is_array($where)){<br>
<br>
foreach( $where as $key=>$vo ){<br>
$this->alias['where'] .= " `$key`" . ' = ' . $vo . ' and ';<br>
}<br>
$this->alias['where'] = rtrim( $this->alias['where'], 'and ' );<br>
<br>
}else if( is_string( $where )){<br>
<br>
$this->alias['where'] = $where;<br>
}else{<br>
<br>throw new exception("The parameters of the where statement must be an array or a string");<br>
}<br>
<br>
Return $ this; <br>
}<br>
<br>
//limit statement<br>
Public function limit($limit)<br>
{<br>
$this->alias['limit'] = '';<br>
if(
$this->alias['limit'] = '0,' . $limit;<br>
}else if( is_string( $limit )){<br>
$this->alias['limit'] = $limit;<br>
}else{<br>
throw new exception("The parameters of the limit statement must be numbers or strings");<br>
}<br>
<br>
Return $ this; <br>
}<br>
<br>
//Order statement<br>
Public function order( $order)<br>
{<br>
if(
throw new exception("The parameters of the order statement must be strings");<br>
}<br>
<br>
$this->alias['order'] = $order;<br>
Return $ this; <br>
}<br>
<br>
//group statement<br>
Public function group($group)<br>
{<br>
If (! Is_string ($ Group)) {<br>
throw new exception("The parameter of the group statement must be a string");<br>
}<br>
<br>
$this->alias['group'] = $group;<br>
Return $ this; <br>
}<br>
<br>
//Parse query sql statement<br>
Public function ParseSelectSql()<br>
{<br>
$this->sql = 'select *';<br>
If( !empty( $this->alias['field'] ) ){<br>
$this->sql = str_replace( '*', $this->alias['field'], $this->sql );<br>
}<br>
<br>
If (Empty ($ this- & gt; alias ['table'])) {<br>
throw new exception("Please use the table clause to set the query table");<br>
}else{<br>
<br>
$this->sql .= ' from ' . $this->alias['table'];<br>
}<br>
<br>
If( !empty( $this->alias['where'] ) ){<br>
$this->sql .= ' where ' . $this->alias['where'];<br>
}<br>
<br>
If( !empty( $this->alias['group'] ) ){<br>
$this->sql .= ' group by ' . $this->alias['group'];<br> }<br>
<br>
if( !empty( $this->alias['order'] ) ){<br>
$this->sql .= ' order by ' . $this->alias['order'];<br>
}<br>
<br>
if( !empty( $this->alias['limit'] ) ){<br>
$this->sql .= ' limit ' . $this->alias['limit'];<br>
}<br>
<br>
}<br>
<br>
//解析添加sql语句<br>
public function ParseAddSql()<br>
{<br>
$this->sql = 'insert into ';<br>
if( empty( $this->alias['table'] ) ){<br>
throw new exception("请用table子句设置添加表");<br>
}else{<br>
<br>
$this->sql .= $this->alias['table'] . ' set ';<br>
}<br>
<br>
return $this->sql;<br>
}<br>
<br>
//解析更新sql语句<br>
public function ParseUpdateSql()<br>
{<br>
$this->sql = 'update ';<br>
if( empty( $this->alias['table'] ) ){<br>
throw new exception("请用table子句设置修改表");<br>
}else{<br>
<br>
$this->sql .= $this->alias['table'] . ' set ';<br>
}<br>
<br>
if( empty( $this->alias['where'] ) ){<br>
throw new exception("更新语句必须有where子句指定条件");<br>
}<br>
<br>
return $this->sql;<br>
}<br>
<br>
//解析删除sql语句<br>
public function ParseDeleteSql()<br>
{<br>
$this->sql = 'delete from ';<br>
if( empty( $this->alias['table'] ) ){<br>
throw new exception("请用table子句设置删除表");<br>
}else{<br>
<br>
$this->sql .= $this->alias['table'];<br>
}<br>
<br>
if( empty( $this->alias['where'] ) ){<br>
throw new exception("删除语句必须有where子句指定条件");<br>
}<br>
<br>
$this->sql .= ' where ' . $this->alias['where'];<br>
<br>
return $this->sql;<br>
}<br>
<br>
<br>
//查询语句<br>
public function select()<br>
{<br>
$this->ParseSelectSql();<br> $row = $this->conn->query( $this->sql )->fetchAll( PDO::FETCH_ASSOC );<br>
$result = [];<br>
<br>
foreach( $row as $key=>$vo ){<br>
<br>
$arrObj = clone $this; //Clone the current object to prevent contamination of this object<br>
$arrObj->data = $vo;<br>
$result[$key] = $arrObj;<br>
unset($arrObj);<br>
}<br>
<br>
Return $ result; <br>
}<br>
<br>
//Query one item<br>
Public function find()<br>
{<br>
$this->ParseSelectSql();<br>
$row = $this->conn->query( $this->sql )->fetch( PDO::FETCH_ASSOC );<br>
<br>
$arrObj = clone $this; //Clone the current object to prevent contamination of this object<br>
$arrObj->data = $row;<br>
$result = $arrObj;<br>
unset($arrObj);<br>
<br>
Return $ result; <br>
}<br>
<br>
//Add data<br>
Public function add($data)<br>
{<br>
if(
throw new exception("Add data add method parameters must be arrays");<br>
}<br>
<br>
$this->ParseAddSql();<br>
foreach( $data as $key=>$vo ){<br>
$this->sql .= " `{$key}` = '" . $vo . "',";<br>
}<br>
<br>
$this->conn->exec( rtrim( $this->sql, ',' ));<br>
return $this->conn->lastInsertId();<br>
}<br>
<br>
//Update statement<br>
Public function update($data)<br>
{<br>
if(
throw new exception("Update data update method parameters must be arrays");<br>
}<br>
<br>
$this->ParseUpdateSql();<br>
foreach( $data as $key=>$vo ){<br>
$this->sql .= " `{$key}` = '" . $vo . "',";<br>
}<br>
<br>
$this->sql = rtrim( $this->sql, ',') . ' where ' . $this->alias['where'];<br>
return $this->conn->exec( $this->sql );<br>
<br>
}<br>
<br>
//Delete statement<br>
Public function delete()<br>
{<br>
$this->ParseDeleteSql();<br>
return $this->conn->exec( $this->sql );<br> }<br>
<br>
//获取查询数据<br>
public function getData()<br>
{<br>
return $this->data;<br>
}<br>
<br>
//获取最后一次执行的sql语句<br>
public function getLastSql()<br>
{<br>
return $this->sql;<br>
}<br>
<br>
public function __get($name)<br>
{<br>
return $this->getData()[$name];<br>
}<br>
<br>
public function offsetExists($offset)<br>
{<br>
if( !isset( $this->getData()[$offset] ) ){<br>
return NULL;<br>
}<br>
}<br>
<br>
public function offsetGet($offset)<br>
{<br>
return $this->getData()[$offset];<br>
}<br>
<br>
public function offsetSet($offset, $value)<br>
{<br>
return $this->data[$offset] = $value;<br>
}<br>
<br>
public function offsetUnset($offset)<br>
{<br>
unset( $this->data[$offset] );<br>
}<br>
}你可以这么用：$orm = new MyOrm();<br>
<br>
//查询语句<br>
$res = $orm->table('user')->order('id desc')->select();<br>
$res = $orm->table('user')->where("name='test'")->order('id desc')->select();<br>
$res = $orm->table('user')->where(['id' => 1])->order('id desc')->find();<br>
$res = $orm->table('user')->where("age > 20")->group('group by name')->order('id desc')->limit(2)->select();<br>
$res = $orm->table('user')->where("age > 20")->group('group by name')->order('id desc')->limit('2,2')->select();<br>
<br>
//你可以这样处理数据<br>
foreach( $res as $key=>$vo ){<br>
echo $vo->name . '<br/>';<br>
}<br>
//也可以这样处理<br>
foreach( $res as $key=>$vo ){<br>
echo $vo['name'] . '<br/>';<br>
}<br>
//还可以这样<br>
foreach( $res as $key=>$vo ){<br>
print_r( $vo->getData() ) . '<br/>';<br>
}<br>
<br>
//添加数据<br>
$data = [<br>
'name' => 'test1',<br>
'age' => 20,<br>
'password' => '21232f297a57a5a743894a0e4a801fc3',<br>
'salt' => 'domain'<br>
];<br>
$res = $orm->table('user')->add( $data );<br>
<br>
//更新数据<br>
$res = $orm->table('user')->where(['id' => 4])->update( ['name' => 'sdfdsfdsd', 'salt' => '111'] );<br>
<br>
//删除数据<br>
$res = $orm->table('user')->where(['id' => 7, 'id' => 6])->delete();<br>
<br>
//获取执行的sql语句<br>
echo $orm->getLastSql();<br>
<br>
var_dump($res);