PHP encapsulates a DB database mysql class-PHP Tutorial-php.cn

PHP encapsulates a DB database mysql class

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Release： 2016-07-23 08:54:58

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// Configure the database
define('DB_HOST', '127.0.0.1'); // Server address
define('DB_USER', 'root'); //Username
define('DB_PASS', ''); //Password
define('DB_DATABASENAME', 'fenxiao'); //Database
class Dbmysql
{
/*
*Variable
**/
private $tablename=""; //table name
private $fieldname="*";
private $conn;
private $where;
private $sql;
function __construct($tablename)
{
//Generate a connection
$this->conn = mysql_connect(DB_HOST, DB_USER, DB_PASS) or die("connect failed" . mysql_error ());
//Select database
mysql_select_db(DB_DATABASENAME, $this->conn);
//Set encoding format
mysql_query("SET NAMES utf8");
//var_dump($conn ;
}
//Set conditional statements
public function where($where)
{
$this->where=" where ".$where;
return $this;
}
//By specified field
public function field($keyword)
{
$this->fieldname=$keyword;
return $this;
}
//Set up connection query Table
public function table($table1,$table2,$field,$bool)
{
$this->tablename="$table1 LEFT JOIN $table2 ON $table1.$field$bool$table2.$ field";
//print_r($this->tablename);
return $this;
}
//Set up multi-table query
public function addtable($table1,$table2,$field ,$bool)
{
$this->tablename.=" LEFT JOIN $table2 ON $table1.$field$bool$table2.$field";
//print_r($this->tablename) ;
return $this;
}
//Set up the connection query table
##SELECT * FROM [wx_order LEFT JOIN wx_shopcar ON wx_shopcar.oid=wx_order.oid and wx_order.uid=wx_shopcar.uid LEFT JOIN wx_goods ON wx_shopcar.gid=wx_goods.gid] WHERE wx_order.oid=1 and wx_order.uid=3
public function settable($sql)
{
$this->tablename=$sql;
// print_r($this->tablename);
return $this;
}
//Query all databases and output them in array form
public function select()
{
/**
* Query all data in the database
* */
$arr=array();
//Execute sql statement
$result = mysql_query("select ".$this->fieldname." from ".$this->tablename.$this- >where, $this->conn);
while ($row = mysql_fetch_assoc($result)) {
array_push($arr, $row);
}
return $ arr;
}
//Search for specified field data
public function find()
{
//Execute sql statement
$result = mysql_query("select ".$this->fieldname. " from ".$this->tablename.$this->where, $this->conn);
$result = mysql_fetch_assoc($result);
return $result;
}
//Add data to the database
public function add($data)
{
$keysql='';
$valuesql='';
foreach ($data as $key => $value) {
$keysql.=",`$key`";
$valuesql.=",'$value'";
}
$keysql=substr($keysql, 1);
$valuesql=substr ($valuesql, 1);
$result=mysql_query("insert into `".$this->tablename."` ($keysql) VALUES($valuesql)");
$id=mysql_insert_id();
//print_r("insert into `".$this->tablename."` ($keysql) VALUES($valuesql)");
return $id;
}
//Modify the database The contents of
public function save($data)
{
$keysql='';
$valuesql='';
foreach ($data as $key => $value) {
$keysql .=",`$key`='$value'";
}
$keysql=substr($keysql, 1);
//print_r($keysql);
//echo "
$result=mysql_query("UPDATE `".$this->tablename."` SET ".$keysql.$this->where);
//print_r("UPDATE `".$ this->tablename."` SET ".$keysql.$this->where);
return $result;
}
##Delete data
public function delete()
{
$result=mysql_query("DELETE FROM $this->tablename $this->where");
//print_r(" DELETE FROM $this->tablename $this->where");
return $result;
}
}
/**
* mysql_fetch_row: Returns each field of a single column [0]=>"111"
* mysql_fetch_field: Gets field information. [0]=> ['name']=> object
* mysql_fetch_array returns array data. [0]=>"asasds" ['name']=>
*/
?>

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Installed, PHP, mysql