<?php
/**
* Modular:
* Created: PhpStorm.
* User: dbag
* Date: 2019/9/2
* Time: 15:06
*/
class Demo {
protected $table='';
protected $where='';
protected $field='*';
public function where($where="1=1"){
if($this->where){
$this->where .= ' and '.$where;
}else{
$this->where= $where;
}
return $this;
}
public function table($table){
$this->table=$table;
return $this;
}
public function field($field='*'){
$this->field = $field;
return $this;
}
public function find(){
$sql = "select {$this->field} from {$this->table} where {$this->where} limit 1";
return $sql;
}
}
$db = new Demo();
$sql = $db->field('id,username,realname')
->where("id=123")
->where("is_del=1")
->table('users')
->find();
echo $sql;
# select id,username,realname from users where id=123 and is_del=1 limit 1
