使用预处理语句实现插入删除修改数据

预处理插入语句

   
     

    
      
$m=new mysqli('localhost','root','','db');
    
      
$m->set_charset('utf8');
    
      
$stmt=$m->prepare('insert into stu values(null,?,?,?)');
    
      
$n='aa';
    
      
$g='保密';
    
      
$s=10;
    
      
$stmt->bind_param('ssi',$n,$g,$s);
    
      
$stmt->execute();
    
      
$stmt->close();
    
      
$m->close();
   
     

预处理实现数据删除

   
     

    
      
$m=new mysqli('localhost','root','','db');
    
      
$m->set_charset('utf8');
    
      
$stmt=$m->prepare('delete from stu where sid in (?,?)');
    
      
$id1=1;
    
      
$id2=2;
    
      
$stmt->bind_param('ii',$id1,$id2);
    
      
$stmt->execute();
    
      
$stmt->free_result();
    
      
$stmt->close();
    
      
$m->close()
   
     

使用预处理语句实现数据的修改

   
     

    
      
$m=new mysqli('localhost','root','','db');
    
      
$m->set_charset('utf8');
    
      
$stmt=$m->prepare('update stu set sname=? where sid=?');
    
      
$s='hello';
    
      
$d=7;
    
      
$stmt->bind_param('ss',$s,$d);
    
      
$stmt->execute();
    
      
$stmt->free_result();
    
      
$stmt->close();
    
      
$m->close();
   
     

来自为知笔记(Wiz)