php教程

mysqli::next_result

mysqli_next_result

(PHP 5, PHP 7)

mysqli::next_result -- mysqli_next_result为读取 multi_query 执行之后的下一个结果集做准备

说明

面向对象风格

mysqli::next_result ( void ) : bool

过程化风格

mysqli_next_result ( mysqli $link ) : bool

mysqli_multi_query() 函数执行之后, 为读取下一个结果集做准备, 然后可以使用 mysqli_store_result()mysqli_use_result() 函数读取下一个结果集。

参数

link

仅以过程化样式:由mysqli_connect()mysqli_init() 返回的链接标识。

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

See mysqli_multi_query().

参见

User Contributed Notes

admin at travian-utils dot com 28-Oct-2009 11:24
Stored procedures few rowset example:

some_file.php
<?php
function proc() {
  global
$global;
 
$db_connect_list = array('site');
 
SQLinit($db_connect_list);
  if(isset(
$global['error'])){return;}
 
SQL('CALL `procedure`();');
  while(
$row=mysqli_fetch_assoc($global['result'])){
   
// do some
 
}
 
SQLnext();
  while(
$row=mysqli_fetch_assoc($global['result'])){
   
// do some
 
}
 
SQLnext();
  while(
$row=mysqli_fetch_assoc($global['result'])){
   
// do some
 
}
 
SQLclose($db_connect_list);
}
?>

config.php
<?php
  $global
['sys']['db']['site'] = array('host'=>'localhost', 'user'=>'site', 'pass'=>'');
?>

engine.php
<?php
function SQLinit($array_list){
  global
$global;
  foreach(
$array_list as $set){
    if(!
$global['sys']['db'][$set]['connect'] = mysqli_connect(
       
$global['sys']['db'][$set]['host'],
       
$global['sys']['db'][$set]['user'],
       
$global['sys']['db'][$set]['pass'])){
     
$global['error']['code'] = 500;
     
$global['error']['text'] = 'Database not avaliable';
     
$w=fopen('error.log','a+');
     
fwrite($w,'time: '.date('Y M d H:i:s')."\r\n");
     
fwrite($w,'errno: '.mysqli_connect_errno()."\r\n");
     
fwrite($w,'error: '.mysqli_connect_error()."\r\n");
     
fclose($w);
      return;
    }
    if(!isset(
$global['sys']['default_connect']))
     
$global['sys']['default_connect'] = $global['sys']['db'][$set]['connect'];
   
SQL('SET NAMES \'utf8\' COLLATE \'utf8_unicode_ci\';', $global['sys']['db'][$set]['connect']);
   
SQL('SET CHARACTER SET \'utf8\';', $global['sys']['db'][$set]['connect']);
   
SQL('SET character_set_connection = \'utf8\';', $global['sys']['db'][$set]['connect']);
  }
}
function
mTime(){
  list(
$usec, $sec) = explode(" ", microtime());
  return ((float)
$usec+(float)$sec);
}
function
SQL($sql, $connect = -1){
  global
$global;
  if(
$connect === -1)$connect = $global['sys']['default_connect'];
  if(isset(
$global['error']['sql']))return;
  while (
$connect->next_result()) $connect->store_result();
 
$begin=mTime();
 
$global['result']=mysqli_query($connect, $sql);
 
$end=mTime();
 
$global['sys']['time_sql']+=$end-$begin;
 
$error=mysqli_error($connect);
  if(
$error!=''){
   
$global['error']['code'] = 502;
   
$global['error']['text'] = 'SQL error';
   
$global['error']['sql'] = true;
   
$w=fopen('error.log','a+');
   
fwrite($w,'time: '.date('Y M d H:i:s')."\r\n");
   
fwrite($w,'errno: '.mysqli_errno($connect)."\r\n");
   
fwrite($w,'error: '.$error."\r\n");
   
fwrite($w,'sql: '.$sql."\r\n");
   
fclose($w);
  }else{
   
$w=fopen('sql.log','a+');
   
fwrite($w,'time: '.date('Y M d H:i:s')."\r\n");
   
fwrite($w,'sql: '.$sql."\r\n");
   
fclose($w);
  }
}

function
SQLnext($connect = -1){
  global
$global;
  if(
$connect === -1)$connect = $global['sys']['default_connect'];
  if(isset(
$global['error']['sql']))return;
 
$connect->next_result();
 
$global['result'] = $connect->store_result();
}

function
SQLclose($array_list){
  global
$global;
  foreach(
$array_list as $set){
   
mysqli_close($global['sys']['db'][$set]['connect']);
  }
}
?>
pawel dot barcik at gmail dot com 21-Jun-2008 05:26
this function returns FALSE when you have an error in your syntax in one of your queries, so be carefull with this type of construction when tracking errors:

<?php

//error in the second sub query 
$result = $db->multi_query("select * from news; seleeeeeeect id from news; update news set title='new title' where id= 12 ");

//code inside object class
$this->_db = new Mysqli($host, $user, $password, $database, $port, $socket);
       
do {
   
$result = $this->_db->store_result();
   
$this->_resultMulti[] = $result;
   
$this->_errnoMulti[] = $this->_db->errno;

    if(
is_object($result)) {
       
$result->free_result();
    }
               
} while(
$this->_db->next_result());

?>

in this construction all you have in the $this->_errnoMulti is :

array(1) {
  [0]=>
  int(0)
}
 
which means that there are no errors if you are not checking how many queries are executed!

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