學會了使用了mysqli擴展庫以後,整體感受比面向過程的方法更加合理化,面向對象是大勢所趨,因此毫不能僅僅只用那一套老的mysql庫 了,也不利於php對mysql的操做,由於咱們在實際的開發中,不少仍是面向對象開發的,在這裏,就說一下mysqli之因此成爲擴展庫天然有其理由, 就批量操做的特性就大大的提升了代碼的執行效率。php
仍是和以往同樣,我喜歡把sql語句分爲dql語句和dml語句,主要是根據返回結果來分的,前者是結果集(須要釋放),後者是布爾值。html
下面是批量操做dml語句的代碼:mysql
<?php /*require_once "mysqltool.class.php"; $SqlHelper=new SqlTool(); $sql="insert into words(enword,chword) values( 'classroom','教室')"; $res=$SqlHelper->execute_dml($sql); //$res->free();*/ //這是mysqli批量增刪改數據 $mysqli= new MySqli("localhost","root","toor","education"); if($mysqli->connect_error){ die("鏈接失敗:".$mysqli->connect_error); } echo "鏈接成功<br/>"; /*//批量添加數據 $sql_1.="insert into words (enword,chword) values( 'classroom444','教室');"; $sql_1.="insert into words (enword,chword) values( 'classroom222','教室');"; $sql_1.="insert into words (enword,chword) values( 'classroom333','教室');"; $b=$mysqli->multi_query($sql_1); */ //批量刪除數據 /*$sql_2.="delete from words where id=14;"; $sql_2.="delete from words where id=15;"; $sql_2.="delete from words where id=16;"; $sql_2.="delete from words where id=17;"; $sql_2.="delete from words where id=18;"; $sql_2.="delete from words where id=19;"; $sql_2.="delete from words where id=20;"; $sql_2.="delete from words where id=22;"; */ //也能夠批量修改。。。。 /*可是不建議和select語句共用*/ $b=$mysqli->multi_query($sql_2); if(!$b){ echo "添加失敗"; }else{ echo "添加成功".$mysqli->connect_error; } $mysqli->close(); ?>
下面是操做dql語句的代碼:相對於dml就有一點複雜了:linux
<?php $mysqli= new MySqli("localhost","root","toor","education"); if($mysqli->connect_error){ die("鏈接失敗:".$mysqli->connect_error); } echo "鏈接成功<br/>"; <span style="white-space:pre"> </span>$sql_3.="select * from words;"; $sql_3.="select * from words_test1;"; <span style="white-space:pre"> </span>if($res=$mysqli->multi_query($sql_3)){ <span style="white-space:pre"> </span>do{ $result=$mysqli->store_result(); while($row=$result->fetch_row()){ foreach($row as $key=>$val){ echo "----".$val; } echo "<br/>"; } $result->free(); if(!$mysqli->more_results()){ break; } echo "***********************************************"; }while($mysqli->next_result()); } $mysqli->close(); ?>
主要就是後者返回的是一個結果集的集合,須要一層一層的把它剝開看可以看到東西。sql
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