How does php operate mysql to obtain select results?

This article mainly introduces several methods for PHP to operate mysql to obtain select results. Friends who need it can refer to it

If you use MYSQL_BOTH, you will get an array that contains both association and numeric index.

Use MYSQL_ASSOC to get only relational indexes (just like mysql_fetch_assoc()),

Use MYSQL_NUM to get only numeric indexes (just like mysql_fetch_row).

1. mysql_fetch_array($rs,MYSQL_ASSOC)

[@test01 model]# php test.php 
Array 
( 
 [name] => hellokitty 
 [addr] => i dont kno 
) 
[@test01 model]# more test.php 
<?php 
 $link=mysql_connect("10.12.136.181","hello","hello"); 
 if(!$link) 
  echo "没有连接成功!"; 
 mysql_select_db("hhhhh", $link); 
 $q = "SELECT * FROM hello"; 
 mysql_query("SET NAMES GB2312"); 
 $rs = mysql_query($q); 
 if(!$rs) 
 { 
  die("Valid result!"); 
 } 
 $result=mysql_fetch_array($rs,MYSQL_ASSOC); 
 print_r($result); 
 mysql_free_result($rs); 
?>

2.mysql_fetch_array($rs, MYSQL_BOTH); Get the array

##

[@test01 model]# more test.php 
<?php 
 $link=mysql_connect("10.12.136.181","hello","hello"); 
 if(!$link) 
  echo "没有连接成功!"; 
 mysql_select_db("hhhhh", $link); 
 $q = "SELECT * FROM hello"; 
 mysql_query("SET NAMES GB2312"); 
 $rs = mysql_query($q); 
 if(!$rs) 
 { 
  die("Valid result!"); 
 } 
 $result=mysql_fetch_array($rs,MYSQL_ASSOC); 
 print_r($result); 
 mysql_free_result($rs); 
?> 
[@test01 model]# vim test.php 
[@test01 model]# php test.php 
Array 
( 
 [0] => hellokitty 
 [name] => hellokitty 
 [1] => i dont kno 
 [addr] => i dont kno 
) 
[@test01 model]#

##3.mysql_fetch_array($rs,MYSQL_NUM) Get the array

[@test01 model]# php test.php 
Array 
( 
 [0] => hellokitty 
 [1] => i dont kno 
) 
[@test01 model]# more test.php 
<?php 
 $link=mysql_connect("10.12.136.181","hello","hello"); 
 if(!$link) 
  echo "没有连接成功!"; 
 mysql_select_db("hhhhh", $link); 
 $q = "SELECT * FROM hello"; 
 mysql_query("SET NAMES GB2312"); 
 $rs = mysql_query($q); 
 if(!$rs) 
 { 
  die("Valid result!"); 
 } 
 $result=mysql_fetch_array($rs,MYSQL_NUM); 
 print_r($result); 
 mysql_free_result($rs); 
?> 
[@test01 model]#

The following is a supplement:

Several ways to obtain the result set in php

<?php 
 $conn=mysql_connect("localhost","root",""); 
 $select=mysql_select_db("books",$conn); 
  $query="insert into computers(name,price,publish_data) "; 
 $query.="values(&#39;JSP&#39;,28.00,&#39;2008-11-1&#39;)"; 
 $query="select * from computers"; 
 $result=mysql_query($query); 
  //以下是使用mysql_result()函数来获取到查询结果 
 $num=mysql_num_rows($result); 
 for($rows_count=0;$rows_count<$num;$rows_count++){ 
 echo "书名：".mysql_result($result,$rows_count,"name"); 
 echo "价格：".mysql_result($result,$rows_count,"price"); 
 echo "出版日期：".mysql_result($result,$rows_count,"publish_data")."<br>"; 
 } 
  //以下是使用mysql_fetch_row()函数来获取到查询结果 
  while($row=mysql_fetch_row($result)) 
 { 
 echo "书号：".$row[0]."<br>"; 
 echo "书名：".$row[1]."<br>"; 
 echo "价格：".$row[2]."<br>"; 
 echo "出版日期：".$row[3]."<br>"; 
 echo "<br>"; 
 } 
 //以下是使用mysql_fetch_array()函数来获取到查询结果 
 while($row=mysql_fetch_array($result)) 
 { 
 echo "书号：".$row[0]."<br>"; 
 echo "书名：".$row[1]."<br>"; 
 echo "价格：".$row["price"]."<br>"; 
 echo "出版日期：".$row["publish_data"]."<br>"; 
 echo "<br>"; 
 }

//mysql_fetch_assoc()同mysql_fetch_array($result,MYSQL_ASSOC)一样

while($row = mysql_fetch_assoc($res)){

 echo $row[&#39;price&#39;].&#39;::&#39;.$row[&#39;publish_data&#39;].”;
} //$row[0]不能取值

 //以下是使用mysql_fetch_object()函数来获取到查询结果 
 while($row=mysql_fetch_object($result)) 
 { 
 echo "书号：".$row->id."<br>"; 
 echo "书名：".$row->name."<br>"; 
 echo "价格：".$row->price."<br>"; 
 echo "出版日期：".$row->publish_data."<br>"; 
 echo "<br>";  
 } 
?>

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