优化while和SQL的foreach

优化while和SQL的foreach

本文介绍了优化while和SQL的foreach的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我的代码:

  $ text = '12 -name-y-86'; 
$ array = explode(' - ',$ text);
foreach($ array as $ value){
$ sql = mysql_query(SELECT * FROM`table` WHERE`pid` ='$ value'ORDER BY`id` LIMIT 3);
echo'***'。$ value。'***';
echo'< br />';
while($ row = mysql_fetch_array($ sql)){
echo $ row ['title'];
echo'< br />';
}
echo'< br />< br />';

$ / code $ / pre
$ b $ p

标题3



名称



ti1






y

tle1

tle2



tle3



86

mytitle1

mytitle2

mytitle3
p>

这段代码在$ text中有更多的值,服务器已经关闭了!

解决方案
  $ text = '12 -name-y -86' ; 
$ array = explode(' - ',$ text);
$ array ='。 implode(',',$ array)。 ;
$ sql = mysql_query(SELECT * FROM`table` WHERE`pid` IN('。$ array。')ORDER BY`id` LIMIT 3);
while($ row = mysql_fetch_array($ sql)){
echo $ row ['title'];
echo'< br />';
}
echo'< br />< br />';


My code :

$text = '12-name-y-86';
$array = explode('-',$text);
foreach($array as $value) {
    $sql = mysql_query("SELECT * FROM `table` WHERE `pid`='$value' ORDER BY `id` LIMIT 3");
    echo '***'.$value.'***';
    echo '<br />';    
    while($row = mysql_fetch_array($sql)) {
        echo $row['title'];
        echo '<br />';
    }
    echo '<br /><br />';
}

Print :

12

title1

title2

title3

name

ti1

ti2

ti3

y

tle1

tle2

tle3

86

mytitle1

mytitle2

mytitle3

This code work full buy for more values in $text , server has down !

解决方案

Try to select all records in just one query, like this:

$text = '12-name-y-86';
$array = explode('-', $text);
$array = "'" . implode(',', $array) . "'";
$sql = mysql_query("SELECT * FROM `table` WHERE `pid` IN (' . $array . ') ORDER BY `id` LIMIT 3");
while($row = mysql_fetch_array($sql)) {
    echo $row['title'];
    echo '<br />';
}
echo '<br /><br />';

这篇关于优化while和SQL的foreach的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-27 03:20