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一款简单实用的php操作mysql数据库类

2018-12-30 PHP 前端之家

前端之家收集整理的这篇文章主要介绍了一款简单实用的php操作mysql数据库类，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。

本文实例讲述了一款简单实用的PHP操作MysqL 数据库类。分享给大家供大家参考。具体如下：

代码如下:

数据库连接类，他会自动加载sql防注入功能，过滤一些敏感的SQL查询关键词，同时还可以增加判断字段 show table status的性质与show table类获取数据库所有表名等。*/ @ini_set('MysqL.trace_mode','off'); class MysqL { public $dblink; public $pconnect; private $search = array('/union(s*(/*.**/)?s*)+select/i','/load_file(s*(/*.**/)?s*)+(/i','/into(s*(/*.**/)?s*)+outfile/i'); private $replace = array('union select','load_file (','into outfile'); private $rs;

function __construct($hostname,$username,$userpwd,$database,$pconnect=false,$charset='utf8')
{
define('allowed_htmltags','<meta><body><a><p><br><hr><h1><h2><h3><h4><h5><h6><font><u><i><b><h3><div><span><ol><ul><li><img><table><tr><td><map>');<br /> $this->pconnect=$pconnect;<br /> $this->dblink=$pconnect?<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_pconnect($hostname,$userpwd):<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_connect($hostname,$userpwd);<br /> (!$this->dblink||!is_resource($this->dblink)) && fatal_error("connect to the database unsuccessfully!");<br /> @<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_unbuffered_query("set names {$charset}");<br /> if($this->version()>'5.0.1')<br /> {<br /> @<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_unbuffered_query("set <a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>_mode = ''");<br /> }<br /> @<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_select_db($database) or fatal_error("can not select table!");<br /> return $this->dblink;<br /> } </p> <p>function query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,$unbuffered=false)<br /> {<br /> //echo $<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>.'<br>';<br /> $this->rs=$unbuffered?<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_unbuffered_query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,$this->dblink):<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,$this->dblink);<br /> //(!$this->rs||!is_resource($this->rs)) && fatal_error("execute the query unsuccessfully! error:".<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_error());<br /> if(!$this->rs)fatal_error('在执行<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>语句 '.$<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>.' 时发生以下<a href="https://www.jb51.cc/tag/cuowu/" target="_blank" class="keywords">错误</a>:'.<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_error());<br /> return $this->rs;<br /> } </p> <p>function fetch_one($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>)<br /> {<br /> $this->rs=$this->query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>);<br /> return dircms_strips教程lashes($this->filter_pass(<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_fetch_array($this->rs,<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_assoc)));<br /> } </p> <p>function get_maxfield($filed='id',$table) // <a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>$table表中$filed字段的最大值<br /> {<br /> $r=$this->fetch_one("select {$table}.{$filed} from <code>{$table}</code> order by <code>{$table}</code>.<code>{$filed}</code> desc limit 0,1");<br /> return $r[$filed];<br /> } </p> <p>function fetch_all($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>)<br /> {<br /> $this->rs=$this->query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>);<br /> $result=array();<br /> while($rows=<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_fetch_array($this->rs,<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_assoc))<br /> {<br /> $result[]=$rows;<br /> } </p> <p><a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_free_result($this->rs);<br /> return dircms_stripslashes($this->filter_pass($result));<br /> } </p> <p>function fetch_all_withkey($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,$key='id')<br /> {<br /> $this->rs=$this->query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>);<br /> $result=array();<br /> while($rows=<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_fetch_array($this->rs,<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_assoc))<br /> {<br /> $result[$rows[$key]]=$rows;<br /> } </p> <p><a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_free_result($this->rs);<br /> return dircms_stripslashes($this->filter_pass($result));<br /> } </p> <p>function last_insert_id()<br /> {<br /> if(($insertid=<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_insert_id($this->dblink))>0)return $insertid;<br /> else //如果 auto_increment 的列的类型是 bigint，则 <a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_insert_id() 返回的值将不正确.<br /> {<br /> $result=$this->fetch_one('select last_insert_id() as insertid');<br /> return $result['insertid'];<br /> }<br /> } </p> <p>function insert($tbname,$varray,$replace=false)<br /> {<br /> $varray=$this->escape($varray);<br /> $tb_fields=$this->get_fields($tbname); // <a href="https://www.jb51.cc/tag/shengji/" target="_blank" class="keywords">升级</a>一下，<a href="https://www.jb51.cc/tag/zengjia/" target="_blank" class="keywords">增加</a>判断字段是否存在 </p> <p>foreach($varray as $key => $value)<br /> {<br /> if(in_array($key,$tb_fields))<br /> {<br /> $fileds[]='<code>'.$key.'</code>';<br /> $values[]=is_string($value)?'''.$value.''':$value;<br /> }<br /> } </p> <p>if($fileds)<br /> {<br /> $fileds=implode(',',$fileds);<br /> $fileds=str_replace(''','`',$fileds);<br /> $values=implode(',$values);<br /> $<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>=$replace?"replace into {$tbname}({$fileds}) values ({$values})":"insert into {$tbname}({$fileds}) values ({$values})";<br /> $this->query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,true);<br /> return $this->last_insert_id();<br /> }<br /> else return false;<br /> } </p> <p>function update($tbname,$array,$where = '')<br /> {<br /> $array=$this->escape($array);<br /> if($where)<br /> {<br /> $tb_fields=$this->get_fields($tbname); // <a href="https://www.jb51.cc/tag/zengjia/" target="_blank" class="keywords">增加</a>判断字段是否存在 </p> <p>$<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a> = '';<br /> foreach($array as $k=>$v)<br /> {<br /> if(in_array($k,$tb_fields))<br /> {<br /> $k=str_replace(''','',$k);<br /> $<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a> .= ",<code>$k</code>='$v'";<br /> }<br /> }<br /> $<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a> = substr($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,1); </p> <p>if($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>)$<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a> = "update <code>$tbname</code> set $<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a> where $where";<br /> else return true;<br /> }<br /> else<br /> {<br /> $<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a> = "replace into <code>$tbname</code>(<code>".implode('</code>,<code>',array_keys($array))."</code>) values('".implode("','",$array)."')";<br /> }<br /> return $this->query($<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>,true);<br /> } </p> <p>function <a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_delete($tbname,$idarray,$filedname='id')<br /> {<br /> $idwhere=is_array($idarray)?implode(',$idarray):intval($idarray);<br /> $where=is_array($idarray)?"{$tbname}.{$filedname} in ({$idwhere})":" {$tbname}.{$filedname}={$idwhere}"; </p> <p>return $this->query("delete from {$tbname} where {$where}",true);<br /> } </p> <p>function get_fields($table)<br /> {<br /> $fields=array();<br /> $result=$this->fetch_all("show columns from <code>{$table}</code>");<br /> foreach($result as $val)<br /> {<br /> $fields[]=$val['field'];<br /> }<br /> return $fields;<br /> } </p> <p>function get_table_status($database)<br /> {<br /> $status=array();<br /> $r=$this->fetch_all("show table status from <code>".$database."</code>"); /////// show table status的性质与show table类似，不过，可以提供每个表的大量信息。<br /> foreach($r as $v)<br /> {<br /> $status[]=$v;<br /> }<br /> return $status;<br /> } </p> <p>function get_one_table_status($table)<br /> {<br /> return $this->fetch_one("show table status like '$table'");<br /> } </p> <p>function create_fields($tbname,$fieldname,$size=0,$type='varchar') // 2010-5-14 修正一下<br /> {<br /> if($size)<br /> {<br /> $size=strtoupper($type)=='varchar'?$size:8;<br /> $this->query("alter table <code>{$tbname}</code> add <code>$fieldname</code> {$type}( {$size} ) not null",true);<br /> }<br /> else $this->query("alter table <code>{$tbname}</code> add <code>$fieldname</code> mediumtext not null",true);<br /> return true;<br /> } </p> <p>function get_tables() //<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>所有表表名<br /> {<br /> $tables=array();<br /> $r=$this->fetch<em>all("show tables");<br /> foreach($r as $v)<br /> {<br /> foreach($v as $v</em>)<br /> {<br /> $tables[]=$v_;<br /> }<br /> }<br /> return $tables;<br /> } </p> <p>function create_model_table($tbname) //创建一个<a href="https://www.jb51.cc/tag/neirong/" target="_blank" class="keywords">内容</a>模型表（start：初始只有字段contentid int(20)，用于<a href="https://www.jb51.cc/tag/neirong/" target="_blank" class="keywords">内容</a>表，/////////////////////// update：2010-5-20 默认加入<code>content</code> mediumtext not null,字段）<br /> {<br /> if(in_array($tbname,$this->get_tables())) return false; ///////////////////// 当表名已经存在时，返回 false<br /> if($this->query("create table <code>{$tbname}</code> (<br /> <code>contentid</code> mediumint(8) not null,<br /> <code>content</code> mediumtext not null,<br /> key ( <code>contentid</code> )<br /> ) engine = myisam default charset=utf8",true))return true; //////////////////// 成功则返回 true<br /> return false; //////////////失败返回 false<br /> } </p> <p>function create_table($tbname) //创建一个会员模型空表（初始只有字段userid int(20)，用于会员表，2010-4-26）<br /> {<br /> if(in_array($tbname,$this->get_tables())) return false;<br /> if($this->query("create table <code>{$tbname}</code> (<br /> <code>userid</code> mediumint(8) not null,<br /> key ( <code>userid</code> )<br /> ) engine = myisam default charset=utf8",true))return true;<br /> return false;<br /> } </p> <p>function escape($str) // 过滤危险字符<br /> {<br /> if(!is_array($str)) return str_replace(array('n','r'),array(chr(10),chr(13)),<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_real_escape_string(preg_replace($this->search,$this->replace,$str),$this->dblink));<br /> foreach($str as $key=>$val) $str[$key] = $this->escape($val);<br /> return $str;<br /> } </p> <p>function filter_pass($string,$allowedtags = '',$disabledattributes = array('onabort','onactivate','onafterprint','onafterupdate','onbeforeactivate','onbeforecopy','onbeforecut','onbeforedeactivate','onbeforeeditfocus','onbeforepaste','onbeforeprint','onbeforeunload','onbeforeupdate','onblur','onbounce','oncellchange','onchange','onclick','oncontextmenu','oncontrolselect','oncopy','oncut','ondataavaible','ondatasetchanged','ondatasetcomplete','ondblclick','ondeactivate','ondrag','ondragdrop','ondragend','ondragenter','ondragleave','ondragover','ondragstart','ondrop','onerror','onerrorupdate','onfilterupdate','onfinish','onfocus','onfocusin','onfocusout','onhelp','onkeydown','onkeypress','onkeyup','onlayoutcomplete','onload','onlosecapture','onmousedown','onmouseenter','onmouseleave','onmousemove','onmoveout','onmou<a href="https://www.jb51.cc/tag/SEO/" title="SEO">SEO</a>教程ver','onmouseup','onmousewheel','onmove','onmoveend','onmovestart','onpaste','onpropertychange','onreadystatechange','onreset','onresize','onresizeend','onresizestart','onrowexit','onrowsdelete','onrowsinserted','onscroll','onselect','onselectionchange','onselectstart','onstart','onstop','onsubmit','onunload'))<br /> {<br /> if(is_array($string))<br /> {<br /> foreach($string as $key => $val) $string[$key] = $this->filter_pass($val,allowed_htmltags);<br /> }<br /> else<br /> {<br /> $string = preg_replace('/s('.implode('|',$disabledattributes).').<em>?([s>])/','',preg_replace('/<(.</em>?)>/ie',"'<'.preg_replace(array('/网页特效:[^"']<em>/i','/(".implode('|',$disabledattributes).")[ ]</em>=[ ]<em>["'][^"']</em>["']/i','/s+/'),array('',' '),stripslashes('')) . '>'",strip_tags($string,$allowedtags)));<br /> }<br /> return $string;<br /> } </p> <p>function drop_table($tbname)<br /> {<br /> return $this->query("drop table if exists <code>{$tbname}</code>",true);<br /> } </p> <p>function version()<br /> {<br /> return <a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_get_server_info($this->dblink);<br /> }<br /> } </p> </div></p> <p>希望本文所述对大家的<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a>程序设计有所帮助。</p><i class="glyphicon glyphicon-link"></i> 原文链接：https://www.f2er.com/php/23149.html</div> <div class="topcard-tags"><a href="https://www.f2er.com/tag/mysqlp/" class="tag_link" target="_blank">mysql</a><a href="https://www.f2er.com/tag/phpp/" class="tag_link" target="_blank">php</a><a href="https://www.f2er.com/tag/caozuo/" class="tag_link" target="_blank">操作</a><a href="https://www.f2er.com/tag/caozuop/" class="tag_link" target="_blank">操作</a><a href="https://www.f2er.com/tag/pcaozuo/" class="tag_link" target="_blank">操作</a><a href="https://www.f2er.com/tag/shujuku/" class="tag_link" target="_blank">数据库</a><a href="https://www.f2er.com/tag/shujukup/" class="tag_link" target="_blank">数据库</a><a href="https://www.f2er.com/tag/lei/" class="tag_link" target="_blank">类</a><a href="https://www.f2er.com/tag/leip/" class="tag_link" target="_blank">类</a><a href="https://www.f2er.com/tag/plei/" class="tag_link" target="_blank">类</a><a href="https://www.f2er.com/tag/leip/" class="tag_link" target="_blank">类</a></div> <ul class="list-group"> <li class="list-group-item"><a href="https://www.f2er.com/php/23150.html" title="php表单敏感字符过滤类">上一篇：php表单敏感字符过滤类</a><a href="https://www.f2er.com/php/23147.html" title="PHP原生函数一定好吗？" class="text-muted pull-right">下一篇：PHP原生函数一定好吗？</a> </li> </ul> </div> </div> </div>  <div class="row row-sm"> <div class="col-sm-12 col-md-12 col-lg-12"> <div class="card"> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-4605373693034661" data-ad-slot="9144498553"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script></div> </div> </div> <div class="row row-sm"> <div class="col-sm-12 col-md-12 col-lg-12"> <div class="card"> <div class="title"><h1>猜你在找的PHP相关文章</h1></div> <div class="list_con"> <a href="https://www.f2er.com/php/997740.html" title="Hessian通讯协议【附PHP源代码】"><img class="lazy" src="https://www.f2er.com/images/np.jpg" data-original="https://www.f2er.com/res/2021/02-22/19/361df348b2385424b031f281e9807f35.png" title="" width="160" height="90" style="float:right;margin-left:30px;display:none;" /><div class="title">Hessian通讯协议【附PHP源代码】</div> <div class="summary">Hessian开源的远程通讯，采用二进制 RPC的协议，基于 HTTP 传输。可以实现PHP调用Java,Pyt...</div> <time class="summary">作者：前端之家时间：2021-02-22</time> </a> </div> <div class="list_con"> <a href="https://www.f2er.com/php/997739.html" title="初识Mongodb总结"><img class="lazy" src="https://www.f2er.com/images/np.jpg" data-original="https://www.f2er.com/res/2021/02-22/19/b4d39ef6acdce4fc3ef2fe713961a4c2.png" title="" width="160" height="90" style="float:right;margin-left:30px;display:none;" /><div class="title">初识Mongodb总结</div> <div class="summary">初识Mongodb的一些总结,在Mac Os X下真实搭建mongodb环境,以及分享个Mongodb管理工具,学习...</div> <time class="summary">作者：前端之家时间：2021-02-22</time> </a> </div> <div class="list_con"> <a href="https://www.f2er.com/php/997738.html" title="初识Mongodb之[CURD]-PHP版"><img class="lazy" src="https://www.f2er.com/images/np.jpg" data-original="https://www.f2er.com/res/2021/02-22/19/d009a8111c246e74506457f4b9a3356b.png" title="" width="160" height="90" style="float:right;margin-left:30px;display:none;" /><div class="title">初识Mongodb之[CURD]-PHP版</div> <div class="summary">边看边操作,这样才能记得牢,实践是检验真理的唯一标准.光看不练假把式,光练不看傻把式,边看...</div> <time class="summary">作者：前端之家时间：2021-02-22</time> </a> </div> <div class="list_con"> <a href="https://www.f2er.com/php/997665.html" title="php学习日志 - echo&print"><img class="lazy" src="https://www.f2er.com/images/np.jpg" data-original="https://www.f2er.com/res/2021/02-21/08/daa4210b68d9838740e9ea77a21307fa.png" title="" width="160" height="90" style="float:right;margin-left:30px;display:none;" /><div class="title">php学习日志 - echo&print</div> <div class="summary">在php中，结果输出一共有两种方式：echo和print，下面将对两种方式做一个比较。 echo与pri...</div> <time class="summary">作者：前端之家时间：2021-02-21</time> </a> </div> <div class="list_con"> <a href="https://www.f2er.com/php/997664.html" title="The mbstring extension is missing. 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