求一个读取数据库代码
求一个独立页面代码 本人不懂编程 不要给提示思路什么的
先谢谢各位大大mysql账号132 密码456读取库名aa 表名bb 表里的CC列假设读取CC字段前500个数值 读取数值9字符记录有多少个9字符 并且显示到网页上如有10个网页显示10 无则显示0
------解决方案--------------------
<br /> @mysql_connect("localhost","123","456");<br /> @mysql_select_db("aa");<br /> mysql_query("set names utf8");<br /> $result=mysql_query("select cc from bb limit 0,500");<br /> while($row=mysql_fetch_array($result)){ <br /> $ar[]=$row['cc']; <br /> }<br /> $cnt=count($ar);<br /> for($i=0;$i<$cnt;$i++){<br /> if($ar[$i]==9){<br /> $b[]=$i;<br /> }<br /> }<br /> $cnt_b=count($b);<br /> if($cnt_b>0){<br /> echo $cnt_b;<br /> }else{<br /> echo 0;<br /> }<br />
------解决方案--------------------
$result=mysql_query("select order_state from order limit 500");<br />$counter=0;<br />while($row=mysql_fetch_array($result)){ <br /> if($row[0]==9) $counter++; <br />}<br />echo $counter;

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PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

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