PHP基础有关问题

";    $sql = "show databases";  //查找某个库是否存在    print("$sql
");    $sql_return = mysql_query($sql);    echo "$sql_return 
";    while($row = mysql_fetch_array($sql_return))    {        for($i = 0; $i != count($row); ++$i)        {            printf("%s", $row[0]);            echo "
";        }    }    //mysql_select_db('web', $conn);    ?>

数据库连接成功show databasesResource id #4 information_schemainformation_schemamysqlmysqlperformance_schemaperformance_schematesttestwebweb

数据库连接成功show databasesResource id #4 Array ( [0] => information_schema [Database] => information_schema ) Array ( [0] => mysql [Database] => mysql ) Array ( [0] => performance_schema [Database] => performance_schema ) Array ( [0] => test [Database] => test ) Array ( [0] => web [Database] => web )

        for($i = 0; $i != count($row); ++$i)        {            printf("%s", $row[0]);            echo "
";        }
声明：本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn核实处理。
专题推荐：quot mysql array gt Database

			   上一篇：PHP中关于双引号和单引号的有关问题               下一篇：自己动手写 PHP MVC 框架(40节精讲/巨细/新人进阶必看)