php 与mysql 连接

<code><span>$db_host</span>=<span>'localhost'</span>;   <span>//数据库主机</span><span>$db_database</span>=<span>'test'</span>;   <span>//数据库名</span><span>$db_username</span>=<span>'root'</span>;   <span>//账户名</span><span>$db_password</span>=<span>''</span>;   <span>//密码</span><span>$connection</span>=mysql_connect(<span>$db_host</span>,<span>$db_username</span>,<span>$db_password</span>);<span>//连接到数据库</span>
mysql_query(<span>"set names 'utf8'"</span>);<span>//编码转化</span><span>if</span>(!<span>$connection</span>){
<span>die</span>(<span>"could not connect to the database:"</span>.mysql_error());<span>//诊断连接错误</span>}
<span>$db_selecct</span>=mysql_select_db(<span>$db_database</span>);<span>//选择数据库</span><span>if</span>(!<span>$db_selecct</span>)
{
<span>die</span>(<span>"could not to the database"</span>.mysql_error());
}
<span>$query</span>=<span>"select * from eload_category "</span>;<span>//构建查询语句</span><span>$result</span>=mysql_query(<span>$query</span>);<span>//执行查询</span><span>if</span>(!<span>$result</span>)
{
<span>die</span>(<span>"could not to the database"</span>.mysql_error());
}

print_r(mysql_fetch_array(<span>$result</span>));</code>

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用mysql_query查询的结果并不能直接输出，会打印出Resource id #4。
用mysql_fetch_array转换成数组在输出

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