php 中 mysqli 是个类，这个类的函数（方法）有：
成都创新互联专注于企业网络营销推广、网站重做改版、柯桥网站定制设计、自适应品牌网站建设、H5场景定制、成都商城网站开发、集团公司官网建设、外贸网站建设、高端网站制作、响应式网页设计等建站业务，价格优惠性价比高，为柯桥等各大城市提供网站开发制作服务。
mysqli::$affected_rows — Gets the number of affected rows in a previous MySQL operation
mysqli::autocommit — 打开或关闭本次数据库连接的自动命令提交事务模式
mysqli::begin_transaction — Starts a transaction
mysqli::change_user — Changes the user of the specified database connection
mysqli::character_set_name — 返回当前数据库连接的默认字符编码
mysqli::$client_info — Get MySQL client info
mysqli::$client_version — Returns the MySQL client version as a string
mysqli::close — 关闭先前打开的数据库连接
mysqli::commit — 提交一个事务
mysqli::$connect_errno — Returns the error code from last connect call
mysqli::$connect_error — Returns a string description of the last connect error
mysqli::__construct — Open a new connection to the MySQL server
mysqli::debug — Performs debugging operations
mysqli::dump_debug_info — 将调试信息输出到日志
mysqli::errno — 返回最近函数调用的错误代码
mysqli::$error_list — Returns a list of errors from the last command executed
mysqli::$error — Returns a string description of the last error
mysqli::$field_count — Returns the number of columns for the most recent query
mysqli::get_charset — Returns a character set object
mysqli::get_client_info — Get MySQL client info
mysqli_get_client_stats — Returns client per-process statistics
mysqli_get_client_version — 作为一个整数返回MySQL客户端的版本
mysqli::get_connection_stats — Returns statistics about the client connection
mysqli::$host_info — 返回一个表述使用的连接类型的字符串
mysqli::$protocol_version — 返回MySQL使用的协议版本号
mysqli::$server_info — 返回MySQL服务器的版本号
mysqli::$server_version — 作为一个整数返回MySQL服务器的版本
mysqli::get_warnings — Get result of SHOW WARNINGS
mysqli::$info — Retrieves information about the most recently executed query
mysqli::init — Initializes MySQLi and returns a resource for use with mysqli_real_connect()
mysqli::$insert_id — Returns the auto generated id used in the last query
mysqli::kill — Asks the server to kill a MySQL thread
mysqli::more_results — Check if there are any more query results from a multi query
mysqli::multi_query — Performs a query on the database
mysqli::next_result — Prepare next result from multi_query
mysqli::options — Set options
mysqli::ping — Pings a server connection, or tries to reconnect if the connection has gone down
mysqli::poll — Poll connections
mysqli::prepare — Prepare an SQL statement for execution
mysqli::query — 对数据库执行一次查询
mysqli::real_connect — 建立一个 MySQL 服务器连接
mysqli::real_escape_string — Escapes special characters in a string for use in an SQL statement, taking into account the current charset of the connection
mysqli::real_query — 执行一个mysql查询
mysqli::reap_async_query — Get result from async query
mysqli::refresh — Refreshes
mysqli::release_savepoint — Removes the named savepoint from the set of savepoints of the current transaction
mysqli::rollback — 回退当前事务
mysqli::rpl_query_type — Returns RPL query type
mysqli::savepoint — Set a named transaction savepoint
mysqli::select_db — 选择用于数据库查询的默认数据库
mysqli::send_query — 发送请求并返回结果
mysqli::set_charset — 设置默认字符编码
mysqli::set_local_infile_default — Unsets user defined handler for load local infile command
mysqli::set_local_infile_handler — Set callback function for LOAD DATA LOCAL INFILE command
mysqli::$sqlstate — Returns the SQLSTATE error from previous MySQL operation
mysqli::ssl_set — Used for establishing secure connections using SSL
mysqli::stat — Gets the current system status
mysqli::stmt_init — 初始化一条语句并返回一个用于mysqli_stmt_prepare(调用)的对象
mysqli::store_result — Transfers a result set from the last query
mysqli::$thread_id — Returns the thread ID for the current connection
mysqli::thread_safe — 返回是否是线程安全的
mysqli::use_result — Initiate a result set retrieval
mysqli::$warning_count — Returns the number of warnings from the last query for the given link
以上函数清单直接来自 网站。你可以进入该网站参看。
常用函数比较多
如：字符串处理函数，数组函数，日期函数，MySQL函数，文件系统函数，GD函数库等
1、PHP获取显示数据库数据函数之 mysql_result()
mixed mysql_result(resource result_set, int row [,mixed field])
从result_set 的指定row 中获取一个field 的数据. 简单但是效率低.
举例:
$link1 = @mysql_connect("server1",
"webuser", "password")
or die("Could not connect
to mysql server!");
@mysql_select_db("company")
or die("Could not select database!");
$query = "select id, name
from product order by name";
$result = mysql_query($query);
$id = mysql_result($result, 0, "id");
$name = mysql_result($result, 0, "name");
mysql_close();
注意,上述代码只是输出结果集中的第一条数据的字段值,如果要输出所有记录,需要循环处理.
for ($i = 0; $i = mysql_num_rows($result); $i++)
{
$id = mysql_result($result, 0, "id");
$name = mysql_result($result, 0, "name");
echo "Product: $name ($id)";
}
注意,如果查询字段名是别名,则mysql_result中就使用别名.
2、PHP获取显示数据库数据函数之mysql_fetch_row()
array mysql_fetch_row(resource result_set)
从result_set中获取整行,把数据放入数组中.
举例(注意和list 的巧妙配合):
$query = "select id,
name from product order by name";
$result = mysql_query($query);
while(list($id, $name)
= mysql_fetch_row($result)) {
echo "Product: $name ($id)";
}
3、PHP获取显示数据库数据函数之mysql_fetch_array()
array mysql_fetch_array(resource result_set [,int result_type])
mysql_fetch_row()的增强版.
将result_set的每一行获取为一个关联数组或/和数值索引数组.
默认获取两种数组,result_type可以设置:
MYSQL_ASSOC:返回关联数组,字段名=字段值
MYSQL_NUM:返回数值索引数组.
MYSQL_BOTH:获取两种数组.因此每个字段可以按索引偏移引用,也可以按字段名引用.
举例:
$query = "select id,
name from product order by name";
$result = mysql_query($query);
while($row = mysql_fetch_array
($result, MYSQL_BOTH)) {
$name = $row['name'];
//或者 $name = $row[1];
$name = $row['id'];
//或者 $name = $row[0];
echo "Product: $name ($id)";
}
4、PHP获取显示数据库数据函数之mysql_fetch_assoc()
array mysql_fetch_assoc(resource result_set)
相当于 mysql_fetch_array($result, MYSQL_ASSOC)
5、PHP获取显示数据库数据函数之mysql_fetch_object()
object mysql_fetch_object(resource result_set)
和mysql_fetch_array()功能一样,不过返回的不是数组,而是一个对象.
举例:
$query = "select id, name
from product order by name";
$result = mysql_query($query);
while($row = mysql_fetch_object
($result)) {
$name = $row-name;
$name = $row-id;
echo "Product: $name ($id)";
}
以上这些函数就是PHP获取显示数据库数据函数的全部总结。
