The mysqli extension allows you to access the functionality provided by MySQL 4.1 and above. More information about the MySQL Database server can be found at http://www.mysql.com/
Documentation for MySQL can be found at http://www.mysql.com/documentation/.
| 警告 |
本扩展模块是实验性的。该模块的行为，包括其函数的名称以及其它任何关于此模块的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。我们提醒您在使用本扩展模块的同时自担风险。 |
In order to have these functions available, you must compile PHP with support for the mysqli extension.
注: The mysqli extension is designed to work with the version 4.1 or above of MySQL. For previous versions, please see the MySQL extension documentation.
To install the mysqli extension for PHP, use the --with-mysqli=mysql_config_path configuration option where mysql_config_path represents the location of the mysql_config program that comes with MySQL versions greater than 4.1. Also, disable the standard MySQL extension (which is enabled by default) by also using the --without-mysql configuration option. If you would like to install the standard mysql extension along with the mysqli extension, the bundled libmysql library that comes with PHP cannot be used. Instead, use the client libraries installed by MySQL with versions below 4.1. This will force PHP to use the client libraries installed by MySQL thus avoiding any conflicts.
这些函数的行为受到全局配置文件 php.ini 的影响。
表格 1. MySQLi Configuration Options
| Name | Default | Changeable |
|---|---|---|
| mysqli.max_links | "-1" | PHP_INI_SYSTEM |
| mysqli.default_port | NULL | PHP_INI_ALL |
| mysqli.default_socket | NULL | PHP_INI_ALL |
| mysqli.default_host | NULL | PHP_INI_ALL |
| mysqli.default_user | NULL | PHP_INI_ALL |
| mysqli.default_pw | NULL | PHP_INI_ALL |
For further details and definitions of the above PHP_INI_* constants, see the chapter on configuration changes.
以下是该配置选项的简要解释。
The maximum number of MySQL connections per process, including persistent connections.
The default TCP port number to use when connecting to the database server if no other port is specified. If no default is specified, the port will be obtained from the MYSQL_TCP_PORT environment variable, the mysql-tcp entry in /etc/services or the compile-time MYSQL_PORT constant, in that order. Win32 will only use the MYSQL_PORT constant.
The default socket name to use when connecting to a local database server if no other socket name is specified.
The default server host to use when connecting to the database server if no other host is specified. Doesn't apply in safe mode.
The default user name to use when connecting to the database server if no other name is specified. Doesn't apply in safe mode.
The default password to use when connecting to the database server if no other password is specified. Doesn't apply in safe mode.
表格 2. MySQLi Constants
| Name | Description |
|---|---|
| MYSQLI_READ_DEFAULT_GROUP (integer) | |
| MYSQLI_READ_DEFAULT_FILE (integer) | |
| MYSQLI_OPT_CONNECT_TIMEOUT (integer) | |
| MYSQLI_OPT_LOCAL_INFILE (integer) | |
| MYSQLI_INIT_COMMAND (integer) | |
| MYSQLI_CLIENT_SSL (integer) | |
| MYSQLI_CLIENT_COMPRESS (integer) | |
| MYSQLI_CLIENT_INTERACTIVE (integer) | |
| MYSQLI_CLIENT_IGNORE_SPACE (integer) | |
| MYSQLI_CLIENT_NO_SCHEMA (integer) | |
| MYSQLI_CLIENT_MULTI_QUERIES (integer) | |
| MYSQLI_STORE_RESULT (integer) | |
| MYSQLI_USE_RESULT (integer) | |
| MYSQLI_ASSOC (integer) | |
| MYSQLI_NUM (integer) | |
| MYSQLI_BOTH (integer) | |
| MYSQLI_NOT_NULL_FLAG (integer) | |
| MYSQLI_PRI_KEY_FLAG (integer) | |
| MYSQLI_UNIQUE_KEY_FLAG (integer) | |
| MYSQLI_MULTIPLE_KEY_FLAG (integer) | |
| MYSQLI_BLOB_FLAG (integer) | |
| MYSQLI_UNSIGNED_FLAG (integer) | |
| MYSQLI_ZEROFILL_FLAG (integer) | |
| MYSQLI_AUTO_INCREMENT_FLAG (integer) | |
| MYSQLI_TIMESTAMP_FLAG (integer) | |
| MYSQLI_SET_FLAG (integer) | |
| MYSQLI_NUM_FLAG (integer) | |
| MYSQLI_PART_KEY_FLAG (integer) | |
| MYSQLI_GROUP_FLAG (integer) | |
| MYSQLI_TYPE_DECIMAL (integer) | |
| MYSQLI_TYPE_TINY (integer) | |
| MYSQLI_TYPE_SHORT (integer) | |
| MYSQLI_TYPE_LONG (integer) | |
| MYSQLI_TYPE_FLOAD (integer) | |
| MYSQLI_TYPE_DOUBLE (integer) | |
| MYSQLI_TYPE_NULL (integer) | |
| MYSQLI_TYPE_TIMESTAMP (integer) | |
| MYSQLI_TYPE_LONGLONG (integer) | |
| MYSQLI_TYPE_INT24 (integer) | |
| MYSQLI_TYPE_DATE (integer) | |
| MYSQLI_TYPE_TIME (integer) | |
| MYSQLI_TYPE_DATETIME (integer) | |
| MYSQLI_TYPE_YEAR (integer) | |
| MYSQLI_TYPE_NEWDATE (integer) | |
| MYSQLI_TYPE_ENUM (integer) | |
| MYSQLI_TYPE_SET (integer) | |
| MYSQLI_TYPE_TINY_BLOB (integer) | |
| MYSQLI_TYPE_MEDIUM_BLOB (integer) | |
| MYSQLI_TYPE_LONG_BLOB (integer) | |
| MYSQLI_TYPE_BLOB (integer) | |
| MYSQLI_TYPE_VAR_STRING (integer) | |
| MYSQLI_TYPE_STRING (integer) | |
| MYSQLI_TYPE_CHAR (integer) | |
| MYSQLI_TYPE_INTERVAL (integer) | |
| MYSQLI_TYPE_GEOMETRY (integer) | |
| MYSQLI_BIND_STRING (integer) | |
| MYSQLI_BIND_INT (integer) | |
| MYSQLI_BIND_DOUBLE (integer) | |
| MYSQLI_BIND_SEND_DATA (integer) | |
| MYSQLI_RPL_MASTER (integer) | |
| MYSQLI_RPL_SLAVE (integer) | |
| MYSQLI_RPL_ADMIN (integer) | |
| MYSQLI_NEED_DATA (integer) | |
| MYSQLI_NO_DATA (integer) | |
| MYSQLI_PR_REPORT_STDERR (integer) | |
| MYSQLI_PR_REPORT_PORT (integer) | |
| MYSQLI_PR_REPORT_FILE (integer) |