&reftitle.constants; &extension.constants;

`MYSQLI_READ_DEFAULT_GROUP` (`int`)

- Read options from the named group from `my.cnf` or the file specified with `MYSQLI_READ_DEFAULT_FILE`

`MYSQLI_READ_DEFAULT_FILE` (`int`)

- Read options from the named option file instead of from `my.cnf`

`MYSQLI_OPT_CONNECT_TIMEOUT` (`int`)

- Connect timeout in seconds

`MYSQLI_OPT_READ_TIMEOUT` (`int`)

- Command execution result timeout in seconds. Available as of PHP 7.2.0.

`MYSQLI_OPT_LOCAL_INFILE` (`int`)

- Enables command `LOAD LOCAL INFILE`

`MYSQLI_OPT_INT_AND_FLOAT_NATIVE` (`int`)

- Convert integer and float columns back to PHP numbers. Only valid for mysqlnd.

`MYSQLI_OPT_NET_CMD_BUFFER_SIZE` (`int`)

- The size of the internal command/network buffer. Only valid for mysqlnd.

`MYSQLI_OPT_NET_READ_BUFFER_SIZE` (`int`)

- Maximum read chunk size in bytes when reading the body of a MySQL command packet. Only valid for mysqlnd.

`MYSQLI_OPT_SSL_VERIFY_SERVER_CERT` (`int`)

- Requires MySQL 5.1.10 and up

`MYSQLI_INIT_COMMAND` (`int`)

- Command to execute when connecting to MySQL server. Will automatically be re-executed when reconnecting.

`MYSQLI_CLIENT_SSL` (`int`)

- Use SSL (encrypted protocol). This option should not be set by application programs; it is set internally in the MySQL client library

`MYSQLI_CLIENT_COMPRESS` (`int`)

- Use compression protocol

`MYSQLI_CLIENT_INTERACTIVE` (`int`)

- Allow `interactive_timeout` seconds (instead of `wait_timeout` seconds) of inactivity before closing the connection. The client's session `wait_timeout` variable will be set to the value of the session `interactive_timeout` variable.

`MYSQLI_CLIENT_IGNORE_SPACE` (`int`)

- Allow spaces after function names. Makes all functions names reserved words.

`MYSQLI_CLIENT_NO_SCHEMA` (`int`)

- Don't allow the `db_name.tbl_name.col_name` syntax.

`MYSQLI_CLIENT_MULTI_QUERIES`

- Allows multiple semicolon-delimited queries in a single `mysqli_query` call.

`MYSQLI_STORE_RESULT` (`int`)

- For using buffered result sets. It has a value of `0`.

`MYSQLI_USE_RESULT` (`int`)

- For using unbuffered result sets. It has a value of `1`.

`MYSQLI_ASSOC` (`int`)

- Columns are returned into the array having the fieldname as the array index.

`MYSQLI_NUM` (`int`)

- Columns are returned into the array having an enumerated index.

`MYSQLI_BOTH` (`int`)

- Columns are returned into the array having both a numerical index and the fieldname as the associative index.

`MYSQLI_NOT_NULL_FLAG` (`int`)

- Indicates that a field is defined as `NOT NULL`

`MYSQLI_PRI_KEY_FLAG` (`int`)

- Field is part of a primary index

`MYSQLI_UNIQUE_KEY_FLAG` (`int`)

- Field is part of a unique index.

`MYSQLI_MULTIPLE_KEY_FLAG` (`int`)

- Field is part of an index.

`MYSQLI_BLOB_FLAG` (`int`)

- Field is defined as `BLOB`

`MYSQLI_UNSIGNED_FLAG` (`int`)

- Field is defined as `UNSIGNED`

`MYSQLI_ZEROFILL_FLAG` (`int`)

- Field is defined as `ZEROFILL`

`MYSQLI_AUTO_INCREMENT_FLAG` (`int`)

- Field is defined as `AUTO_INCREMENT`

`MYSQLI_TIMESTAMP_FLAG` (`int`)

- Field is defined as `TIMESTAMP`

`MYSQLI_SET_FLAG` (`int`)

- Field is defined as `SET`

`MYSQLI_NUM_FLAG` (`int`)

- Field is defined as `NUMERIC`

`MYSQLI_PART_KEY_FLAG` (`int`)

- Field is part of an multi-index

`MYSQLI_GROUP_FLAG` (`int`)

- Field is part of `GROUP BY`

`MYSQLI_TYPE_DECIMAL` (`int`)

- Field is defined as `DECIMAL`

`MYSQLI_TYPE_NEWDECIMAL` (`int`)

- Precision math `DECIMAL` or `NUMERIC` field (MySQL 5.0.3 and up)

`MYSQLI_TYPE_BIT` (`int`)

- Field is defined as `BIT` (MySQL 5.0.3 and up)

`MYSQLI_TYPE_TINY` (`int`)

- Field is defined as `TINYINT`

`MYSQLI_TYPE_SHORT` (`int`)

- Field is defined as `SMALLINT`

`MYSQLI_TYPE_LONG` (`int`)

- Field is defined as `INT`

`MYSQLI_TYPE_FLOAT` (`int`)

- Field is defined as `FLOAT`

`MYSQLI_TYPE_DOUBLE` (`int`)

- Field is defined as `DOUBLE`

`MYSQLI_TYPE_NULL` (`int`)

- Field is defined as `DEFAULT NULL`

`MYSQLI_TYPE_TIMESTAMP` (`int`)

- Field is defined as `TIMESTAMP`

`MYSQLI_TYPE_LONGLONG` (`int`)

- Field is defined as `BIGINT`

`MYSQLI_TYPE_INT24` (`int`)

- Field is defined as `MEDIUMINT`

`MYSQLI_TYPE_DATE` (`int`)

- Field is defined as `DATE`

`MYSQLI_TYPE_TIME` (`int`)

- Field is defined as `TIME`

`MYSQLI_TYPE_DATETIME` (`int`)

- Field is defined as `DATETIME`

`MYSQLI_TYPE_YEAR` (`int`)

- Field is defined as `YEAR`

`MYSQLI_TYPE_NEWDATE` (`int`)

- Field is defined as `DATE`

`MYSQLI_TYPE_INTERVAL` (`int`)

- Field is defined as `INTERVAL`

`MYSQLI_TYPE_ENUM` (`int`)

- Field is defined as `ENUM`

`MYSQLI_TYPE_SET` (`int`)

- Field is defined as `SET`

`MYSQLI_TYPE_TINY_BLOB` (`int`)

- Field is defined as `TINYBLOB`

`MYSQLI_TYPE_MEDIUM_BLOB` (`int`)

- Field is defined as `MEDIUMBLOB`

`MYSQLI_TYPE_LONG_BLOB` (`int`)

- Field is defined as `LONGBLOB`

`MYSQLI_TYPE_BLOB` (`int`)

- Field is defined as `BLOB`

`MYSQLI_TYPE_VAR_STRING` (`int`)

- Field is defined as `VARCHAR`

`MYSQLI_TYPE_STRING` (`int`)

- Field is defined as `CHAR` or `BINARY`

`MYSQLI_TYPE_CHAR` (`int`)

- Field is defined as `TINYINT`. For `CHAR`, see `MYSQLI_TYPE_STRING`

`MYSQLI_TYPE_GEOMETRY` (`int`)

- Field is defined as `GEOMETRY`

`MYSQLI_TYPE_JSON` (`int`)

- Field is defined as `JSON`. Only valid for mysqlnd and MySQL 5.7.8 and up.

`MYSQLI_NEED_DATA`

- More data available for bind variable

`MYSQLI_NO_DATA` (`int`)

- No more data available for bind variable

`MYSQLI_DATA_TRUNCATED` (`int`)

- Data truncation occurred. Available since MySQL 5.0.5.

`MYSQLI_ENUM_FLAG` (`int`)

- Field is defined as `ENUM`.

`MYSQLI_BINARY_FLAG` (`int`)

- Field is defined as `BINARY`.

`MYSQLI_CURSOR_TYPE_FOR_UPDATE` (`int`)

`MYSQLI_CURSOR_TYPE_NO_CURSOR` (`int`)

`MYSQLI_CURSOR_TYPE_READ_ONLY` (`int`)

`MYSQLI_CURSOR_TYPE_SCROLLABLE` (`int`)

`MYSQLI_STMT_ATTR_CURSOR_TYPE` (`int`)

`MYSQLI_STMT_ATTR_PREFETCH_ROWS` (`int`)

`MYSQLI_STMT_ATTR_UPDATE_MAX_LENGTH` (`int`)

`MYSQLI_SET_CHARSET_NAME` (`int`)

`MYSQLI_REPORT_INDEX` (`int`)

- Report if no index or bad index was used in a query.

`MYSQLI_REPORT_ERROR` (`int`)

- Report errors from mysqli function calls.

`MYSQLI_REPORT_STRICT` (`int`)

- Throw a `mysqli_sql_exception` for errors instead of warnings.

`MYSQLI_REPORT_ALL` (`int`)

- Set all options on (report all).

`MYSQLI_REPORT_OFF` (`int`)

- Turns reporting off.

`MYSQLI_DEBUG_TRACE_ENABLED` (`int`)

- Is set to 1 if `mysqli_debug` functionality is enabled.

`MYSQLI_SERVER_QUERY_NO_GOOD_INDEX_USED` (`int`)

`MYSQLI_SERVER_QUERY_NO_INDEX_USED` (`int`)

`MYSQLI_SERVER_PUBLIC_KEY` (`int`)

`MYSQLI_REFRESH_GRANT` (`int`)

- Refreshes the grant tables.

`MYSQLI_REFRESH_LOG` (`int`)

- Flushes the logs, like executing the `FLUSH LOGS` SQL statement.

`MYSQLI_REFRESH_TABLES` (`int`)

- Flushes the table cache, like executing the `FLUSH TABLES` SQL statement.

`MYSQLI_REFRESH_HOSTS` (`int`)

- Flushes the host cache, like executing the `FLUSH HOSTS` SQL statement.

`MYSQLI_REFRESH_REPLICA` (`int`)

- Alias of `MYSQLI_REFRESH_SLAVE` constant. Available as of PHP 8.1.0.

`MYSQLI_REFRESH_STATUS` (`int`)

- Reset the status variables, like executing the `FLUSH STATUS` SQL statement.

`MYSQLI_REFRESH_THREADS` (`int`)

- Flushes the thread cache.

`MYSQLI_REFRESH_SLAVE` (`int`)

- On a slave replication server: resets the master server information, and restarts the slave. Like executing the `RESET SLAVE` SQL statement.

`MYSQLI_REFRESH_MASTER` (`int`)

- On a master replication server: removes the binary log files listed in the binary log index, and truncates the index file. Like executing the `RESET MASTER` SQL statement.

`MYSQLI_TRANS_COR_AND_CHAIN` (`int`)

- Appends "AND CHAIN" to `mysqli_commit` or `mysqli_rollback`.

`MYSQLI_TRANS_COR_AND_NO_CHAIN` (`int`)

- Appends "AND NO CHAIN" to `mysqli_commit` or `mysqli_rollback`.

`MYSQLI_TRANS_COR_RELEASE` (`int`)

- Appends "RELEASE" to `mysqli_commit` or `mysqli_rollback`.

`MYSQLI_TRANS_COR_NO_RELEASE` (`int`)

- Appends "NO RELEASE" to `mysqli_commit` or `mysqli_rollback`.

`MYSQLI_TRANS_START_READ_ONLY` (`int`)

- Start the transaction as "START TRANSACTION READ ONLY" with `mysqli_begin_transaction`.

`MYSQLI_TRANS_START_READ_WRITE` (`int`)

- Start the transaction as "START TRANSACTION READ WRITE" with `mysqli_begin_transaction`.

`MYSQLI_TRANS_START_CONSISTENT_SNAPSHOT`

- Start the transaction as "START TRANSACTION WITH CONSISTENT SNAPSHOT" with `mysqli_begin_transaction`.

`MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT` (`int`)

- Requires MySQL 5.6.5 and up.

`MYSQLI_IS_MARIADB` (`bool`)

- Whether the mysqli extension has been built against a MariaDB client library. Available as of PHP 8.1.2.