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mysqli_stmt::attr_set -- mysqli_stmt_attr_setUsed to modify the behavior of a prepared statement



public mysqli_stmt::attr_set(int $attribute, int $value): bool


mysqli_stmt_attr_set(mysqli_stmt $statement, int $attribute, int $value): bool

Used to modify the behavior of a prepared statement. This function may be called multiple times to set several attributes.



仅以过程化样式:由 mysqli_stmt_init() 返回的 mysqli_stmt 对象。


The attribute that you want to set. It can have one of the following values:

Attribute values
Character Description
MYSQLI_STMT_ATTR_UPDATE_MAX_LENGTH Setting to true causes mysqli_stmt_store_result() to update the metadata MYSQL_FIELD->max_length value.
MYSQLI_STMT_ATTR_CURSOR_TYPE Type of cursor to open for statement when mysqli_stmt_execute() is invoked. value can be MYSQLI_CURSOR_TYPE_NO_CURSOR (the default) or MYSQLI_CURSOR_TYPE_READ_ONLY.
MYSQLI_STMT_ATTR_PREFETCH_ROWS Number of rows to fetch from server at a time when using a cursor. value can be in the range from 1 to the maximum value of unsigned long. The default is 1.

If you use the MYSQLI_STMT_ATTR_CURSOR_TYPE option with MYSQLI_CURSOR_TYPE_READ_ONLY, a cursor is opened for the statement when you invoke mysqli_stmt_execute(). If there is already an open cursor from a previous mysqli_stmt_execute() call, it closes the cursor before opening a new one. mysqli_stmt_reset() also closes any open cursor before preparing the statement for re-execution. mysqli_stmt_free_result() closes any open cursor.

If you open a cursor for a prepared statement, mysqli_stmt_store_result() is unnecessary.


The value to assign to the attribute.


成功时返回 true, 或者在失败时返回 false


If mysqli error reporting is enabled (MYSQLI_REPORT_ERROR) and the requested operation fails, a warning is generated. If, in addition, the mode is set to MYSQLI_REPORT_STRICT, a mysqli_sql_exception is thrown instead.

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User Contributed Notes 1 note

chad 0x40 digitellinc 0x2e com
16 years ago
This is basically a wrapper for mysql_stmt_attr_set in the MySQL C API:
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