Php/docs/function.db2-conn-error
db2_conn_error
(PECL ibm_db2 >= 1.0.0)
db2_conn_error — Returns a string containing the SQLSTATE returned by the last connection attempt
说明
db2_conn_error
([ resource $connection
] ) : string
db2_conn_error() returns an SQLSTATE value representing
the reason the last attempt to connect to a database failed. As
db2_connect() returns false in the event of a failed
connection attempt, you do not pass any parameters to
db2_conn_error() to retrieve the SQLSTATE value.
If, however, the connection was successful but becomes invalid over time,
you can pass the connection parameter to retrieve
the SQLSTATE value for a specific connection.
To learn what the SQLSTATE value means, you can issue the following command
at a DB2 Command Line Processor prompt:
db2 '? sqlstate-value'. You
can also call db2_conn_errormsg() to retrieve an
explicit error message and the associated SQLCODE value.
参数
connection- A connection resource associated with a connection that initially succeeded, but which over time became invalid.
返回值
Returns the SQLSTATE value resulting from a failed connection attempt. Returns an empty string if there is no error associated with the last connection attempt.
范例
Example #1 Retrieving an SQLSTATE value for a failed connection attempt
The following example demonstrates how to return an SQLSTATE value after deliberately passing invalid parameters to db2_connect().
<?php$conn = db2_connect('badname', 'baduser', 'badpassword');if (!$conn) { print "SQLSTATE value: " . db2_conn_error();}?>
以上例程会输出：
SQLSTATE value: 08001
参见
- db2_conn_errormsg() - Returns the last connection error message and SQLCODE value
- db2_connect() - Returns a connection to a database
- db2_stmt_error() - Returns a string containing the SQLSTATE returned by an SQL statement
- db2_stmt_errormsg() - Returns a string containing the last SQL statement error message
