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(PHP 5)

mysqli->connect_errno -- mysqli_connect_errnoReturns the error code from last connect call


Oriented object style

string $connect_errno;

Procedural style

int mysqli::mysqli_connect_errno ( void )

Returns the last error code number from the last call to mysqli_connect().


Client error message numbers are listed in the MySQL errmsg.h header file, server error message numbers are listed in mysqld_error.h. In the MySQL source distribution you can find a complete list of error messages and error numbers in the file Docs/mysqld_error.txt.

Return Values

An error code value for the last call to mysqli_connect(), if it failed. zero means no error occurred.


Example #1 mysqli->connect_errno example

Oriented object style

= @new mysqli('localhost''fake_user''my_password''my_db');

if (
$mysqli->connect_errno) {
'Connect Error: ' $mysqli->connect_errno);

Procedural style

= @mysqli_connect('localhost''fake_user''my_password''my_db');

if (!
$link) {
'Connect Error: ' mysqli_connect_errno());

The above examples will output:

Connect Error: 1045

See Also

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User Contributed Notes 1 note

Daro AP
1 year ago
'errmsg.h' and 'mysqld_error.h' files only have the definitions of the error codes. In the MySQL documentation you can find the definition along with the message it displays, which could be more useful since the error constant name isn't always explicit enough.

Client Error Codes and Messages

Server Error Codes and Messages
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