mysqli::$connect_errno

Definition and usage

connect_errno / mysqli_connect_errno() function returns the error code for the last connection error (if any).

Example

Example 1 - Object-Oriented Style

Returns the error code for the last connection error (if any):

 <?php
$mysqli = new mysqli ( "localhost" , "my_user" , "my_password" , "my_db" ) ;

// Check the connection
if ( $mysqli -> connect_errno ) {
  echo "Failed to connect to MySQL: " . $mysqli -> connect_error ;
  exit ( ) ;
}
?>

Example 2 - Procedural Style

Returns the error code for the last connection error (if any):

 <?php
$con = mysqli_connect ( "localhost" , "my_user" , "my_password" , "my_db" ) ;

// Check the connection
if ( mysqli_connect_errno ( ) ) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error ( ) ;
  exit ( ) ;
}
?>