php man page for mysqli_errno

MYSQLI_ERRNO(3) 							 1							   MYSQLI_ERRNO(3)

mysqli::$errno - Returns the error code for the most recent function call

       Object oriented style

SYNOPSIS
       int$mysqli->errno ()

DESCRIPTION
       Procedural style
       int mysqli_errno (mysqli  $link)

	Returns the last error code for the most recent MySQLi function call that can succeed or fail.

	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.

PARAMETERS
	      o $
		link -Procedural style only: A link identifier returned by mysqli_connect(3) or mysqli_init(3)

RETURN VALUES
	An error code value for the last call, if it failed. zero means no error occurred.

EXAMPLES
       Example #1

	      $mysqli->errno example

	      Object oriented style

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

	      /* check connection */
	      if ($mysqli->connect_errno) {
		  printf("Connect failed: %s
", $mysqli->connect_error);
		  exit();
	      }

	      if (!$mysqli->query("SET a=1")) {
		  printf("Errorcode: %d
", $mysqli->errno);
	      }

	      /* close connection */
	      $mysqli->close();
	      ?>

	      Procedural style

	      <?php
	      $link = mysqli_connect("localhost", "my_user", "my_password", "world");

	      /* check connection */
	      if (mysqli_connect_errno()) {
		  printf("Connect failed: %s
", mysqli_connect_error());
		  exit();
	      }

	      if (!mysqli_query($link, "SET a=1")) {
		  printf("Errorcode: %d
", mysqli_errno($link));
	      }

	      /* close connection */
	      mysqli_close($link);
	      ?>

	      The above examples will output:

	      Errorcode: 1193

SEE ALSO
       mysqli_connect_errno(3), mysqli_connect_error(3), mysqli_error(3), mysqli_sqlstate(3).

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