php man page for mysqli_error

MYSQLI_ERROR(3) 							 1							   MYSQLI_ERROR(3)

mysqli::$error - Returns a string description of the last error

       Object oriented style

SYNOPSIS
       string$mysqli->error ()

DESCRIPTION
       Procedural style
       string mysqli_error (mysqli  $link)

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

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

RETURN VALUES
	A string that describes the error. An empty string if no error occurred.

EXAMPLES
       Example #1

	      $mysqli->error 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("Errormessage: %s
", $mysqli->error);
	      }

	      /* 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($link, "SET a=1")) {
		  printf("Errormessage: %s
", mysqli_error($link));
	      }

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

	      The above examples will output:

	      Errormessage: Unknown system variable 'a'

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

PHP Documentation Group 													   MYSQLI_ERROR(3)