mysqli_field_count(3) [php man page]

MYSQLI_FIELD_COUNT(3)							 1						     MYSQLI_FIELD_COUNT(3)

mysqli::$field_count - Returns the number of columns for the most recent query

       Object oriented style

SYNOPSIS

       int$mysqli->field_count ()

DESCRIPTION

       Procedural style
       int mysqli_field_count (mysqli  $link)

	Returns  the number of columns for the most recent query on the connection represented by the $link parameter. This function can be useful
       when using the mysqli_store_result(3) function to determine if the query should have produced a non-empty result set or not without knowing
       the nature of the query.

PARAMETERS

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

RETURN VALUES

	An integer representing the number of fields in a result set.

EXAMPLES

       Example #1

	      $mysqli->field_count example

	      Object oriented style

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

	      $mysqli->query( "DROP TABLE IF EXISTS friends");
	      $mysqli->query( "CREATE TABLE friends (id int, name varchar(20))");

	      $mysqli->query( "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");

	      $mysqli->real_query("SELECT * FROM friends");

	      if ($mysqli->field_count) {
		  /* this was a select/show or describe query */
		  $result = $mysqli->store_result();

		  /* process resultset */
		  $row = $result->fetch_row();

		  /* free resultset */
		  $result->close();
	      }

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

	      Procedural style

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

	      mysqli_query($link, "DROP TABLE IF EXISTS friends");
	      mysqli_query($link, "CREATE TABLE friends (id int, name varchar(20))");

	      mysqli_query($link, "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");

	      mysqli_real_query($link, "SELECT * FROM friends");

	      if (mysqli_field_count($link)) {
		  /* this was a select/show or describe query */
		  $result = mysqli_store_result($link);

		  /* process resultset */
		  $row = mysqli_fetch_row($result);

		  /* free resultset */
		  mysqli_free_result($result);
	      }

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

PHP Documentation Group 												     MYSQLI_FIELD_COUNT(3)

MYSQLI_AFFECTED_ROWS(3) 						 1						   MYSQLI_AFFECTED_ROWS(3)

mysqli::$affected_rows - Gets the number of affected rows in a previous MySQL operation

       Object oriented style

SYNOPSIS

       int$mysqli->affected_rows ()

DESCRIPTION

       Procedural style
       int mysqli_affected_rows (mysqli  $link)

	Returns the number of rows affected by the last INSERT, UPDATE, REPLACE or DELETE query.

	For SELECT statements mysqli_affected_rows(3) works like mysqli_num_rows(3).

PARAMETERS

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

RETURN VALUES

	An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records were updated for an UPDATE
       statement, no rows matched the WHERE clause in the query or that no query has yet been executed. -1 indicates that the  query  returned	an
       error.

       Note

	       If the number of affected rows is greater than the maximum integer value(
	       PHP_INT_MAX ), the number of affected rows will be returned as a string.

EXAMPLES

       Example #1

	      $mysqli->affected_rows 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();
	      }

	      /* Insert rows */
	      $mysqli->query("CREATE TABLE Language SELECT * from CountryLanguage");
	      printf("Affected rows (INSERT): %d
", $mysqli->affected_rows);

	      $mysqli->query("ALTER TABLE Language ADD Status int default 0");

	      /* update rows */
	      $mysqli->query("UPDATE Language SET Status=1 WHERE Percentage > 50");
	      printf("Affected rows (UPDATE): %d
", $mysqli->affected_rows);

	      /* delete rows */
	      $mysqli->query("DELETE FROM Language WHERE Percentage < 50");
	      printf("Affected rows (DELETE): %d
", $mysqli->affected_rows);

	      /* select all rows */
	      $result = $mysqli->query("SELECT CountryCode FROM Language");
	      printf("Affected rows (SELECT): %d
", $mysqli->affected_rows);

	      $result->close();

	      /* Delete table Language */
	      $mysqli->query("DROP TABLE Language");

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

	      Procedural style

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

	      if (!$link) {
		  printf("Can't connect to localhost. Error: %s
", mysqli_connect_error());
		  exit();
	      }

	      /* Insert rows */
	      mysqli_query($link, "CREATE TABLE Language SELECT * from CountryLanguage");
	      printf("Affected rows (INSERT): %d
", mysqli_affected_rows($link));

	      mysqli_query($link, "ALTER TABLE Language ADD Status int default 0");

	      /* update rows */
	      mysqli_query($link, "UPDATE Language SET Status=1 WHERE Percentage > 50");
	      printf("Affected rows (UPDATE): %d
", mysqli_affected_rows($link));

	      /* delete rows */
	      mysqli_query($link, "DELETE FROM Language WHERE Percentage < 50");
	      printf("Affected rows (DELETE): %d
", mysqli_affected_rows($link));

	      /* select all rows */
	      $result = mysqli_query($link, "SELECT CountryCode FROM Language");
	      printf("Affected rows (SELECT): %d
", mysqli_affected_rows($link));

	      mysqli_free_result($result);

	      /* Delete table Language */
	      mysqli_query($link, "DROP TABLE Language");

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

	      The above examples will output:

	      Affected rows (INSERT): 984
	      Affected rows (UPDATE): 168
	      Affected rows (DELETE): 815
	      Affected rows (SELECT): 169

SEE ALSO

       mysqli_num_rows(3), mysqli_info(3).

PHP Documentation Group 												   MYSQLI_AFFECTED_ROWS(3)