MYSQLI_STMT_PREPARE(3)							 1						    MYSQLI_STMT_PREPARE(3)

mysqli_stmt::prepare - Prepare an SQL statement for execution

       Object oriented style

SYNOPSIS

       mixed mysqli_stmt::prepare (string  $query)

DESCRIPTION

       Procedural style
       bool mysqli_stmt_prepare (mysqli_stmt  $stmt, string  $query)

	Prepares the SQL query pointed to by the null-terminated string query.

	The parameter markers must be bound to application variables using mysqli_stmt_bind_param(3) and/or mysqli_stmt_bind_result(3) before exe-
       cuting the statement or fetching rows.

       Note

	       In the case where you pass a statement to mysqli_stmt_prepare(3) that is longer than max_allowed_packet of the server, the returned
	      error  codes  are  different  depending  on whether you are using MySQL Native Driver ( mysqlnd) or MySQL Client Library ( libmysql-
	      client). The behavior is as follows:

		     o mysqlnd on Linux returns an error code of 1153. The error message means got a packet bigger than max_allowed_packet bytes.

		     o mysqlnd on Windows returns an error code 2006. This error message means server has gone away.

		     o libmysqlclient on all platforms returns an error code 2006. This error message means server has gone away.

PARAMETERS

	      o $
		stmt -Procedural style only: A statement identifier returned by mysqli_stmt_init(3).

	      o $query
		- The query, as a string. It must consist of a single SQL statement.  You can include one or more parameter  markers  in  the  SQL
		statement by embedding question mark ( ?) characters at the appropriate positions.

	      Note

		      You should not add a terminating semicolon or g to the statement.

	      Note

		      The  markers  are  legal	only in certain places in SQL statements. For example, they are allowed in the VALUES() list of an
		     INSERT statement (to specify column values for a row), or in a comparison with a column in a WHERE clause to specify  a  com-
		     parison value.

		      However,	they are not allowed for identifiers (such as table or column names), in the select list that names the columns to
		     be returned by a SELECT statement), or to specify both operands of a binary operator such as the =  equal	sign.  The  latter
		     restriction  is  necessary  because  it would be impossible to determine the parameter type. In general, parameters are legal
		     only in Data Manipulation Language (DML) statements, and not in Data Definition Language (DDL) statements.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      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();
	      }

	      $city = "Amersfoort";

	      /* create a prepared statement */
	      $stmt =  $mysqli->stmt_init();
	      if ($stmt->prepare("SELECT District FROM City WHERE Name=?")) {

		  /* bind parameters for markers */
		  $stmt->bind_param("s", $city);

		  /* execute query */
		  $stmt->execute();

		  /* bind result variables */
		  $stmt->bind_result($district);

		  /* fetch value */
		  $stmt->fetch();

		  printf("%s is in district %s
", $city, $district);

		  /* close statement */
		  $stmt->close();
	      }

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

       Example #2

	      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();
	      }

	      $city = "Amersfoort";

	      /* create a prepared statement */
	      $stmt = mysqli_stmt_init($link);
	      if (mysqli_stmt_prepare($stmt, 'SELECT District FROM City WHERE Name=?')) {

		  /* bind parameters for markers */
		  mysqli_stmt_bind_param($stmt, "s", $city);

		  /* execute query */
		  mysqli_stmt_execute($stmt);

		  /* bind result variables */
		  mysqli_stmt_bind_result($stmt, $district);

		  /* fetch value */
		  mysqli_stmt_fetch($stmt);

		  printf("%s is in district %s
", $city, $district);

		  /* close statement */
		  mysqli_stmt_close($stmt);
	      }

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

	      The above examples will output:

	      Amersfoort is in district Utrecht

SEE ALSO

       mysqli_stmt_init(3),	mysqli_stmt_execute(3),     mysqli_stmt_fetch(3),      mysqli_stmt_bind_param(3),      mysqli_stmt_bind_result(3),
       mysqli_stmt_get_result(3), mysqli_stmt_close(3).

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