mysqli_stmt_fetch

(PHP 5)

mysqli_stmt_fetch

(no version information, might be only in CVS)

stmt->fetch --  Fetch results from a prepared statement into the bound variables

Description

Procedural style:

bool mysqli_stmt_fetch ( mysqli_stmt stmt )

Object oriented style (method):

class mysqli_stmt {

bool fetch ( void )

}

mysqli_stmt_fetch() fetch the result from a prepared statement into the variables bound by mysqli_stmt_bind_result().

Замечание: Note that all columns must be bound by the application before calling mysqli_stmt_fetch().

Возвращаемые значения

Таблица 1. Возвращаемые значения

ValueDescription
TRUESuccess. Data has been fetched
FALSEError occured
NULLNo more rows/data exists or data truncation occurred

Смотрите также

mysqli_prepare(), mysqli_stmt_errno(), mysqli_stmt_error() и mysqli_stmt_bind_result().

Примеры

Пример 1. Object oriented style

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

/* check connection */
if (mysqli_connect_errno()) {
   printf("Connect failed: %s\n", mysqli_connect_error());
   exit();
}
 
$query = "SELECT Name, CountryCode FROM City ORDER by ID DESC LIMIT 150,5";

if ($stmt = $mysqli->prepare($query)) {

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

   /* bind result variables */
   $stmt->bind_result($name, $code);

   /* fetch values */
   while ($stmt->fetch()) {
       printf ("%s (%s)\n", $name, $code);
   }

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

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

Пример 2. Procedural style

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

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

$query = "SELECT Name, CountryCode FROM City ORDER by ID DESC LIMIT 150,5";

if ($stmt = mysqli_prepare($link, $query)) {

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

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

   /* fetch values */
   while (mysqli_stmt_fetch($stmt)) {
       printf ("%s (%s)\n", $name, $code);
   }

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

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

Результат выполнения данного примера:

Rockford (USA)
Tallahassee (USA)
Salinas (USA)
Santa Clarita (USA)
Springfield (USA)


mysqli_stmt_fetch
andrey at php dot net
27-Apr-2005 11:37
IMPORTANT note: Be careful when you use this function with big result sets or with BLOB/TEXT columns. When one or more columns are of type (MEDIUM|LONG)(BLOB|TEXT) and ::store_result() was not called mysqli_stmt_fetch() will try to allocate at least 16MB for every such column. It _doesn't_ matter that the longest value in the result set is for example 30 bytes, 16MB will be allocated. Therefore it is not the best idea ot use binding of parameters whenever fetching big data. Why? Because once the data is in the mysql result set stored in memory and then second time in the PHP variable.

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 Last updated: Tue, 15 Nov 2005