Php/docs/mysqli-stmt.bind-result

• PHP Manual
• MySQLi_STMT
• Binds variables to a prepared statement for result storage

mysqli_stmt::bind_result

mysqli_stmt_bind_result

(PHP 5, PHP 7)

mysqli_stmt::bind_result -- mysqli_stmt_bind_result — Binds variables to a prepared statement for result storage

说明

面向对象风格

public mysqli_stmt::bind_result ( mixed &$var , mixed &...$vars ) : bool

过程化风格

mysqli_stmt_bind_result ( mysqli_stmt $stmt , mixed &$var , mixed &...$vars ) : bool

Binds columns in the result set to variables.

When mysqli_stmt_fetch() is called to fetch data, the MySQL client/server protocol places the data for the bound columns into the specified variables var/vars.

Note:

Note that all columns must be bound after mysqli_stmt_execute() and prior to calling mysqli_stmt_fetch(). Depending on column types bound variables can silently change to the corresponding PHP type.

A column can be bound or rebound at any time, even after a result set has been partially retrieved. The new binding takes effect the next time mysqli_stmt_fetch() is called.

参数

stmt

仅以过程化样式：由 mysqli_stmt_init() 返回的 statement 标识。

var

The first variable to be bound.

vars

Further variables to be bound.

返回值

成功时返回 true， 或者在失败时返回 false。

范例

Example #1 面向对象风格

<?php$mysqli = new mysqli("localhost", "my_user", "my_password", "world");if (mysqli_connect_errno()) {    printf("Connect failed: %s\n", mysqli_connect_error());    exit();}/* prepare statement */if ($stmt = $mysqli->prepare("SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) {    $stmt->execute();    /* bind variables to prepared statement */    $stmt->bind_result($col1, $col2);    /* fetch values */    while ($stmt->fetch()) {        printf("%s %s\n", $col1, $col2);    }    /* close statement */    $stmt->close();}/* close connection */$mysqli->close();?>

Example #2 过程化风格

<?php$link = mysqli_connect("localhost", "my_user", "my_password", "world");/* check connection */if (!$link) {    printf("Connect failed: %s\n", mysqli_connect_error());    exit();}/* prepare statement */if ($stmt = mysqli_prepare($link, "SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) {    mysqli_stmt_execute($stmt);    /* bind variables to prepared statement */    mysqli_stmt_bind_result($stmt, $col1, $col2);    /* fetch values */    while (mysqli_stmt_fetch($stmt)) {        printf("%s %s\n", $col1, $col2);    }    /* close statement */    mysqli_stmt_close($stmt);}/* close connection */mysqli_close($link);?>

以上例程会输出：

AFG Afghanistan
ALB Albania
DZA Algeria
ASM American Samoa
AND Andorra

参见

• mysqli_stmt_get_result() - Gets a result set from a prepared statement
• mysqli_stmt_bind_param() - Binds variables to a prepared statement as parameters
• mysqli_stmt_execute() - Executes a prepared Query
• mysqli_stmt_fetch() - Fetch results from a prepared statement into the bound variables
• mysqli_prepare() - 准备执行一个 SQL 语句
• mysqli_stmt_prepare() - Prepare an SQL statement for execution
• mysqli_stmt_init() - 初始化一条语句并返回一个用于mysqli_stmt_prepare(调用)的对象
• mysqli_stmt_errno() - Returns the error code for the most recent statement call
• mysqli_stmt_error() - Returns a string description for last statement error