mysqli_stmt::bind_result

mysqli_stmt_bind_result

(PHP 5, PHP 7, PHP 8)

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 $statement, mixed &$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.

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.

注意:

All columns must be bound after mysqli_stmt_execute() and prior to calling mysqli_stmt_fetch().

注意:

Depending on column types bound variables can silently change to the corresponding PHP type.

小技巧

This function is useful for simple results. To retrieve iterable result set, or fetch each row as an array or object, use mysqli_stmt_get_result().

参数

statement

仅以过程化样式：由 mysqli_stmt_init() 返回的 mysqli_stmt 对象。

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。

示例

示例 #1 面向对象风格

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* prepare statement */
$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);
}

示例 #2 过程化风格

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* prepare statement */
$stmt = mysqli_prepare($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);
}

以上示例的输出类似于：

AFG Afghanistan
ALB Albania
DZA Algeria
ASM American Samoa
AND Andorra

参见