Home/ Manual/ mysqli / mysqli_stmt/ mysqli_stmt::bind_param

mysqli_stmt::bind_param

PHP function Edit on GitHub ✎

(PHP 5, PHP 7, PHP 8)

Binds variables to a prepared statement as parameters

Description

Oop

mysqli_stmt::bind_param(string $types, mixed $var, mixed ...$vars): bool

Procedural

mysqli_stmt_bind_param(mysqli_stmt $statement, string $types, mixed $var, mixed ...$vars): bool

Bind variables for the parameter markers in the SQL statement prepared by mysqli_prepare() or mysqli_stmt_prepare().

Note

If data size of a variable exceeds max. allowed packet size (max_allowed_packet), you have to specify b in types and use mysqli_stmt_send_long_data() to send the data in packets.

Note

Care must be taken when using mysqli_stmt_bind_param() in conjunction with call_user_func_array(). Note that mysqli_stmt_bind_param() requires parameters to be passed by reference, whereas call_user_func_array() can accept as a parameter a list of variables that can represent references or values.

Parameters

types

A string that contains one or more characters which specify the types for the corresponding bind variables:

Character	Description
i	corresponding variable has type `int`
d	corresponding variable has type `float`
s	corresponding variable has type `string`
b	corresponding variable is a blob and will be sent in packets

var

vars

The number of variables and length of string types must match the parameters in the statement.

Return Values

Success

Errors/Exceptions Conditionalexception

Examples

mysqli_stmt::bind_param example

Oop

php

<?php

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

$stmt = $mysqli->prepare("INSERT INTO CountryLanguage VALUES (?, ?, ?, ?)");
$stmt->bind_param('sssd', $code, $language, $official, $percent);

$code = 'DEU';
$language = 'Bavarian';
$official = "F";
$percent = 11.2;

$stmt->execute();

printf("%d row inserted.\n", $stmt->affected_rows);

/* Clean up table CountryLanguage */
$mysqli->query("DELETE FROM CountryLanguage WHERE Language='Bavarian'");
printf("%d row deleted.\n", $mysqli->affected_rows);

Procedural

php

<?php

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

$stmt = mysqli_prepare($link, "INSERT INTO CountryLanguage VALUES (?, ?, ?, ?)");
mysqli_stmt_bind_param($stmt, 'sssd', $code, $language, $official, $percent);

$code = 'DEU';
$language = 'Bavarian';
$official = "F";
$percent = 11.2;

mysqli_stmt_execute($stmt);

printf("%d row inserted.\n", mysqli_stmt_affected_rows($stmt));

/* Clean up table CountryLanguage */
mysqli_query($link, "DELETE FROM CountryLanguage WHERE Language='Bavarian'");
printf("%d row deleted.\n", mysqli_affected_rows($link));

Outputs

output

1 row inserted.
1 row deleted.

Using ... to provide arguments

The ... operator can be used to provide variable-length argument list, e.g. in a WHERE IN clause.

php

<?php

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

$stmt = $mysqli->prepare("SELECT Language FROM CountryLanguage WHERE CountryCode IN (?, ?)");
/* Using ... to provide arguments */
$stmt->bind_param('ss', ...['DEU', 'POL']);
$stmt->execute();
$stmt->store_result();

printf("%d rows found.\n", $stmt->num_rows());