update : 2015.11.03
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Return the number of rows in statements result set
mysqli_stmt
PHP Manual

mysqli_stmt::$num_rows

mysqli_stmt_num_rows

(PHP 5)

mysqli_stmt::$num_rows -- mysqli_stmt_num_rows — Return the number of rows in statements result set

설명

객체 기반 형식

int $mysqli_stmt->num_rows;

절차식 형식

int mysqli_stmt_num_rows ( mysqli_stmt $stmt )

Returns the number of rows in the result set. The use of mysqli_stmt_num_rows() depends on whether or not you used mysqli_stmt_store_result() to buffer the entire result set in the statement handle.

If you use mysqli_stmt_store_result(), mysqli_stmt_num_rows() may be called immediately.

인수

stmt

순차 형식 전용: mysqli_stmt_init()가 반환한 statement 식별자.

반환값

An integer representing the number of rows in result set.

예제

Example #1 객체 기반 형식

<?php
/* Open a connection */
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

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

$query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 20";
if ($stmt = $mysqli->prepare($query)) {

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

    /* store result */
    $stmt->store_result();

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

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

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

Example #2 절차식 형식

<?php
/* Open a connection */
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

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

$query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 20";
if ($stmt = mysqli_prepare($link, $query)) {

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

    /* store result */
    mysqli_stmt_store_result($stmt);

    printf("Number of rows: %d.\n", mysqli_stmt_num_rows($stmt));

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

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

위 예제들의 출력:

Number of rows: 20.

참고

mysqli_stmt
PHP Manual