《PHP應(yīng)用：PHP中mysqli_affected_rows作用行數(shù)返回值分析》要點(diǎn)：
本文介紹了PHP應(yīng)用：PHP中mysqli_affected_rows作用行數(shù)返回值分析，希望對(duì)您有用。如果有疑問(wèn)，可以聯(lián)系我們。
PHP應(yīng)用本文實(shí)例分析了PHP中mysqli_affected_rows作用行數(shù)返回值.分享給大家供大家參考.具體分析如下：
PHP應(yīng)用mysqli中關(guān)于update操作影響的行數(shù)可以有兩種返回形式:
PHP應(yīng)用1. 返回匹配的行數(shù)
2. 返回影響的行數(shù)
PHP應(yīng)用默認(rèn)情況下mysqli_affected_rows返回的值為影響的行數(shù),如果我們需要返回匹配的行數(shù),可以使用mysqli_real_connect函數(shù)進(jìn)行數(shù)據(jù)庫(kù)連接的初始化,并在函數(shù)的flag參數(shù)位加上:
PHP應(yīng)用MYSQLI_CLIENT_FOUND_ROWS return number of matched rows, not the number of affected rows
PHP應(yīng)用普通格式:
代碼如下:
int mysqli_affected_rows ( mysqli link )
PHP應(yīng)用oop格式：
代碼如下:
class mysqli {
int affected_rows
}
看下例子：
PHP應(yīng)用普通模式,代碼如下:
代碼如下:
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
?
if (!$link) {
printf("Can't connect to localhost. Error: %sn", mysqli_connect_error());
exit();
}
?
/* Insert rows */
mysqli_query($link, "CREATE TABLE Language SELECT * from CountryLanguage");
printf("Affected rows (INSERT): %dn", mysqli_affected_rows($link));
?
mysqli_query($link, "ALTER TABLE Language ADD Status int default 0″);
?
/* update rows */
mysqli_query($link, "UPDATE Language SET Status=1 WHERE Percentage > 50″);
printf("Affected rows (UPDATE): %dn", mysqli_affected_rows($link));
?
/* delete rows */
mysqli_query($link, "DELETE FROM Language WHERE Percentage < 50″);
printf("Affected rows (DELETE): %dn", mysqli_affected_rows($link));
?
/* select all rows */
$result = mysqli_query($link, "SELECT CountryCode FROM Language");
printf("Affected rows (SELECT): %dn", mysqli_affected_rows($link));
?
mysqli_free_result($result);
PHP應(yīng)用/* Delete table Language */
mysqli_query($link, "DROP TABLE Language");
?
/* close connection */
mysqli_close($link);
?>
,代碼如下:
代碼如下:
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
?
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %sn", mysqli_connect_error());
exit();
}
?
/* Insert rows */
$mysqli->query("CREATE TABLE Language SELECT * from CountryLanguage");
printf("Affected rows (INSERT): %dn", $mysqli->affected_rows);
?
$mysqli->query("ALTER TABLE Language ADD Status int default 0″);
?
/* update rows */
$mysqli->query("UPDATE Language SET Status=1 WHERE Percentage > 50″);
printf("Affected rows (UPDATE): %dn", $mysqli->affected_rows);
?
/* delete rows */
$mysqli->query("DELETE FROM Language WHERE Percentage < 50″);
printf("Affected rows (DELETE): %dn", $mysqli->affected_rows);
?
/* select all rows */
$result = $mysqli->query("SELECT CountryCode FROM Language");
printf("Affected rows (SELECT): %dn", $mysqli->affected_rows);
?
$result->close();
?
/* Delete table Language */
$mysqli->query("DROP TABLE Language");
?
/* close connection */
$mysqli->close();
?>
PHP應(yīng)用希望本文所述對(duì)大家的php程序設(shè)計(jì)有所贊助.
歡迎參與《PHP應(yīng)用：PHP中mysqli_affected_rows作用行數(shù)返回值分析》討論，分享您的想法，維易PHP學(xué)院為您提供專業(yè)教程。
轉(zhuǎn)載請(qǐng)注明本頁(yè)網(wǎng)址：
http://www.fzlkiss.com/jiaocheng/13173.html
