PHP在網(wǎng)站上實(shí)現(xiàn)跟數(shù)據(jù)庫(kù)添加數(shù)據(jù)

把來(lái)自表單的數(shù)據(jù)插入數(shù)據(jù)庫(kù)

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現(xiàn)在，我們創(chuàng)建一個(gè) HTML 表單，這個(gè)表單可把新記錄插入 "Persons" 表。

這是這個(gè) HTML 表單：

html

body

form?action="insert.php"?method="post"

Firstname:?input?type="text"?name="firstname"?/

Lastname:?input?type="text"?name="lastname"?/

Age:?input?type="text"?name="age"?/

input?type="submit"?/

/form

/body

/html

當(dāng)用戶點(diǎn)擊上例中 HTML 表單中的提交按鈕時(shí)，表單數(shù)據(jù)被發(fā)送到 "insert.php"。"insert.php" 文件連接數(shù)據(jù)庫(kù)，并通過(guò) $_POST 變量從表單取回值。然后，mysql_query() 函數(shù)執(zhí)行 INSERT INTO 語(yǔ)句，一條新的記錄會(huì)添加到數(shù)據(jù)庫(kù)表中。

下面是 "insert.php" 頁(yè)面的代碼：

?php

$con?=?mysql_connect("localhost","peter","abc123");

if?(!$con)

{

die('Could?not?connect:?'?.?mysql_error());

}

mysql_select_db("my_db",?$con);

$sql="INSERT?INTO?Persons?(FirstName,?LastName,?Age)

VALUES

('$_POST[firstname]','$_POST[lastname]','$_POST[age]')";

if?(!mysql_query($sql,$con))

{

die('Error:?'?.?mysql_error());

}

echo?"1?record?added";

mysql_close($con)

?

如何用PHP代碼實(shí)現(xiàn)MySQL數(shù)據(jù)庫(kù)的增刪改查

?php

$con = mysql_connect("localhost:3306","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

$result = mysql_query("SELECT * FROM user");

echo "table border='1'

tr

thUsername/th

thPassword/th

/tr";

while($row = mysql_fetch_array($result)) {

echo "tr";

echo "td" . $row['username'] . "/td";

echo "td" . $row['password'] . "/td";

echo "/tr";

}

echo "/table";

mysql_close($con);

?

從服務(wù)器中獲取用戶所有信息（SQL SELECT語(yǔ)句）并以表格形式出現(xiàn)

?php

$con = mysql_connect("localhost","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

mysql_query("DELETE FROM user WHERE username = '$_POST[username]'");

mysql_close($con);

?

刪除該用戶所有信息delete.php

?php

$con = mysql_connect("localhost:3306","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

$sql = "INSERT INTO user (username,password)

VALUES

('$_POST[username]','$_POST[password]')";

if (!mysql_query($sql,$con)) {

die('Error: ' . mysql_error());

}

echo "1 record added";

mysql_close($con);

?

注冊(cè)一個(gè)新用戶insert.php

?php

$con = mysql_connect("localhost","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

mysql_query("UPDATE user SET password = '$_POST[password]' WHERE username = '$_POST[username]'");

mysql_close($con);

?

修改一個(gè)用戶密碼update.php

html

head

titleFORM/title

/head

body

br /

h1Insert:/h1

form action="insert.php" method="post"

username:input type="name" name="username"/

br /

password:input type="password" name="password"/

input type="submit" value="submit"/

/form

br /hr /br /

h1Delete/h1

form action="delete.php" method="post"

username:input type="name" name="username" /

br /

Are you sure?input type="submit" value="sure" /

/form

br /hr /br /

h1Update/h1

form action="update.php" method="post"

username:input type="name" name="username"/

br /

You want to change your password into:input type="password" name="password"/

input type="submit" value="submit"/

/form

br /hr /br /

/body

/html

以上三個(gè)功能的提交源Operate.html

PHP如何實(shí)現(xiàn)一個(gè)高效的數(shù)據(jù)庫(kù)

你做好程序以后，把數(shù)據(jù)庫(kù)導(dǎo)出成sql文件

1、連接數(shù)據(jù)庫(kù)

2、讀取這個(gè)sql文件里的sql語(yǔ)句，并執(zhí)行

3、生成一個(gè)數(shù)據(jù)庫(kù)連接參數(shù)的php文件

?php

$con = mysql_connect("localhost","peter","abc123");

if (!$con)

{

die('Could not connect: ' . mysql_error());

}

if (mysql_query("CREATE DATABASE my_db",$con))

{

echo "Database created";

}

else

{

echo "Error creating database: " . mysql_error();

}

mysql_close($con);

?

?php

class ReadSql {

//數(shù)據(jù)庫(kù)連接

protected $connect = null;

//數(shù)據(jù)庫(kù)對(duì)象

protected $db = null;

//sql文件

public $sqlFile = "";

//sql語(yǔ)句集

public $sqlArr = array();

public function __construct($host, $user, $pw, $db_name) {

$host = empty($host) ? C("DB_HOST") : $host;

$user = empty($user) ? C("DB_USER") : $user;

$pw = empty($pw) ? C("DB_PWD") : $pw;

$db_name = empty($db_name) ? C("DB_NAME") : $db_name;

//連接數(shù)據(jù)庫(kù)

$this-connect = mysql_connect($host, $user, $pw) or die("Could not connect: " . mysql_error());

$this-db = mysql_select_db($db_name, $this-connect) or die("Yon can not select the table:" . mysql_error());

}

//導(dǎo)入sql文件

public function Import($url) {

$this-sqlFile = file_get_contents($url);

if (!$this-sqlFile) {

exit("打開(kāi)文件錯(cuò)誤");

} else {

$this-GetSqlArr();

if ($this-Runsql()) {

return true;

}

}

}

//獲取sql語(yǔ)句數(shù)組

public function GetSqlArr() {

//去除注釋

$str = $this-sqlFile;

$str = preg_replace('/--.*/i', '', $str);

$str = preg_replace('/\/\*.*\*\/(\;)?/i', '', $str);

//去除空格 創(chuàng)建數(shù)組

$str = explode(";\n", $str);

foreach ($str as $v) {

$v = trim($v);

if (empty($v)) {

continue;

} else {

$this-sqlArr[] = $v;

}

}

}

//執(zhí)行sql文件

public function RunSql() {

foreach ($this-sqlArr as $k = $v) {

if (!mysql_query($v)) {

exit("sql語(yǔ)句錯(cuò)誤：第" . $k . "行" . mysql_error());

}

}

return true;

}

}

//范例：

header("Content-type:text/html;charset=utf-8");

$sql = new ReadSql("localhost", "root", "", "log_db");

$rst = $sql-Import("./log_db.sql");

if ($rst) {

echo "Success！";

}

?

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