PHP连接SQLite数据库
SQLite3扩展名在PHP 5.3.0+
以上都会默认启用。可以在编译时使用--without-sqlite3
来禁用它。
Windows用户可通过启用php_sqlite3.dll
才能使用此扩展。 php_sqlite3.dll
默认包含在PHP 5.3.0
之后的PHP发行版中。
有关详细的安装说明,请查看PHP教程及其官方网站。
连接到SQLite数据库
以下PHP代码显示如何连接到SQLite数据库。 如果数据库不存在,那么它将创建一个新的数据库,最后将返回一个数据库对象。
<?php
class SQLiteDB extends SQLite3
{
function __construct()
{
$this->open('phpdb.db');
}
}
$db = new SQLiteDB();
if(!$db){
echo $db->lastErrorMsg();
} else {
echo "Yes, Opened database successfully\n";
}
?>
现在,运行上面的程序在当前目录中创建指定数据库:phpdb.db
。可以根据需要更改路径。 如果数据库成功创建,则会提供以下消息:
在执行上面语句后,应该也会在相同的目录下自动创建一个名称为:phpdb.db
的数据库文件。如下所示 -
创建表
以下PHP程序将用于在上面创建的数据库(phpdb.db
)中创建一个表:
<?php
class SQLiteDB extends SQLite3
{
function __construct()
{
$this->open('phpdb.db');
}
}
$db = new SQLiteDB();
if(!$db){
echo $db->lastErrorMsg();
} else {
echo "Yes, Opened database successfully<br/>\n";
}
$sql =<<<EOF
CREATE TABLE company
(ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL);
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Table created successfully<br/>\n";
}
$db->close();
当执行上述程序时,它将在数据库(phpdb.db
)中创建一个名称为:company
的表,并显示以下消息:
插入数据操作
以下PHP程序显示了如何在上述示例中创建的company
表中插入数据记录:
<?php
class SQLiteDB extends SQLite3
{
function __construct()
{
$this->open('phpdb.db');
}
}
$db = new SQLiteDB();
if(!$db){
echo $db->lastErrorMsg();
} else {
echo "Yes, Opened database successfully<br/>\n";
}
// 先删除后创建表
$sql = "DROP table company";
$ret = $db->exec($sql);
// 创建表语句
$sql =<<<EOF
CREATE TABLE if not exists company
(ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL);
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Table created successfully<br/>\n";
}
// $db->close();
$sql =<<<EOF
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (1, 'Maxsu', 26, 'Haikou', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (2, 'Allen', 25, 'Guangzhou', 15000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (3, 'Tenny', 23, 'Shanghai', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (4, 'Weiwang', 25, 'Beijing ', 65000.00 );
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Some Records has Inserted successfully<br/>\n";
}
$db->close();
当执行上述程序时,将向company
表中插入给定的记录,并显示如下:
SELECT操作
以下PHP程序显示了如何从上述示例中创建的company
表中获取并显示数据记录:
<?php
class SQLiteDB extends SQLite3
{
function __construct()
{
$this->open('phpdb.db');
}
}
$db = new SQLiteDB();
if(!$db){
echo $db->lastErrorMsg();
} else {
echo "Yes, Opened database successfully<br/>\n";
}
// 先删除后创建表
$sql = "DROP table company";
$ret = $db->exec($sql);
// 创建表
$sql =<<<EOF
CREATE TABLE if not exists company
(ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL);
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Table created successfully<br/>\n";
}
// $db->close();
$sql =<<<EOF
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (1, 'Maxsu', 26, 'Haikou', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (2, 'Allen', 25, 'Guangzhou', 15000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (3, 'Tenny', 23, 'Shanghai', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (4, 'Weiwang', 25, 'Beijing ', 65000.00 );
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Some Records has Inserted successfully<br/>\n";
}
// 查询表中的数据
echo "<b> Select Data from company table :</b><hr/>";
$sql =<<<EOF
SELECT * from COMPANY;
EOF;
$ret = $db->query($sql);
while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
echo "ID = ". $row['ID'] . "<br/>\n";
echo "NAME = ". $row['NAME'] ."<br/>\n";
echo "ADDRESS = ". $row['ADDRESS'] ."<br/>\n";
echo "SALARY = ".$row['SALARY'] ."<br/>\n\n";
echo '----------------------------------<br/>';
}
echo "Operation done successfully\n";
$db->close();
执行上述程序时,会产生以下结果:
更新操作
以下PHP代码显示了如何使用UPDATE
语句来更新记录,然后从company
表中获取并显示更新的记录:
<?php
class SQLiteDB extends SQLite3
{
function __construct()
{
$this->open('phpdb.db');
}
}
$db = new SQLiteDB();
if(!$db){
echo $db->lastErrorMsg();
} else {
echo "Yes, Opened database successfully<br/>\n";
}
// 先删除后创建表
$sql = "DROP table company";
$ret = $db->exec($sql);
// 创建表
$sql =<<<EOF
CREATE TABLE if not exists company
(ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL);
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Table created successfully<br/>\n";
}
// $db->close();
$sql =<<<EOF
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (1, 'Maxsu', 26, 'Haikou', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (2, 'Allen', 25, 'Guangzhou', 15000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (3, 'Tenny', 23, 'Shanghai', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (4, 'Weiwang', 25, 'Beijing ', 65000.00 );
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Some Records has Inserted successfully<br/>\n";
}
// 更新ID=1的薪水为:29999
$sql = 'UPDATE COMPANY set SALARY = 29999.00 where ID=1';
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo $db->changes(), " Record(ID=1) updated successfully<br/>\n";
}
// 查询表中的数据
echo "<b> Select Data from company table :</b><hr/>";
$sql =<<<EOF
SELECT * from COMPANY;
EOF;
$ret = $db->query($sql);
while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
echo "ID = ". $row['ID'] . "<br/>\n";
echo "NAME = ". $row['NAME'] ."<br/>\n";
echo "ADDRESS = ". $row['ADDRESS'] ."<br/>\n";
echo "SALARY = ".$row['SALARY'] ."<br/>\n\n";
echo '----------------------------------<br/>';
}
echo "Operation done successfully\n";
$db->close();
执行上述程序时,会产生以下结果:
删除操作
以下PHP代码显示了如何使用DELETE
语句删除任何记录,然后从company
表中获取并显示剩余的记录:
<?php
class SQLiteDB extends SQLite3
{
function __construct()
{
$this->open('phpdb.db');
}
}
$db = new SQLiteDB();
if(!$db){
echo $db->lastErrorMsg();
} else {
echo "Yes, Opened database successfully<br/>\n";
}
// 先删除后创建表
$sql = "DROP table company";
$ret = $db->exec($sql);
// 创建表
$sql =<<<EOF
CREATE TABLE if not exists company
(ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL);
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Table created successfully<br/>\n";
}
// $db->close();
$sql =<<<EOF
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (1, 'Maxsu', 26, 'Haikou', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (2, 'Allen', 25, 'Guangzhou', 15000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (3, 'Tenny', 23, 'Shanghai', 20000.00 );
INSERT INTO company (ID,NAME,AGE,ADDRESS,SALARY)
VALUES (4, 'Weiwang', 25, 'Beijing ', 65000.00 );
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo "Yes, Some Records has Inserted successfully<br/>\n";
}
// 更新ID小于等于2的数据记录
$sql =<<<EOF
DELETE from COMPANY where ID<=2;
EOF;
$ret = $db->exec($sql);
if(!$ret){
echo $db->lastErrorMsg();
} else {
echo $db->changes(), " Record(ID<=2) deleted successfully<br/>\n";
}
// 查询表中的数据
echo "<b> Select Data from company table :</b><hr/>";
$sql =<<<EOF
SELECT * from COMPANY;
EOF;
$ret = $db->query($sql);
while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
echo "ID = ". $row['ID'] . "<br/>\n";
echo "NAME = ". $row['NAME'] ."<br/>\n";
echo "ADDRESS = ". $row['ADDRESS'] ."<br/>\n";
echo "SALARY = ".$row['SALARY'] ."<br/>\n\n";
echo '----------------------------------<br/>';
}
echo "Operation done successfully\n";
$db->close();
执行上述程序时,会产生以下结果:
由于其它操作都类似,只需写上对应SQL语句,然后使用PHP执行即可,所以其它的示例在这里就不再一一演示了。
PHP连接SQLite数据库 https://www.gzza.com/1521.html
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本网站资源来自互联网收集,仅供用于学习和交流,请勿用于商业用途。原创内容除特殊说明外,转载本站文章请注明出处。
如有侵权、不妥之处,联系删除。 Email:master@gzza.com
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