SQLite3擴(kuò)展名在PHP 5.3.0+以上都會默認(rèn)啟用?？梢栽诰幾g時使用--without-sqlite3來禁用它。

Windows用戶可通過啟用php_sqlite3.dll才能使用此擴(kuò)展。 php_sqlite3.dll默認(rèn)包含在PHP 5.3.0之后的PHP發(fā)行版中。

有關(guān)詳細(xì)的安裝說明，請查看PHP教程及其官方網(wǎng)站。

連接到SQLite數(shù)據(jù)庫

以下PHP代碼顯示如何連接到SQLite數(shù)據(jù)庫。 如果數(shù)據(jù)庫不存在，那么它將創(chuàng)建一個新的數(shù)據(jù)庫，最后將返回一個數(shù)據(jù)庫對象。

<?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";
   }
?>

現(xiàn)在，運行上面的程序在當(dāng)前目錄中創(chuàng)建指定數(shù)據(jù)庫：phpdb.db。可以根據(jù)需要更改路徑。 如果數(shù)據(jù)庫成功創(chuàng)建，則會提供以下消息：

在執(zhí)行上面語句后，應(yīng)該也會在相同的目錄下自動創(chuàng)建一個名稱為：phpdb.db的數(shù)據(jù)庫文件。如下所示 -

創(chuàng)建表

以下PHP程序?qū)⒂糜谠谏厦鎰?chuàng)建的數(shù)據(jù)庫(phpdb.db)中創(chuàng)建一個表：

<?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();

當(dāng)執(zhí)行上述程序時，它將在數(shù)據(jù)庫(phpdb.db)中創(chuàng)建一個名稱為：company的表，并顯示以下消息：

插入數(shù)據(jù)操作

以下PHP程序顯示了如何在上述示例中創(chuàng)建的company表中插入數(shù)據(jù)記錄：

<?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";
}

// 先刪除后創(chuàng)建表
$sql = "DROP table company";
$ret = $db->exec($sql);

// 創(chuàng)建表語句

$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();

當(dāng)執(zhí)行上述程序時，將向company表中插入給定的記錄，并顯示如下：

SELECT操作

以下PHP程序顯示了如何從上述示例中創(chuàng)建的company表中獲取并顯示數(shù)據(jù)記錄：

<?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";
}

// 先刪除后創(chuàng)建表
$sql = "DROP table company";
$ret = $db->exec($sql);

// 創(chuàng)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";
}

// 查詢表中的數(shù)據(jù)

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();

執(zhí)行上述程序時，會產(chǎn)生以下結(jié)果：

更新操作

以下PHP代碼顯示了如何使用UPDATE語句來更新記錄，然后從company表中獲取并顯示更新的記錄：

<?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";
}

// 先刪除后創(chuàng)建表
$sql = "DROP table company";
$ret = $db->exec($sql);

// 創(chuàng)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的薪水為：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";
}


// 查詢表中的數(shù)據(jù)

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();

執(zhí)行上述程序時，會產(chǎn)生以下結(jié)果：

刪除操作

以下PHP代碼顯示了如何使用DELETE語句刪除任何記錄，然后從company表中獲取并顯示剩余的記錄：

<?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";
}

// 先刪除后創(chuàng)建表
$sql = "DROP table company";
$ret = $db->exec($sql);

// 創(chuàng)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的數(shù)據(jù)記錄

$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";
}

// 查詢表中的數(shù)據(jù)

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();

執(zhí)行上述程序時，會產(chǎn)生以下結(jié)果：

由于其它操作都類似，只需寫上對應(yīng)SQL語句，然后使用PHP執(zhí)行即可，所以其它的示例在這里就不再一一演示了。如有疑問，可以留言聯(lián)系。