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1、安装Berkeley DB
# cd /usr/local/src # wget http://download.oracle.com/berkeley-db/db-4.6.21.tar.gz # tar -zxvf db-4.6.21.tar.gz # cd db-4.6.21 # cd build_unix Berkeley DB默认是安装在/usr/local/BerkeleyDB.4.6目录下，其中4.6就是版本号，你也可以指定–prefix参数来设置安装目录 # ../dist/configure --prefix=/usr/local/berkeleydb --enable-cxx 其中–enable-cxx就是编译C++库，这样才能编译Berkeley DB数据库的PHP扩展php_db4 # make # make install # echo '/usr/local/berkeleydb/lib/' >> /etc/ld.so.conf # ldconfig 这2句的作用就是通知系统Berkeley DB的动态链接库在/usr/local/berkeleydb/lib/目录。 如果没有系统提示ldconfig命令，则用whereis ldconfig找一下在哪，一般可用 # /sbin/ldconfig 至此，Berkeley DB数据库已经安装完成。 2、安装Berkeley DB的PHP扩展 虽然PHP里已经自带了php_db和php_dba两个扩展都支持Berkekey DB，但是毕竟支持的有限，所以还是编译Berkeley DB自带的php_db4扩展好。 # cd /usr/local/src/db-4.6.18/php_db4/ # phpize（/usr/local/php/bin/phpize） # ./configure --with-db4=/usr/local/berkeleydb/ --with-php-config=/usr/local/php/bin/php-config # make # make install 说明：这里configure的时候可能会提示你找不到php-config，你可以找到你的php安装PATH，然后增加--with-php- config=PATH 至此db4已编译好在/usr/lib64/php/modules/db4.so目录(具体跟你的系统有关) echo 'extension=db4.so' > /etc/php.d/db4.ini 重起WEB服务器(Apache等) 至此php_db4扩展的安装也完成了，执行php -m即可看到db4扩展已经加载了。 3、测试php_db4扩展php_db4提供了下面4个类： class Db4Env { function Db4Env($flags = 0) {} function close($flags = 0) {} function dbremove($txn, $filename, $database = null, $flags = 0) {} function dbrename($txn, $file, $database, $new_database, $flags = 0) {} function open($home, $flags = DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN, $mode = 0666) {} function remove($home, $flags = 0) {} function set_data_dir($directory) {} function txn_begin($parent_txn = null, $flags = 0) {} function txn_checkpoint($kbytes, $minutes, $flags = 0) {} } class Db4 { function Db4($dbenv = null) {} // create a new Db4 object using the optional DbEnv function open($txn = null, $file = null, $database = null, $flags = DB_CREATE, $mode = 0) {} function close() {} function del($key, $txn = null) {} function get($key, $txn = null, $flags = 0) {} function pget($key, &$pkey, $txn = null, $flags = 0) {} function get_type() {} // returns the stringified database type name function stat($txn = null, $flags = 0) {} // returns statistics as an as function join($cursor_list, $flags = 0) {} function sync() {} function truncate($txn = null, $flags = 0) {} function cursor($txn = null, flags = 0) {} } class Db4Txn { function abort() {} function commit() {} function discard() { function id() {} function set_timeout($timeout, $flags = 0) {} } class Db4Cursor { function close() {} function count() {} function del() {} function dup($flags = 0) {} function get($key, $flags = 0) {} function pget($key, &$primary_key, $flags = 0) {} function put($key, $data, $flags = 0) {} } 从字面上也不难理解，Db4Env设置数据库环境、Db4操作数据库、Db4Txn用于事务处理、Db4Cursor用于光标处理。具体使用可参考 http://www.oracle.com/technology/documentation/berkeley-db/db/ref/ext/php.html /usr/local/src/db-4.6.18/php_db4/samples目录下提供了2个简单的例子simple_counter.php和 transactional_counter.php。 simple_counter.php // Create a new Db4 Instance $db = new Db4(); // Open it outside a Db4Env environment with datafile/var/lib/db4 // and database name "test" $db->open(null, "/var/tmp/db4", "test"); // Get the current value of "counter" $counter = $db->get("counter"); print "Counter Value is $counter/n"; // Increment $counter and put() it. $db->put("counter", $counter+1); // Sync to be certain, since we're leaving the handle open $db->sync(); ?> transactional_counter.php // Open a new Db4Env $dbenv = new Db4Env(); $dbenv->set_data_dir("/var/tmp/dbhome"); $dbenv->open("/var/tmp/dbhome"); // Open a database in $dbenv. Note that even though // we pass null in as the transaction, db4 forces this // operation to be transactionally protected, so PHP // will force auto-commit internally. $db = new Db4($dbenv); $db->open(null, 'a', 'foo'); $counter = $db->get("counter"); // Create a new transaction $txn = $dbenv->txn_begin(); if($txn == false) { print "txn_begin failed"; exit; } print "Current value of counter is $counter/n"; // Increment and reset counter, protect it with $txn $db->put("counter", $counter+1, $txn); // Commit the transaction, otherwise the above put() will rollback. $txn->commit(); // Sync for good measure $db->sync(); // This isn't a real close, use _close() for that. $db->close(); ?>需要补充的是
db4.so文件
cp modules/db4.so /usr/local/php5/ext/ 这里需要你先设置你的php的扩展目录的在 在php.ini里面 通过设extension_dir 最后一不是你在php.ini文件中打开这个扩展 extension=jinzhesheng_module.sohttp://cms.nn200.com/html/system/201011/1117992/
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