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本文实例讲述了PHP连接及操作PostgreSQL数据库的方法。分享给大家供大家参考,具体如下:
PostgreSQL扩展在默认情况下在最新版本的PHP 5.3.x中是启用的。 可以在编译时使用--without-pgsql来禁用它。仍然可以使用yum命令来安装PHP-PostgreSQL接口:
yum install php-pgsql
在开始使用PHP连接PostgreSQL接口之前,请先在PostgreSQL安装目录中找到pg_hba.conf文件,并添加以下行:
# IPv4 local connections: host all all 127.0.0.1/32 md5
您可以启动/重新启动postgres服务器,使用以下命令运行:
[root@host]# service postgresql restart Stopping postgresql service: [ OK ] Starting postgresql service: [ OK ]
Windows用户必须启用php_pgsql.dll才能使用此扩展名。这个DLL包含在最新版本的PHP 5.3.x中的Windows发行版中。
PHP连接到PostgreSQL数据库
以下PHP代码显示如何连接到本地机器上的现有数据库,最后将返回数据库连接对象。
<"host=127.0.0.1"; $port = "port=5432"; $dbname = "dbname=testdb"; $credentials = "user=postgres password=pass123"; $db = pg_connect( "$host $port $dbname $credentials" ); if(!$db){ echo "Error : Unable to open database\n"; } else { echo "Opened database successfully\n"; } "htmlcode"><"host=127.0.0.1"; $port = "port=5432"; $dbname = "dbname=testdb"; $credentials = "user=postgres password=pass123"; $db = pg_connect( "$host $port $dbname $credentials" ); if(!$db){ echo "Error : Unable to open database\n"; } else { echo "Opened database successfully\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; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); } else { echo "Table created successfully\n"; } pg_close($db); "htmlcode"><"host=127.0.0.1"; $port = "port=5432"; $dbname = "dbname=testdb"; $credentials = "user=postgres password=pass123"; $db = pg_connect( "$host $port $dbname $credentials" ); if(!$db){ echo "Error : Unable to open database\n"; } else { echo "Opened database successfully\n"; } $sql =<<<EOF INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (1, 'Paul', 32, 'California', 20000.00 ); INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (2, 'Allen', 25, 'Texas', 15000.00 ); INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (3, 'Teddy', 23, 'Norway', 20000.00 ); INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00 ); EOF; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); } else { echo "Records created successfully\n"; } pg_close($db); "htmlcode"><"host=127.0.0.1"; $port = "port=5432"; $dbname = "dbname=testdb"; $credentials = "user=postgres password=pass123"; $db = pg_connect( "$host $port $dbname $credentials" ); if(!$db){ echo "Error : Unable to open database\n"; } else { echo "Opened database successfully\n"; } $sql =<<<EOF SELECT * from COMPANY; EOF; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); exit; } while($row = pg_fetch_row($ret)){ echo "ID = ". $row[0] . "\n"; echo "NAME = ". $row[1] ."\n"; echo "ADDRESS = ". $row[2] ."\n"; echo "SALARY = ".$row[4] ."\n\n"; } echo "Operation done successfully\n"; pg_close($db); "htmlcode"><"host=127.0.0.1"; $port = "port=5432"; $dbname = "dbname=testdb"; $credentials = "user=postgres password=pass123"; $db = pg_connect( "$host $port $dbname $credentials" ); if(!$db){ echo "Error : Unable to open database\n"; } else { echo "Opened database successfully\n"; } $sql =<<<EOF UPDATE COMPANY set SALARY = 25000.00 where ID=1; EOF; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); exit; } else { echo "Record updated successfully\n"; } $sql =<<<EOF SELECT * from COMPANY; EOF; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); exit; } while($row = pg_fetch_row($ret)){ echo "ID = ". $row[0] . "\n"; echo "NAME = ". $row[1] ."\n"; echo "ADDRESS = ". $row[2] ."\n"; echo "SALARY = ".$row[4] ."\n\n"; } echo "Operation done successfully\n"; pg_close($db); "htmlcode"><"host=127.0.0.1"; $port = "port=5432"; $dbname = "dbname=testdb"; $credentials = "user=postgres password=pass123"; $db = pg_connect( "$host $port $dbname $credentials" ); if(!$db){ echo "Error : Unable to open database\n"; } else { echo "Opened database successfully\n"; } $sql =<<<EOF DELETE from COMPANY where ID=2; EOF; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); exit; } else { echo "Record deleted successfully\n"; } $sql =<<<EOF SELECT * from COMPANY; EOF; $ret = pg_query($db, $sql); if(!$ret){ echo pg_last_error($db); exit; } while($row = pg_fetch_row($ret)){ echo "ID = ". $row[0] . "\n"; echo "NAME = ". $row[1] ."\n"; echo "ADDRESS = ". $row[2] ."\n"; echo "SALARY = ".$row[4] ."\n\n"; } echo "Operation done successfully\n"; pg_close($db); "_blank" href="//www.jb51.net/Special/192.htm">PHP基于pdo操作数据库技巧总结》、《php+Oracle数据库程序设计技巧总结》、《PHP+MongoDB数据库操作技巧大全》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》希望本文所述对大家PHP程序设计有所帮助。
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