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XXVIII. dbx Functions

Въведение

The dbx module is a database abstraction layer (db 'X', where 'X' is a supported database). The dbx functions allow you to access all supported databases using a single calling convention. The dbx-functions themselves do not interface directly to the databases, but interface to the modules that are used to support these databases.

Забележка: Това разширение беше преместено в PECL хранилището и вече не е част от пакета на PHP от PHP 5.1.0.

Изисквания

To be able to use a database with the dbx-module, the module must be either linked or loaded into PHP, and the database module must be supported by the dbx-module. Currently, the following databases are supported, but others will follow:

  • FrontBase (available from PHP 4.1.0).

  • Microsoft SQL Server

  • MySQL

  • ODBC

  • PostgreSQL

  • Sybase-CT (available from PHP 4.2.0).

  • Oracle (oci8) (available from PHP 4.3.0).

  • SQLite (PHP 5).

Documentation for adding additional database support to dbx can be found at http://www.guidance.nl/php/dbx/doc/.

Инсталация

In order to have these functions available, you must compile PHP with dbx support by using the --enable-dbx option and all options for the databases that will be used, e.g. for MySQL you must also specify --with-mysql=[DIR]. To get other supported databases to work with the dbx-module refer to their specific documentation.

Конфигурация по време на работа

Поведението на тези функции зависи от настройките в php.ini.

Таблица 1. DBX Configuration Options

За по-детайлна информация и дефинициите на константите PHP_INI_*, вижте .

Тук има кратко описание на конфигурационните директиви.

dbx.colnames_case string

Columns names can be returned "unchanged" or converted to "uppercase" or "lowercase". This directive can be overridden with a flag to dbx_query().

Ресурсни типове

There are two resource types used in the dbx module. The first one is the link-object for a database connection, the second a result-object which holds the result of a query.

Предефинирани константи

Константите по-долу са дефинирани в това разширение и ще бъдат налични единствено, когато това разширение е компилирано в PHP или динамично пуснато по време на изпълнение.

DBX_MYSQL (integer)

DBX_ODBC (integer)

DBX_PGSQL (integer)

DBX_MSSQL (integer)

DBX_FBSQL (integer)

DBX_OCI8 (integer) (available from PHP 4.3.0)

DBX_SYBASECT (integer)

DBX_SQLITE (integer) (PHP 5)

DBX_PERSISTENT (integer)

DBX_RESULT_INFO (integer)

DBX_RESULT_INDEX (integer)

DBX_RESULT_ASSOC (integer)

DBX_RESULT_UNBUFFERED (integer) (PHP 5)

DBX_COLNAMES_UNCHANGED (integer) (available from PHP 4.3.0)

DBX_COLNAMES_UPPERCASE (integer) (available from PHP 4.3.0)

DBX_COLNAMES_LOWERCASE (integer) (available from PHP 4.3.0)

DBX_CMP_NATIVE (integer)

DBX_CMP_TEXT (integer)

DBX_CMP_NUMBER (integer)

DBX_CMP_ASC (integer)

DBX_CMP_DESC (integer)

Съдържание
dbx_close -- Close an open connection/database
dbx_compare -- Compare two rows for sorting purposes
dbx_connect -- Open a connection/database
dbx_error --  Report the error message of the latest function call in the module
dbx_escape_string --  Escape a string so it can safely be used in an sql-statement
dbx_fetch_row -- Fetches rows from a query-result that had the DBX_RESULT_UNBUFFERED flag set
dbx_query -- Send a query and fetch all results (if any)
dbx_sort --  Sort a result from a dbx_query by a custom sort function
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dbmreplaceНачало на разделаdbx_close