CXV. Paradox File Access
Wstęp
| Ostrzeżenie |
Ten moduł jest w stadium EKSPERYMENTALNYM. Oznacza to, że zachowanie tych funkcji, ich nazwy, w zasadzie wszystko udokumentowane tutaj może zostać zmienione w przyszłych wersjach PHP bez wcześniejszego uprzedzenia. Używaj tego modułu na własne ryzyko. |
This module allows to read and write Paradox databases, primary index files and blob files. Write support has been proven to be quite reliable, though due to lack of documentation the produced files may not in any case be readable by other applications. Encrypted databases can be read without specifying a password if pxlib >= 0.5.0 is used.
Notatka: This module is also in development and may change, though I don't expect major changes to the API.
Wymagania
You need at least PHP 5.0.0 and pxlib >= 0.4.4 for the basic set of functions. Some newer functions are only available with pxlib >= 0.6.0. Reading and writing of encrypted databases requires at least pxlib >= 0.5.0. The paradox library (pxlib) is available at https://pxlib.sourceforge.net.
Instalacja
A short installation note: just type
$ pear install paradox |
Konfiguracja uruchomieniowa
To rozszerzenie nie definiuje posiada żadnych dyrektyw konfiguracyjnych w pliku php.ini.
Object oriented API
The paradox extension provides also an object oriented API. It consists of only one class called paradox_db. Its methods only differ from the functions in its name and of course the missing first parameter. The following table will list all methods and its equivalent functions.
Tabela 1. Methods of class paradox_db
| Name of method | Equivalent function |
|---|---|
| Constructor | px_new() |
| Destructor | px_delete() |
| open_fp() | px_open_fp() |
| create_fp() | px_create_fp() |
| close() | px_close() |
| numrecords() | px_numrecords() |
| numfields() | px_numfields() |
| get_record() | px_get_record() |
| put_record() | px_put_record() |
| retrieve_record() | px_retrieve_record() |
| delete_record() | px_delete_record() |
| insert_record() | px_insert_record() |
| update_record() | px_update_record() |
| get_field() | px_get_field() |
| get_schema() | px_get_schema() |
| get_info() | px_get_info() |
| set_parameter() | px_set_parameter() |
| get_parameter() | px_get_parameter() |
| set_value() | px_set_value() |
| get_value() | px_get_value() |
| get_info() | px_get_info() |
| set_targetencoding() | px_set_targetencoding() |
| set_tablename() | px_set_tablename() |
| set_blob_file() | px_set_blob_file() |
| date2string() | px_date2string() |
| timestamp2string() | px_timestamp2string() |
Stałe predefiniowane
Poniższe stałe są zdefiniowane w tym rozszerzeniu i stają się dostępne, gdy rozszerzenie jest dokompilowane do PHP, lub załadowane dynamicznie przy starcie.
The following two tables lists all constants defined by the paradox extension.
Tabela 2. Contants for field types
| Name | Meaning |
|---|---|
| PX_FIELD_ALPHA | Character data with fixed length |
| PX_FIELD_DATE | Date, number of days since 1.1.0000 |
| PX_FIELD_SHORT | Short integer (2 Bytes) |
| PX_FIELD_LONG | Long integer (4 Bytes) |
| PX_FIELD_CURRENCY | same as PX_FIELD_NUMBER |
| PX_FIELD_NUMBER | Double |
| PX_FIELD_LOGICAL | Boolean |
| PX_FIELD_MEMOBLOB | Binary large object |
| PX_FIELD_BLOB | Binary large object (not supported) |
| PX_FIELD_FMTMEMOBLOB | Binary large object |
| PX_FIELD_OLE | OLE object (basically a blob, not supported) |
| PX_FIELD_GRAPHIC | Graphic (basically a blob, not supported) |
| PX_FIELD_TIME | time, number of milli seconds since midnight |
| PX_FIELD_TIMESTAMP | timestamp, number of milli seconds since 1.1.0000 |
| PX_FIELD_AUTOINC | Auto incrementing interger (like PX_FIELD_LONG) |
| PX_FIELD_BCD | Decimal number stored in bcd format (not supported) |
| PX_FIELD_BYTES | Array of Bytes with not more than 255 bytes (not supported) |
| PX_KEYTOLOWER | Turn all field names into lower case |
| PX_KEYTOUPPER | Turn all field names into upper case |
Tabela 3. Contants for file types
| Name | Meaning |
|---|---|
| PX_FILE_INDEX_DB | Indexed database |
| PX_FILE_PRIM_INDEX | Primary index |
| PX_FILE_NON_INDEX_DB | None indexed database |
| PX_FILE_NON_INC_SEC_INDEX | None incremental secondary index |
| PX_FILE_SEC_INDEX | Secondary index |
| PX_FILE_INC_SEC_INDEX | Incremental secondary index |
| PX_FILE_NON_INC_SEC_INDEX_G | Non incremental secondary index |
| PX_FILE_SEC_INDEX_G | Secondary index |
| PX_FILE_INC_SEC_INDEX_G | Non incremental secondary index |
- Spis treści
- px_close -- Closes a paradox database
- px_create_fp -- Create a new paradox database
- px_date2string -- Converts a date into a string.
- px_delete_record -- Deletes record from paradox database
- px_delete -- Deletes resource of paradox database
- px_get_field -- Returns the specification of a single field
- px_get_info -- Return lots of information about a paradox file
- px_get_parameter -- Gets a parameter
- px_get_record -- Returns record of paradox database
- px_get_schema -- Returns the database schema
- px_get_value -- Gets a value
- px_insert_record -- Inserts record into paradox database
- px_new -- Create a new paradox object
- px_numfields -- Returns number of fields in a database
- px_numrecords -- Returns number of records in a database
- px_open_fp -- Open paradox database
- px_put_record -- Stores record into paradox database
- px_retrieve_record -- Returns record of paradox database
- px_set_blob_file -- Sets the file where blobs are read from
- px_set_parameter -- Sets a parameter
- px_set_tablename -- Sets the name of a table (deprecated)
- px_set_targetencoding -- Sets the encoding for character fields (deprecated)
- px_set_value -- Sets a value
- px_timestamp2string -- Converts the timestamp into a string.
- px_update_record -- Updates record in paradox database
| Poprzedni | Spis treści | Następny |
| ovrimos_rollback | Początek rozdziału |