Paradox File Access
Introduktion
Denne udvidelse er EKSPERIMENTABEL. Virkemåden af denne udvidelse -- inklusiv navnene på des funktioner og alt andet dokumenteret om udvidelsen -- ændres muligvis uden advarsel, i en fremtidig version af PHP. Brug af denne udvidelse er på ejet ansvar.
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.
Note: This module is also in development and may change, though I don't expect major changes to the API.
Systemkrav
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.
Installation
Uddybende information så som nye udgivelser, downloads, kildekoder, vedligeholder information samt en CHANGELOG, kan findes her: » https://pecl.php.net/package/paradox
Make sure you have pxlib installed before. If you install pxlib from an rpm or debian package, do not forget to install the development package as well.
Runtime Konfiguration
Denne udvidelse har intet konfigurations-direktiv defineret i 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.
| 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() |
Ressourcetyper
px_new() creates a new Paradox object required by all Paradox functions.
Foruddefinerede Konstanter
Konstanterne nedenunder er defineret af denne udvidelse, og vil kun være tilgængelige når denne udvidelse enten er blevet kompileret ind i PHP eller dynamisk indsat under runtime.
The following two tables lists all constants defined by the paradox extension.
| 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 |
| 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 |
Table of Contents
- 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