dba_syncXXV. dBase Functions
简介
These functions allow you to access records stored in dBase-format (dbf) databases.
dBase files are simple sequential files of fixed length records. Records are appended to the end of the file and delete records are kept until you call dbase_pack().
The types of dBase fields available are:
表48.Available types of fields
| Field | dBase Type | Format | Additional information |
|---|---|---|---|
| M | Memo | n/a | This type is not supported by PHP, such field will be ignored |
| D | Date | YYYYMMDD | The field length is limited to 8 |
| N | Number | A number | You must declare a length and a precision (the number of digits after the decimal point) |
| C | String | A string | You must declare a length. When retrieving data, the string will be right-padded with spaces to fit the declared length. |
| L | Boolean | T or Y for TRUE, F or N for FALSE | Stored and returned as an integer (1 or 0) |
| F | Float | A float number | Support for this type of field was added in PHP 5.2.0 |
There is no support for indexes or memo fields. There is no support for locking, too. Two concurrent web server processes modifying the same dBase file will very likely ruin your database.
We recommend that you do not use dBase files as your production database. Choose any real SQL server instead; » MySQL or » Postgres are common choices with PHP. dBase support is here to allow you to import and export data to and from your web database, because the file format is commonly understood by Windows spreadsheets and organizers.
安装
In order to enable the bundled dbase library and to use these functions, you must compile PHP with the --enable-dbase option.
运行时配置
本扩展模块在 php.ini 中未定义任何配置选项。
资源类型
本扩展模块未定义任何资源类型。
范例
Many examples in this reference require a dBase database. We will use /tmp/test.dbf that will be created in the example of dbase_create().
预定义常量
本扩展模块未定义任何常量。
目录
- dbase_add_record Adds a record to a database
- dbase_close Closes a database
- dbase_create Creates a database
- dbase_delete_record Deletes a record from a database
- dbase_get_header_info Gets the header info of a database
- dbase_get_record_with_names Gets a record from a database as an associative array
- dbase_get_record Gets a record from a database as an indexed array
- dbase_numfields Gets the number of fields of a database
- dbase_numrecords Gets the number of records in a database
- dbase_open Opens a database
- dbase_pack Packs a database
- dbase_replace_record Replaces a record in a database
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User Contributed NotesdBase Functions