# px_get_schema

(PECL paradox >= 1.0.0)

px_get_schema — Returns the database schema

### 说明

px_get_schema ( resource `$pxdoc` [, int `$mode` = 0 ] ) : array

px_get_schema() returns the database schema.

### 参数

`pxdoc`

  Resource identifier of the paradox database as returned by px_new().

`mode`

  If the optional `mode` is `PX_KEYTOLOWER` or `PX_KEYTOUPPER` the keys of the returned array will be converted to lower or upper case. If `mode` is 0 or not passed at all, then the key name will be identical to the field name.

### 返回值

Returns the schema of a database file as an associated array. The key name is equal to the field name. Each array element is itself an associated array containing the two fields type and size. type is one of the constants in table Constants for field types. size is the number of bytes this field consumes in the record. The total of all field sizes is equal to the record size as it can be retrieved with px-get-info().