C Data Handles
(PHP 7 >= 7.4.0, PHP 8)
はじめに
FFI\CData objects can be used in a number of ways as a regular PHP data:
-
C data of scalar types can be read and assigned via the $cdata property, e.g.
$x = FFI::new('int'); $x->cdata = 42;
-
C struct and union fields can be accessed as regular PHP object property, e.g.
$cdata->field
-
C array elements can be accessed as regular PHP array elements, e.g.
$cdata[$offset]
- C arrays can be iterated using foreach statements.
- C arrays can be used as arguments of count().
-
C pointers can be dereferenced as arrays, e.g.
$cdata[0]
-
C pointers can be compared using regular comparison operators (
<
,<=
,==
,!=
,>=
,>
). -
C pointers can be incremented and decremented using regular
+
/-
/++
/--
operations, e.g.$cdata += 5
-
C pointers can be subtracted from another using regular
-
operations. -
C pointers to functions can be called as a regular PHP closure, e.g.
$cdata()
-
Any C data can be duplicated using the clone
operator, e.g.
$cdata2 = clone $cdata;
- Any C data can be visualized using var_dump(), print_r(), etc.
- FFI\CData can now be assigned to structs and fields as of PHP 8.3.0.
注意: Notable limitations are that FFI\CData instances do not support isset(), empty() and unset(), and that wrapped C structs and unions do not implement Traversable.
クラス概要
final
class FFI\CData
{
}変更履歴
バージョン | 説明 |
---|---|
8.3.0 | FFI\CData can now be assigned to structs and fields. |
+add a note
User Contributed Notes
There are no user contributed notes for this page.
↑ and ↓ to navigate •
Enter to select •
Esc to close
Press Enter without
selection to search using Google