Fix #78912: INTL Support for accounting format

We provide `NumberFormatter::CURRENCY_ACCOUNTING` to wrap
`UNUM_CURRENCY_ACCOUNTING `[1].

[1] <https://unicode-org.github.io/icu-docs/apidoc/released/icu4c/unum_8h.html#a4eb4d3ff13bd506e7078b2be4052266dae97cdd7ed612d07d251021c076efb1c5>

Author: cmb69

NEWS

@@ -27,6 +27,9 @@ PHP                                                                        NEWS
   . Fixed bug #78916 (php-fpm 7.4.0 don't send mail via mail()).
     (Jakub Zelenka)
 
+- Intl:
+  . Implemented FR #78912 (INTL Support for accounting format). (cmb)
+
 - Mysqlnd:
   . Fixed bug #78823 (ZLIB_LIBS not added to EXTRA_LIBS). (Arjen de Korte)
 

ext/intl/formatter/formatter.c

@@ -51,7 +51,9 @@ void formatter_register_constants( INIT_FUNC_ARGS )
 	FORMATTER_EXPOSE_CLASS_CONST( DURATION );
 	FORMATTER_EXPOSE_CLASS_CONST( PATTERN_RULEBASED );
 	FORMATTER_EXPOSE_CLASS_CONST( IGNORE );
-
+#if U_ICU_VERSION_MAJOR_NUM >= 53
+	FORMATTER_EXPOSE_CLASS_CONST( CURRENCY_ACCOUNTING );
+#endif
 	FORMATTER_EXPOSE_CUSTOM_CLASS_CONST( "DEFAULT_STYLE",  UNUM_DEFAULT );
 
 	/* UNumberFormatRoundingMode */

ext/intl/tests/bug78912.phpt

@@ -0,0 +1,14 @@
+--TEST--
+Request #78912 (INTL Support for accounting format)
+--SKIPIF--
+<?php
+if (!extension_loaded('intl')) die('skip intl extension not available');
+if (version_compare(INTL_ICU_VERSION, '53.0') < 0) die('skip for ICU >= 53.0');
+?>
+--FILE--
+<?php
+$nf = new NumberFormatter('en_US', NumberFormatter::CURRENCY_ACCOUNTING);
+var_dump($nf->formatCurrency(-12345.67, 'USD'));
+?>
+--EXPECT--
+string(12) "($12,345.67)"