ini intl.explicit_cleanup -> INTL_EXPLICIT_CLEANUP

Added an environment variable and removed the ini setting
intl.explicit_cleanup for calling u_cleanup()

ext/intl/php_intl.c

@@ -853,36 +853,11 @@ zend_function_entry intl_functions[] = {
 };
 /* }}} */
 
-static zend_bool explicit_cleanup = 0;
-
-static ZEND_INI_MH(OnExplicitCleanupUpdate)
-{
-	if (stage == PHP_INI_STAGE_STARTUP) {
-		if (new_value_length == 2 && strcasecmp("on", new_value) == 0) {
-			explicit_cleanup = (zend_bool)1;
-		}
-		else if (new_value_length == 3 && strcasecmp("yes", new_value) == 0) {
-			explicit_cleanup = (zend_bool)1;
-		}
-		else if (new_value_length == 4 && strcasecmp("true", new_value) == 0) {
-			explicit_cleanup = (zend_bool)1;
-		}
-		else {
-			explicit_cleanup = (zend_bool)atoi(new_value);
-		}
-		return SUCCESS;
-	} else {
-		return FAILURE;
-	}
-}
-
-
 /* {{{ INI Settings */
 PHP_INI_BEGIN()
     STD_PHP_INI_ENTRY(LOCALE_INI_NAME, NULL, PHP_INI_ALL, OnUpdateStringUnempty, default_locale, zend_intl_globals, intl_globals)
     STD_PHP_INI_ENTRY("intl.error_level", "0", PHP_INI_ALL, OnUpdateLong, error_level, zend_intl_globals, intl_globals)
 	STD_PHP_INI_ENTRY("intl.use_exceptions", "0", PHP_INI_ALL, OnUpdateBool, use_exceptions, zend_intl_globals, intl_globals)
-	PHP_INI_ENTRY_EX("intl.explicit_cleanup", "0", 0, OnExplicitCleanupUpdate, zend_ini_boolean_displayer_cb)
 PHP_INI_END()
 /* }}} */
 
@@ -1015,14 +990,18 @@ PHP_MINIT_FUNCTION( intl )
 }
 /* }}} */
 
+#define EXPLICIT_CLEANUP_ENV_VAR "INTL_EXPLICIT_CLEANUP"
+
 /* {{{ PHP_MSHUTDOWN_FUNCTION
  */
 PHP_MSHUTDOWN_FUNCTION( intl )
 {
+	const char *cleanup;
     /* For the default locale php.ini setting */
     UNREGISTER_INI_ENTRIES();
 
-    if (explicit_cleanup) {
+	cleanup = getenv(EXPLICIT_CLEANUP_ENV_VAR);
+    if (cleanup != NULL && !(cleanup[0] == '0' && cleanup[1] == '\0')) {
 		u_cleanup();
     }