PHP_STREAM_TRUNCATE_SUPPORTED  393 main/php_streams.h #define php_stream_truncate_supported(stream)	(_php_stream_set_option((stream), PHP_STREAM_OPTION_TRUNCATE_API, PHP_STREAM_TRUNCATE_SUPPORTED, NULL TSRMLS_CC) == PHP_STREAM_OPTION_RETURN_OK ? 1 : 0)
PHP_STREAM_TRUNCATE_SUPPORTED  255 main/streams/memory.c 				case PHP_STREAM_TRUNCATE_SUPPORTED:
PHP_STREAM_TRUNCATE_SUPPORTED  774 main/streams/plain_wrapper.c 				case PHP_STREAM_TRUNCATE_SUPPORTED: