These functions all return a list of strings.

resources/functionMap.php

@@ -11725,11 +11725,11 @@
 'stream_filter_register' => ['bool', 'filtername'=>'string', 'classname'=>'string'],
 'stream_filter_remove' => ['bool', 'stream_filter'=>'resource'],
 'stream_get_contents' => ['string|false', 'source'=>'resource', 'maxlen='=>'int', 'offset='=>'int'],
-'stream_get_filters' => ['array'],
+'stream_get_filters' => ['list<string>'],
 'stream_get_line' => ['string|false', 'stream'=>'resource', 'maxlen'=>'int', 'ending='=>'string'],
 'stream_get_meta_data' => ['array{timed_out:bool,blocked:bool,eof:bool,unread_bytes:int,stream_type:string,wrapper_type:string,wrapper_data:mixed,mode:string,seekable:bool,uri:string,mediatype?:string,base64?:bool}', 'fp'=>'resource'],
-'stream_get_transports' => ['array'],
-'stream_get_wrappers' => ['array'],
+'stream_get_transports' => ['list<string>'],
+'stream_get_wrappers' => ['list<string>'],
 'stream_is_local' => ['bool', 'stream'=>'resource|string'],
 'stream_isatty' => ['bool', 'stream'=>'resource'],
 'stream_notification_callback' => ['callback', 'notification_code'=>'int', 'severity'=>'int', 'message'=>'string', 'message_code'=>'int', 'bytes_transferred'=>'int', 'bytes_max'=>'int'],