Bug #80803 [NEW]: socket_read() reference to global socket fails in user function

From: janui at onmat dot com Operating system: Linux 5.10.14-2-ARCH armv7l PHP version: 8.0.2 Package: *Data Exchange functions Bug Type: Bug Bug description:socket_read() reference to global socket fails in user function Description: ------------ --- From manual page: https://php.net/function.socket-read --- When a user function contains a socket_read() which references a globally defined socket object it fails to connect to and read the socket. When the same code used in the top-level script it works correctly. The problem is not present in the socket_connect(), socket_write() and socket_close() functions. function user_function_read_socket($socketVariableName) { $buff = 4096; global $$socketVariableName; echo $socketVariableName."\n"; var_dump($$socketVariableName); $response = socket_read($$socketVariableName, $buff, PHP_NORMAL_READ); echo $response."\n"; echo socket_strerror(socket_last_error($$socketVariableName))."\n"; } The following similar construction has no effect on the result: $response = socket_read($GLOBALS[$socketVariableName], $buff, PHP_NORMAL_READ); Test script: --------------- See description. A full test script can be delivered., something like this: <?php function user_function_open_socket($socketVariableName) {...} function user_function_write_socket($socketVariableName, $command) {...} function user_function_read_socket($socketVariableName) {...see description...} function user_function_close_socket($socketVariableName) {...} $socketVariableName = 'testSocketName'; $command = 'a valid command'; user_function_open_socket($socketVariableName); user_function_write_socket($socketVariableName, $command); user_function_read_socket($socketVariableName); // paste the code from the read function here user_function_close_socket($socketVariableName); Expected result: ---------------- I would expect the code to work in the same way regardless of being used in the top level script as in a user function. -- Edit bug report at https://bugs.php.net/bug.php?id=80803&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80803&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80803&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80803&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80803&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80803&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80803&r=support Expected behavior: https://bugs.php.net/fix.php?id=80803&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80803&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80803&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80803&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80803&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80803&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80803&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80803&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80803&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80803&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80803&r=mysqlcfg