3v4l.org

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<?php foreach(array(STDIN,STDOUT,STDERR,tmpfile()) as $resource){ var_dump(unserialize(serialize($resource))); }
Output for 5.3.4, 5.5.6, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
int(0) int(0) int(0) int(0)
Output for 4.3.7 - 4.3.11, 4.4.0, 5.0.0, 5.1.0, 5.2.0
Notice: Use of undefined constant STDIN - assumed 'STDIN' in /in/hcPKv on line 2 Notice: Use of undefined constant STDOUT - assumed 'STDOUT' in /in/hcPKv on line 2 Notice: Use of undefined constant STDERR - assumed 'STDERR' in /in/hcPKv on line 2 string(5) "STDIN" string(6) "STDOUT" string(6) "STDERR" int(0)
preferences:
101.85 ms | 1991 KiB | 4 Q