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<?php ob_start(); ini_set('session.use_strict_mode', 1); session_start(); $orig = session_id(); session_regenerate_id(); $new = session_id(); var_dump(strlen($orig),strlen($new)); session_commit(); ini_set('session.hash_function','sha1'); session_id('invalid'); session_start(); $orig = session_id(); session_regenerate_id(); $new = session_id(); var_dump(strlen($orig),strlen($new));
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
int(32) int(32) int(32) int(32)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
int(32) int(32) int(40) int(40)

preferences:
115.34 ms | 407 KiB | 5 Q