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<?php var_dump(CRYPT_BLOWFISH); echo crypt('rasmuslerdorf', '$2a$11$12345678901234567890$') . "\n";
Output for 8.0.28 - 8.0.30, 8.1.16 - 8.1.27, 8.2.3 - 8.2.17, 8.3.0 - 8.3.4
int(1) *0
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.21 - 5.5.38, 5.6.5 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.0.27, 8.1.0 - 8.1.15, 8.2.0 - 8.2.2
int(1) $2a$11$12345678901234567890$.iuCXkScESX/tsLB4k01cqN2T7AvOc9S
Output for 5.5.0 - 5.5.20, 5.6.0 - 5.6.4
int(1) $2a$11$12345678901234567890$uiuCXkScESX/tsLB4k01cqN2T7AvOc9S
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
int(0)
Process exited with code 139.

preferences:
311.47 ms | 402 KiB | 396 Q