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<?php $fp1 = fopen("/tmp/lock.test", 'w+'); $fp2 = fopen("/tmp/lock.test", 'w+'); flock($fp1, LOCK_EX); fclose($fp1); unlink("/tmp/lock.test"); $fp2IsLockedAndFileIsDeleted = flock($fp2, LOCK_EX) && !file_exists("/tmp/lock.test"); var_dump($fp2IsLockedAndFileIsDeleted);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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 - 8.3.29, 8.4.1 - 8.4.17, 8.5.0 - 8.5.2
bool(true)

preferences:
150 ms | 408 KiB | 5 Q