Fatal error: Uncaught TypeError: flock(): Argument #1 ($stream) must be of type resource, bool given in /var/www/html/phpkobo/my-projects/ajax-poll-auto-reset/APARS-325J/reset-proc/test-lock/lock.php:7 Stack trace: #0 /var/www/html/phpkobo/my-projects/ajax-poll-auto-reset/APARS-325J/reset-proc/test-lock/lock.php(7): flock(false, 2) #1 {main} thrown in /var/www/html/phpkobo/my-projects/ajax-poll-auto-reset/APARS-325J/reset-proc/test-lock/lock.php on line 7