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<?php $fo = fopen('lock.txt', 'r+'); if (flock($fo, LOCK_EX)) { // File was not locked, You have locked it successfully right now, do your logic flock($fo, LOCK_UN); // unlock file afer script logic } else { // File is locked right now, don't run script }
Output for 8.3.0 - 8.3.6
Warning: fopen(): open_basedir restriction in effect. File(lock.txt) is not within the allowed path(s): (/tmp:/in:/etc) in /in/YPSqu on line 2 Warning: fopen(lock.txt): Failed to open stream: Operation not permitted in /in/YPSqu on line 2 Fatal error: Uncaught TypeError: flock(): Argument #1 ($stream) must be of type resource, false given in /in/YPSqu:3 Stack trace: #0 /in/YPSqu(3): flock(false, 2) #1 {main} thrown in /in/YPSqu on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: fopen(): open_basedir restriction in effect. File(lock.txt) is not within the allowed path(s): (/tmp:/in:/etc) in /in/YPSqu on line 2 Warning: fopen(lock.txt): Failed to open stream: Operation not permitted in /in/YPSqu on line 2 Fatal error: Uncaught TypeError: flock(): Argument #1 ($stream) must be of type resource, bool given in /in/YPSqu:3 Stack trace: #0 /in/YPSqu(3): flock(false, 2) #1 {main} thrown in /in/YPSqu on line 3
Process exited with code 255.
Output for 8.0.13
Warning: fopen(lock.txt): Failed to open stream: No such file or directory in /in/YPSqu on line 2 Fatal error: Uncaught TypeError: flock(): Argument #1 ($stream) must be of type resource, bool given in /in/YPSqu:3 Stack trace: #0 /in/YPSqu(3): flock(false, 2) #1 {main} thrown in /in/YPSqu on line 3
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.33
Warning: fopen(lock.txt): failed to open stream: No such file or directory in /in/YPSqu on line 2 Warning: flock() expects parameter 1 to be resource, bool given in /in/YPSqu on line 3
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.32
Warning: fopen(): open_basedir restriction in effect. File(lock.txt) is not within the allowed path(s): (/tmp:/in:/etc) in /in/YPSqu on line 2 Warning: fopen(lock.txt): failed to open stream: Operation not permitted in /in/YPSqu on line 2 Warning: flock() expects parameter 1 to be resource, bool given in /in/YPSqu on line 3
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: fopen(): open_basedir restriction in effect. File(lock.txt) is not within the allowed path(s): (/tmp:/in:/etc) in /in/YPSqu on line 2 Warning: fopen(lock.txt): failed to open stream: Operation not permitted in /in/YPSqu on line 2 Warning: flock() expects parameter 1 to be resource, boolean given in /in/YPSqu on line 3
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
Warning: fopen(lock.txt): failed to open stream: No such file or directory in /in/YPSqu on line 2 Warning: flock() expects parameter 1 to be resource, boolean given in /in/YPSqu on line 3
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: fopen(lock.txt): failed to open stream: No such file or directory in /in/YPSqu on line 2 Warning: flock(): supplied argument is not a valid stream resource in /in/YPSqu on line 3
Output for 4.3.0 - 4.3.1
Warning: fopen(lock.txt) [http://www.php.net/function.fopen]: failed to create stream: No such file or directory in /in/YPSqu on line 2 Warning: flock(): supplied argument is not a valid stream resource in /in/YPSqu on line 3
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