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<?php define('FD', fopen('/dev/null','rw')); stream_filter_append(FD, "php_user_filter");
Output for 8.3.0 - 8.3.6
Warning: fopen(): open_basedir restriction in effect. File(/dev/null) is not within the allowed path(s): (/tmp:/in:/etc) in /in/gaZ3t on line 2 Warning: fopen(/dev/null): Failed to open stream: Operation not permitted in /in/gaZ3t on line 2 Fatal error: Uncaught TypeError: stream_filter_append(): Argument #1 ($stream) must be of type resource, false given in /in/gaZ3t:3 Stack trace: #0 /in/gaZ3t(3): stream_filter_append(false, 'php_user_filter') #1 {main} thrown in /in/gaZ3t on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: fopen(): open_basedir restriction in effect. File(/dev/null) is not within the allowed path(s): (/tmp:/in:/etc) in /in/gaZ3t on line 2 Warning: fopen(/dev/null): Failed to open stream: Operation not permitted in /in/gaZ3t on line 2 Fatal error: Uncaught TypeError: stream_filter_append(): Argument #1 ($stream) must be of type resource, bool given in /in/gaZ3t:3 Stack trace: #0 /in/gaZ3t(3): stream_filter_append(false, 'php_user_filter') #1 {main} thrown in /in/gaZ3t on line 3
Process exited with code 255.
Output for 8.0.13
Warning: stream_filter_append(): Unable to locate filter "php_user_filter" in /in/gaZ3t on line 3
Output for 4.4.3 - 4.4.9, 5.1.5 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 7.3.32 - 7.3.33, 7.4.26, 7.4.33
Warning: stream_filter_append(): unable to locate filter "php_user_filter" in /in/gaZ3t on line 3
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.32
Warning: fopen(): open_basedir restriction in effect. File(/dev/null) is not within the allowed path(s): (/tmp:/in:/etc) in /in/gaZ3t on line 2 Warning: fopen(/dev/null): failed to open stream: Operation not permitted in /in/gaZ3t on line 2 Warning: stream_filter_append() expects parameter 1 to be resource, bool given in /in/gaZ3t on line 3
Output for 5.6.0 - 5.6.38, 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(/dev/null) is not within the allowed path(s): (/tmp:/in:/etc) in /in/gaZ3t on line 2 Warning: fopen(/dev/null): failed to open stream: Operation not permitted in /in/gaZ3t on line 2 Warning: stream_filter_append() expects parameter 1 to be resource, boolean given in /in/gaZ3t on line 3
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.2, 5.0.0 - 5.0.5, 5.1.0 - 5.1.4
Warning: stream_filter_append(): unable to create or locate filter "php_user_filter" in /in/gaZ3t on line 3
Output for 4.3.0 - 4.3.1
Warning: stream_filter_append() [http://www.php.net/function.stream-filter-append]: unable to create or locate filter "php_user_filter" in /in/gaZ3t on line 3

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