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<?php echo file_get_contents(popen('/bin/bash -c echo "hello";', 'r'));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: popen(/bin/bash -c echo "hello";,r): Cannot allocate memory in /in/V4kcB on line 2 Fatal error: Uncaught ValueError: Path cannot be empty in /in/V4kcB:2 Stack trace: #0 /in/V4kcB(2): file_get_contents('') #1 {main} thrown in /in/V4kcB on line 2
Process exited with code 255.
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33
Warning: popen(/bin/bash -c echo "hello";,r): Cannot allocate memory in /in/V4kcB on line 2 Warning: file_get_contents(): Filename cannot be empty in /in/V4kcB on line 2
Output for 5.4.39 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.6, 7.4.0
Warning: file_get_contents() expects parameter 1 to be a valid path, resource given in /in/V4kcB on line 2
Output for 5.4.0 - 5.4.38
Warning: file_get_contents() expects parameter 1 to be a valid path, resource given in /in/V4kcB on line 2 sh: 1: /bin/bash: not found
Output for 4.3.1 - 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, 5.3.0 - 5.3.29
Warning: file_get_contents() expects parameter 1 to be string, resource given in /in/V4kcB on line 2 sh: 1: /bin/bash: not found
Output for 4.3.0
Warning: file_get_contents() expects parameter 1 to be string, resource given in /in/V4kcB on line 2

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