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<?php echo file_get_contents(popen('echo "hello";', 0));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ValueError: popen(): Argument #2 ($mode) must be one of "r", "rb", "w", or "wb" in /in/lvn8r:2 Stack trace: #0 /in/lvn8r(2): popen('echo "hello";', '0') #1 {main} thrown in /in/lvn8r on line 2
Process exited with code 255.

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