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<?php var_dump(headers_sent()); // false var_dump(headers_sent()); //true
based on BS6sh
Output for 5.2.3 - 7.1.10
bool(false) bool(true)
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.2.2
bool(true) bool(true)
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/95sC7 on line 3
Process exited with code 255.