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<?php header_register_callback(function(){ $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS); foreach($backtrace as $frame){ if(isset($frame['file'], $frame['line'])){ echo "Output started: {$frame['file']}:{$frame['line']}\n"; break; } } }); echo "data";
Output for git.master, git.master_jit, rfc.property-hooks
Output started: /in/vm8KO:13 data

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