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<?php function a() { var_dump(debug_backtrace()); } a();
based on I6MW1
Output for 4.3.0 - 7.2.0
array(1) { [0]=> array(4) { ["file"]=> string(9) "/in/NWDe0" ["line"]=> int(8) ["function"]=> string(1) "a" ["args"]=> array(0) { } } }