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<?php function a () { return debug_backtrace(); } function b () { return a(); } var_dump(b());
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { [0]=> array(4) { ["file"]=> string(9) "/in/BYm3F" ["line"]=> int(6) ["function"]=> string(1) "a" ["args"]=> array(0) { } } [1]=> array(4) { ["file"]=> string(9) "/in/BYm3F" ["line"]=> int(8) ["function"]=> string(1) "b" ["args"]=> array(0) { } } }