Online PHP editor | output for EGfFN

Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5: int(1) int(2) int(3)
Output for 5.6.0 - 5.6.40: Warning: Constants may only evaluate to scalar values in /in/EGfFN on line 3 Notice: Use of undefined constant FOO - assumed 'FOO' in /in/EGfFN on line 9 Warning: Only arrays and Traversables can be unpacked in /in/EGfFN on line 9 Warning: Missing argument 1 for f(), called in /in/EGfFN on line 9 and defined in /in/EGfFN on line 5 Warning: Missing argument 2 for f(), called in /in/EGfFN on line 9 and defined in /in/EGfFN on line 5 Warning: Missing argument 3 for f(), called in /in/EGfFN on line 9 and defined in /in/EGfFN on line 5 Notice: Undefined variable: a in /in/EGfFN on line 6 Notice: Undefined variable: b in /in/EGfFN on line 6 Notice: Undefined variable: c in /in/EGfFN on line 6 NULL NULL NULL