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<?php print("\"6\" == \" 6\" : "); var_dump("6" == " 6"); print('"4.2" == "4.20" : '); var_dump("4.2" == "4.20"); print('"133" == "0133" : '); var_dump("133" == "0133"); print('133 == 0133 : '); var_dump(133 == 0133); print('"0x10" == "16" : '); var_dump("0x10" == "16"); print('"1e3" == "1000" : '); var_dump("1e3" == "1000");