#26702 [Opn->Bgs]: bin2hex compare with HEX value that equals DEC value of HEX of bin returns true

ID: 26702 Updated by: helly@php.net Reported By: bugs dot php dot net at zetafleet dot com -Status: Open +Status: Bogus Bug Type: Scripting Engine problem Operating System: Win32; Cygwin x86 PHP Version: 4.3.3 New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php The problem here is that bin2hey returns a string without the '0x' to identify a hex number. Hence the string is interpreted as a decimal number (if possible) when compared to any number. To demonstrate: $ php -r 'var_dump(("0x".bin2hex("D")) == 0x44);' bool(true) Previous Comments: ------------------------------------------------------------------------ [2003-12-22 23:24:49] bugs dot php dot net at zetafleet dot com Description: ------------ This is complicated, so I'll try explaining as best I can. There is a binary file. The first byte is 0x44. Doing a comparison (==) to 0x2C returns "TRUE" because 44 is the decimal for 0x2C. The decimal value of 0x44 is 68. This should return "FALSE" but does not. Reproduce code: --------------- (bin2hex("D") == 0x2C) RETURNS TRUE; SHOULD RETURN FALSE; (bin2hex("D") == 0x44) RETURNS FALSE; SHOULD RETURN TRUE; (bin2hex("D") == 44) RETURNS TRUE; SHOULD RETURN TRUE; Expected result: ---------------- print(bin2hex("D") == 0x2C) //prints nothing print(bin2hex("D") == 0x44) //prints '1' print(bin2hex("D") == 44) //prints '1' Actual result: -------------- print(bin2hex("D") == 0x2C) //prints '1' print(bin2hex("D") == 0x44) //prints nothing print(bin2hex("D") == 44) //prints '1' ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=26702&edit=1