--TEST-- Test ~N operator : various numbers as strings --FILE-- <?php $strVals = array( "0","65","-44", "1.2", "-7.7", "abc", "123abc", "123e5", "123e5xyz", " 123abc", "123 abc", "123abc ", "3.4a", "a5.9" ); foreach ($strVals as $strVal) { echo "--- testing: '$strVal' ---\n"; var_dump(bin2hex(~$strVal)); } ?> --EXPECT-- --- testing: '0' --- string(2) "cf" --- testing: '65' --- string(4) "c9ca" --- testing: '-44' --- string(6) "d2cbcb" --- testing: '1.2' --- string(6) "ced1cd" --- testing: '-7.7' --- string(8) "d2c8d1c8" --- testing: 'abc' --- string(6) "9e9d9c" --- testing: '123abc' --- string(12) "cecdcc9e9d9c" --- testing: '123e5' --- string(10) "cecdcc9aca" --- testing: '123e5xyz' --- string(16) "cecdcc9aca878685" --- testing: ' 123abc' --- string(14) "dfcecdcc9e9d9c" --- testing: '123 abc' --- string(14) "cecdccdf9e9d9c" --- testing: '123abc ' --- string(14) "cecdcc9e9d9cdf" --- testing: '3.4a' --- string(8) "ccd1cb9e" --- testing: 'a5.9' --- string(8) "9ecad1c6"