php Programming Glossary: xf4

http://stackoverflow.com/questions/1055728/php-session-with-an-incomplete-object

http://stackoverflow.com/questions/11709410/regex-to-detect-invalid-utf-8-string

Start xE0 xEF x80 xBF 2 # Invalid UTF 8 Sequence Start xF0 xF4 x80 xBF 3 # Invalid UTF 8 Sequence Start x0 x7F xF5 xFF x80.. UTF 8 Sequence Middle xC2 xDF xE0 xEF xE0 xEF x80 xBF xF0 xF4 xF0 xF4 x80 xBF xF0 xF4 x80 xBF 2 x80 xBF # Overlong Sequence.. Middle xC2 xDF xE0 xEF xE0 xEF x80 xBF xF0 xF4 xF0 xF4 x80 xBF xF0 xF4 x80 xBF 2 x80 xBF # Overlong Sequence xE0 xEF..

Ensuring valid utf-8 in PHP

http://stackoverflow.com/questions/1523460/ensuring-valid-utf-8-in-php

xBF x80 xBF 2 # planes 1 3 xF1 xF3 x80 xBF 3 # planes 4 15 xF4 x80 x8F x80 xBF 2 # plane 16 xs' string return string else return..

Replacing invalid UTF-8 characters by question marks, mbstring.substitute_character seems ignored

http://stackoverflow.com/questions/8215050/replacing-invalid-utf-8-characters-by-question-marks-mbstring-substitute-charac

on the range of lead bytes. lead byte 0x00 0x7F 0xC2 0xF4 trail byte 0x80 or 0x90 or 0xA0 0xBF or 0x8F you can refer to.. 2 # U 10000 U 3FFFF xF1 xF3 x80 xBF 3 # U 40000 U FFFFF xF4 x80 x8F x80 xBF 2 # U 100000 U 10FFFF xE0 xA0 xBF # U 0800.. invalid xF1 xF3 x80 xBF 1 2 # U 40000 U FFFFF invalid xF4 x80 x8F x80 xBF # U 100000 U 10FFFF invalid . # invalid 1 byte..