b formatting directive, sprintf() function, 303
backslash (\), 33, 43, 87
Basic HTTP authentication
overview, 136–137
PHP authentication variables, 140–141
users and group files, creating, 137–138
Web servers, configuring, 138–139
bindec() function, 290–291
block-level tags, 23–24
<BODY> tag, 25
bold text, table headings, 27
brackets ([ ]), 29
browser-specific code, displaying, 61–63