& (ampersand), XML, 313, 402
.= (appendination operator), 75
* (asterisk)
SELECT statement, 39
shell wildcard, 120
%book hash, 69
_callback, 306–307
$caller variable, 82
^ (caret), regular expressions, 57, 202
/cgi-bin/ directory, 106
{ }, curly brackets, 34
\d (digit character class), regular expressions, 203, 436
$dbh variable, 19
$_, default variable, 156
$ (dollar sign), regular expression, 203
... (ellipsis), 192
$ENV variable, 186, 189, 197
$errstr, 21
= (equal sign), 42
.exe file extension, 487
$field variable, 44
%fields hash, 80
<form> tag, 106, 230
$hdl_search handle, 81
@INC array
index.cgi, 185
view_item.cgi, 196
$index variable, 49
$MainWin, 87
1NF. See First Normal Form
2NF. See Second Normal Form
3NF. See Third Normal Form
\n (newline), 18
||= (or-equals) assignment operator, 352
% (percent), SQL wildcard, 120
. (period)
concatenation operator, 70
current directory, 184
$person_add_b button declaration, graphical phonebook application, 361
+ (plus sign), regular expressions, 57, 203
? (question mark), regular expression, 203
\S (nonspace characters), regular expressions, 351
‘ (single quote), 203
[ ] (square brackets), character class, 202
-T switch (taint mode), Perl script, 112
<textarea> tag, 108
%%, variable substitution, 255
-w switch (warnings), Perl script, 17, 19
\W (nonword characters), regular expressions, 57
\w (word characters), regular expression, 202