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-e (checking file status) 199
each function 132
editors, text. See text editors
elements, of an array 25
else 107
elsif 108
e-mail
address, for book 20, 22
preparing to send output 207
security 237
sending output via 208
%ENV hash 59
See also environment variables
environment variables 59-64
See also hashes 127
and parsing forms 60
CONTENT_LENGTH 61
HTTP_COOKIE 174
HTTP_REFERER 63
HTTP_USER_AGENT 62
inputting data 68
QUERY_STRING 61
REQUEST_METHOD 60
viewing all 64
eq (equal to), comparison operator 103
error messages 214
errors
common 212213
“Document contains no data” 193
subroutine 192, 214
exclamation point (!) 32, 102
exclusive access 194
executing
commands in Unix 242
scripts 41
permissions 231
exists function 135
exit
Perl function 192, 214
Unix command 241
expanding
files, in Unix server 251
scripts 220
expiration date, for cookies 170
exponential powers 77
extensions of scripts 31
downloaded uncompressed 220
for subroutines 124
external files. See files
external subroutines 124
using 125
extra returns 210
Extropia.com 256

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This index is from my book, Perl and CGI for the World Wide Web: Visual QuickStart Guide, published by Peachpit Press.