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(page 18--see Scalars Chapter)
The files from this chapter can be found in the basics folder.
| page | section | HTML | Perl |
| 38 | Creating Output for a Browser | animal.html | animal.cgi |
| 39 | Documenting Your Script | comments.html comments_inline.html |
comments.cgi comments_inline.cgi |
| 40 | Checking the Script’s Syntax | -- | badmonkey.cgi |
There are no example files from this chapter.
The files from this chapter can be found in the unixserver folder.
| page | section | HTML | Perl |
| 51 | What About CGI.pm? | -- | getversion.cgi |
| 58 | Testing Your Unix Server | -- | unixtest.cgi |
The files from this chapter can be found in the winserver folder.
| page | section | HTML | Perl |
| 66 | Testing Your Server (Part 1) | test.html | none |
| 69 | Installing Scripts on Windows Servers | -- | perltest.pl |
| 70 | Testing Your Server (Part II) | -- | perltest.pl |
The files from this chapter can be found in the macserver folder.
| page | section | HTML | Perl |
| 77 | Testing the Server (Part 1) | test.html | none |
| 81 | Testing Your Server (Part II) | -- | test.cgi |
The files from this chapter can be found in the dataform folder.
| page | section | HTML | Perl |
| 84 | Labeling Incoming Data | namevalue.html | (namevalue.cgi) |
| 86-94 | Creating a Form | namevalue.html | (namevalue.cgi) |
| 95 | Using an Image To Submit Data | zonemap.html | (display_param.cgi) |
| 96 | Creating a Link to a Script | gettime.html | (gettime.cgi) |
| 97 | Using a Link to Input Data to a Script | getlocaltime.html | (getlocaltime.cgi) |
The files from this chapter can be found in the envvar folder.
| page | section | HTML | Perl |
| 100 | Your Visitor’s Browser and Platform | browser.cgi | |
| 101 | Viewing Available Environment Variables | envlist.cgi | |
| 102 | Storing Data from Environment Variables | storeenv.cgi |
The files from this chapter can be found in the input folder.
| page | section | HTML | Perl |
| 104 | Getting Single-Valued Form Data | singlevalue.html | singlevalue.cgi |
| 105 | Getting Multiple-Valued Form Data | multivalue.html | multivalue.cgi |
| 106 | Getting All the Form Element’s Names | allnames.html | allnames.cgi |
| 107 | Getting All the Names and Values | alldata.html | alldata.cgi |
The files from this chapter can be found in the scalars folder.
| page | section | HTML | Perl |
| 110-111 | Assigning a Value to a Scalar Variable | assignment.cgi assignment_declaration.cgi |
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| 112 | Multiplying, Dividing, Adding, Subtracting | math.html | math.cgi |
| 113 | Using More Than One Operator | precedence.cgi | |
| 114 | Raising a Number to an Exponential Power | exponents.html | exponents.cgi |
| 115 | Using Mathematical Functions | sqrt.html | sqrt.cgi |
| 116 | Getting the Remainder of a Division | modulus.html | modulus.cgi |
| 117 | Connecting Strings Together | concat.html | concat.cgi |
| 118 | Repeating a String | repeat.html | repeat.cgi |
| 119 | Operating and Assigning in One Step | binary.html | binary.cgi |
| 120 | Incrementing (or Decrementing) a Variable | increment.html | increment.cgi |
The files from this chapter can be found in the conditionals folder.
| page | section | HTML | Perl |
| 126 | Creating a Basic Conditional Statement | if.html | if.cgi |
| 127 | Adding Options for False Conditions | else.html | else.cgi |
| 128 | Adding Multiple, Independent Conditions | elsif.html | elsif.cgi |
| 129 | Using Unless | unless.html | unless.cgi |
| 130 | Repeating a Block for Each Item in an Array | foreach.html | foreach.cgi |
| 131 | Loading the Default Variable | foreach_default.html | foreach_default.cgi |
| 132 | Repeating a Block While a Condition Is True | while.html | while.cgi |
| 133 | Repeating a Block While a Condition Is False | until.html | until.cgi |
| 134 | Executing the Block at Least Once | dowhile.html | dowhile.cgi |
| 135 | Repeating a Block a Given Number of Times | for.html | for.cgi |
| 136 | Nesting Conditional Statements | nest.html | nest.cgi |
| 137 | Skipping a Loop Iteration | next.html | next.cgi |
| 138 | Jumping out of a Loop Altogether | last.html | last.cgi |
The files from this chapter can be found in the arrays folder.
| page | section | HTML | Perl |
| 140-141 | Assigning a List to an Array Variable | assign.cgi assign_time.cgi |
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| 142-143 | Referring to a Particular Item in an Array | gettingone.html |
gettingone.cgi |
| 144 | Referring to Multiple Items from an Array | getmulti.html | getmulti.cgi |
| 145 | Adding or Replacing an Item in an Array | replaceone.html | replaceone.cgi |
| 146-147 | Adding to the End or Beginning of an Array |
push.cgi unshift.cgi |
|
| 148 | Removing the Last Item from an Array | pop.html | pop.cgi |
| 149 | Removing the First Item from an Array | shift.html | shift.cgi |
| 150-151 | Replacing More Than One Item in an Array | replacemore.html | replacemore.cgi |
| 152 | Finding the Length of an Array | length.html | length.cgi |
| 153 | Modifying All the Members of an Array | modifyall.html | modifyall.cgi |
| 154 | Sorting Arrays | sort.html | sort.cgi |
| 155 | Reversing the Order of an Array’s Contents | reverse.html | reverse.cgi |
The files from this chapter can be found in the subroutines folder.
| page | section | HTML | Perl |
| 159 | Using a Simple Subroutine | simple_sub.cgi | |
| 160-161 | Creating/Calling a Subroutine That Takes Input |
input.html | input.cgi |
| 162 | Using a Subroutine's Return Value | return.html | return.cgi |
| 163 | Setting the Return Value Manually | return_manual.html | return_manual.cgi |
| 164-165 |
Storing Subroutines in an External File Calling Subroutines from an External File |
external.html | external.lib external.cgi |
The files from this chapter can be found in the hashes folder.
| page | section | HTML | Perl |
| 168 | Assigning a List to a Hash | assign_hash.html assign_hash_commas.html |
assign_hash.cgi assign_hash_commas.cgi |
| 169 | Getting a Value by Using a Key | getone.html | getone.cgi |
| 170 | Adding or Replacing a Key-Value Pair | addone.html | addone.cgi |
| 171 | Getting Several Values Using Keys | getmore.html | getmore.cgi |
| 172 | Getting All of a Hash’s Keys | keys.cgi | |
| 173 | Getting All of a Hash’s Values | values.cgi | |
| 174-175 | Getting Each Key and Value in a Hash | ||
| 176-177 | Getting the Pairs in a Specified Order | ||
| 178 | Removing Key-Value Pairs | delete.html | delete.cgi |
| 179 | Checking to See If a Key Exists | exists.html | exists.cgi |
The files from this chapter can be found in the regex folder.
| page | section | HTML | Perl |
| 182 | Finding Something | match.cgi | |
| 183 | Finding and Replacing | replace.html | replace.cgi |
| 184 | Seeing and Using What Was Found | whatwasfound.cgi | |
| 185 | Splitting a Value into Pieces | split.html | split.cgi |
| 188 | Matching a Single Character | matchone.html | matchone.cgi |
| 189 | Matching a String of Characters | sequence.html | sequence.cgi |
| 190 | Matching a Character from a Group | class.html | class.cgi |
| 191 | Matching a Character That’s Not in the Group | negclass.html | negclass.cgi |
| 192 | Using Class Shorthands | classshort.html | classshort.cgi |
| 193 | Limiting the Location | anchor.html | anchor.cgi |
| 195 | Choosing How Many to Match |
||
| 196 | To include optional elements | optional.html | optional.cgi |
| 197 | To match one or more elements | plus.html | plus.cgi |
| 198 | To include multiple optional elements | asterisk.html | asterisk.cgi |
| 199 | To match at least m and at most n elements | mandn,html | mandn.cgi |
| 201 | Matching One Element or Another | alternation.html | alternation.cgi |
| 202 | More on Using What You Already Matched | using.html | using.cgi |
The files from this chapter can be found in the remembering folder.
| page | section | HTML | Perl |
| 208-209 | Storing Collected Data in a Hidden Field | hidden.html |
hidden1.cgi |
| 212-213 | Sending a Cookie | sendcookie.html | sendcookie.cgi |
| 214 | Setting a Cookie’s Expiration Date | expires.html | expires.cgi |
| 215 | Limiting a Cookie to a Domain | domain.html | domain.cgi |
| 216 | Limiting a Cookie to a Part of Your Server | path.html | path.cgi |
| 217 | Limiting Cookies to Secure Connections | secure.html | secure.cgi |
| 218 | Reading and Using a Cookie | readcookie.cgi |
The files from this chapter can be found in the printhtml folder.
| page | section | HTML | Perl |
| 222 | Formatting Output with Perl | format.html | format.cgi |
| 223 | Creating a Format Pattern for Integers | padding.cgi | |
| 226 | Changing the Case | ucfirst.html | ucfirst.cgi |
| 227 | Changing Characters | tr.html | tr.cgi |
| 228 | Finding the Length of a String | length.html | length.cgi |
| 229 | Finding Where Something Is in a String | index.html | index.cgi |
| 230 | Extracting One String from Another | substr.html | substr.cgi |
| 231 | Cleaning up the End of a String | chop.html | chop.cgi |
| 232-233 | Formatting Output with HTML | html.cgi html_linebreaks.cgi |
|
| 234 | Printing Several Lines at a Time | here.cgi | |
| 235 | Simplifying Paths to Images and Links | base.cgi | |
| 236 | Outputting Data in a Table | table.cgi |
The files from this chapter can be found in the security folder.
| page | section | HTML | Perl |
| 238 | Reading the Security FAQs |
Lincoln Stein’s World Wide Web Security FAQ Security Issues When Installing and Customizing Pre-Built Web Scripts, by Selena Sol |
|
| 239 | The Problem with Visitor Input | visitorinput.cgi visitorinput2.cgi |
|
| 241 | Limiting Access to Files | fileaccess.cgi | |
| 242 | Using CGI.pm to Limit Incoming Data | limitinput.html | limitinput.cgi |
| 243 | Avoiding Tainted Data | taintcheck_before.html | taintcheck_before.cgi |
| 244 | Cleaning and Using Outside Data | taintcheck_after.cgi |
The files from this chapter can be found in the files folder. I'm afraid the links below are no longer live. People were just too weird about the comments they posted.
| page | section | HTML | Perl |
| 248-249 | Opening a File | (writetolog.cgi) | |
| 250 | Verifying File and Directory Operations | (writetolog.cgi) | |
| 251 | Writing to an External File | writetolog.html | writetolog.cgi |
| 252 | Getting Exclusive Access to a File | flock.html | flock.cgi |
| 253 | Reading Data from an External File | (link appears in output from writetolog.html) | readfromlog.cgi |
| 254 | Closing a File | (readfromlog.cgi) | |
| 255 | Renaming a File | rename.html | rename.cgi |
| 256 | Removing a File | delete.html | delete.cgi |
| 257 | Checking a File’s Status | exists.html | exists.cgi |
| 258 | Opening a Directory | (readdir.cgi) | |
| 259 | Reading the Contents of a Directory | readdir.html | readdir.cgi |
| 260 | Closing a Directory | (readdir.cgi) | |
| 261 | Changing the Working Directory | chdir.html | chdir.cgi |
| 262 | Creating a Directory | mkdir.html | mkdir.cgi |
| 263 | Changing Permissions from within a Script | chmod.html | chmod.cgi |
| 264 | Removing a Directory | rmdir.html | rmdir.cgi |
| 265-267 |
Getting Ready to E-mail Output Sending Output via E-mail |
formmail.html | formmail.cgi |
The files from this chapter can be found in the uploading folder.
| page | section | HTML | Perl |
| 270 | Creating a Form for Uploading Files | uploading.html | (uploading.cgi) |
| 271 | Getting the Name of the Uploaded File | filename.html | filename.cgi |
| 272 | Finding out a File’s MIME Type | mimetype.html | mimetype.cgi |
|
273-274 |
Specifying Where the File Should Be Saved Reading in and Limiting Uploaded Files |
uploading.html | uploading.cgi |
The files from this chapter can be found in the debugging folder.
| page | section | HTML | Perl |
| 280 | Creating an Error Subroutine | error.lib | |
| 281 | Using Perl’s Error Reporting | die_carp.cgi | |
| 283 | Isolating the Problem | isolating.cgi | |
| 284 | Following a Variable’s Progress | progress.cgi |
| page | section | URL |
| 310 | Text Editors | |
| 311 | Telnet Programs | |
| 312 | Other Folks' Scripts | |
| 313 | Learning More |