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<html><head><title>Index: U (CGI Programming with Perl)</title></head><body bgcolor="#FFFFFF" text="#000000"><!-- START OF BODY --><!-- TOP BANNER --><p><img src="../gifs/smbanns.gif" usemap="#banner-map" border=0 alt="Book Home" ></a></p><map name="banner-map"><area alt="CGI Programming with Perl" href="../index.htm" coords="0,0,466,65" shape="rect" /><area alt="Search this book" href="../jobjects/fsearch.htm" coords="467,0,514,18" shape="rect" /></map></map><!-- TOP INDEX LINKS --><p><font size="-1"><a href="idx_0.htm">Symbols</a>| <a href="idx_a.htm">A</a>| <a href="idx_b.htm">B</a>| <a href="idx_c.htm">C</a>| <a href="idx_d.htm">D</a>| <a href="idx_e.htm">E</a>| <a href="idx_f.htm">F</a>| <a href="idx_g.htm">G</a>| <a href="idx_h.htm">H</a>| <a href="idx_i.htm">I</a>| <a href="idx_j.htm">J</a>| <a href="idx_k.htm">K</a>| <a href="idx_l.htm">L</a>| <a href="idx_m.htm">M</a>| <a href="idx_n.htm">N</a>| <a href="idx_o.htm">O</a>| <a href="idx_p.htm">P</a>| <a href="idx_q.htm">Q</a>| <a href="idx_r.htm">R</a>| <a href="idx_s.htm">S</a>| <a href="idx_t.htm">T</a>| <a href="idx_u.htm">U</a>| <a href="idx_v.htm">V</a>| <a href="idx_w.htm">W</a>| <a href="idx_x.htm">X</a>| <a href="idx_y.htm">Y</a>| <a href="idx_z.htm">Z</a></FONT><!-- INDEX SECTION BODY --><H1>Index: U</H1><DL><a name="unbuffering-output-stream"><dt>unbuffering output stream: <a href="../ch15_02.htm#INDEX-2964">15.2.6. Unbuffer Output Stream</a></dt><a name="undef-vs.-"><dt>undef vs. (): <a href="../ch17_01.htm#INDEX-3171">17.1.5. undef Versus ( )</a></dt><a name="underscores-_"><dt>underscores (_)</dt><dd><dl> <a name="filenames-replacing-characters-with"> <dt>filenames, replacing characters with: <a href="../ch05_02.htm#INDEX-1024">5.2.4. File Uploads with CGI.pm</a></dt> <a name="nonalphanumeric-parameter-name-characters-replacing-with"> <dt>nonalphanumeric parameter name characters, replacing with: <a href="../ch05_02.htm#INDEX-1014">5.2.3. Exporting Parameters to a Namespace</a></dt> <a name="use-in-Perl"> <dt>use in Perl: <a href="../ch16_02.htm#INDEX-3114">16.2. Coding Guidelines</a></dt> </dl></dd><a name="Unicode-compliant-data-transport-XML"><dt>Unicode-compliant data transport, XML: <a href="../ch14_02.htm#INDEX-2720">14.2. An Introduction to XML</a></dt><a name="unique-identifiers"><dt>unique identifiers</dt><dd><dl> <a name="generating-for-sessions"> <dt>generating for sessions: <a href="../ch11_02.htm#INDEX-2226">11.2. Hidden Fields</a></dt> <a name="in-hidden-field"> <dt>in hidden field: <a href="../ch11_02.htm#INDEX-2223">11.2. Hidden Fields</a></dt> <a name="inserting-into-HTML-documents-module-for"> <dt>inserting into HTML documents, module for: <a href="../ch11_01.htm#INDEX-2204">11.1. Query Strings and Extra Path Information</a></dt> <a name="mod_unique_id-module-building-with"> <dt>mod_unique_id module, building with: <a href="../ch11_01.htm#INDEX-2201">11.1. Query Strings and Extra Path Information</a></dt> <a name="passing-with-HTTP-requests"> <dt>passing with HTTP requests: <a href="../ch11_01.htm#INDEX-2169">11. Maintaining State</a></dt> </dl></dd><a name="Unisys-patent-on-LZW-compression-algorithm"><dt>Unisys patent on LZW compression algorithm: <a href="../ch13_01.htm#INDEX-2460">13.1.1.1. The LZW patent</a></dt><a name="Unix-operating-system"><dt>Unix operating system</dt><dd><dl> <a name="binmode-function-not-supporting"> <dt>binmode function, not supporting: <a href="../ch13_02.htm#INDEX-2501">13.2.1.1. binmode</a></dt> <a name="ColdFusion-language-versions-for"> <dt>ColdFusion language, versions for: <a href="../ch01_03.htm#INDEX-109">1.3.2. Alternatives to CGI</a></dt> <a name="commands-to-locate-perl"> <dt>commands to locate perl: <a href="../ch15_01.htm#INDEX-2880">15.1.2. The Pound-Bang</a></dt> <a name="executable-files-commands-for"> <dt>executable files, commands for: <a href="../ch01_02.htm#INDEX-71">1.2.2. Invoking CGI Scripts</a></dt> <a name="executables-differentiating-in-filesystem"> <dt>executables, differentiating in filesystem: <a href="../ch01_02.htm#INDEX-67">1.2.2. Invoking CGI Scripts</a></dt> <a name="file-permissions"> <dt>file permissions: <a href="../ch10_01.htm#INDEX-1959">10.1.2. Write Permissions</a></dt> <a name="forward-slashes---separating-directories"> <dt>forward slashes (/) separating directories: <a href="../ch12_03.htm#INDEX-2430">12.3.1. Search Application</a></dt> <a name="Perl"> <dt>Perl</dt><dd><dl> <a name="linefeed-and-carriage-return-representing-on"> <dt>linefeed and carriage return, representing on: <a href="../ch03_03.htm#INDEX-584">3.3.1.1. Outputting documents</a></dt> <a name="speediness-on"> <dt>speediness on: <a href="../ch01_03.htm#INDEX-89">1.3.1. Why Perl?</a></dt> </dl></dd> <a name="sendmail-on"> <dt>sendmail on: <a href="../ch09_04.htm#INDEX-1847">9.4. sendmail</a></dt> <a name="uptime-command"> <dt>uptime command: <a href="../ch13_03.htm#INDEX-2524">13.3.2. Using GD</a></dt> <a name="variables"> <dt>variables (see <a href="idx_e.htm#environment-variables">environment variables</a>)</dt> </dl></dd><a name="unsolicited-bulk-email"><dt>unsolicited bulk email (see <a href="idx_s.htm#spam">spam</a>)</dt><a name="untainting-data"><dt>untainting data: <a href="../ch08_04.htm#INDEX-1743">8.4.3. How Taintedness Is Removed</a></dt><dd><dl> <a name="fgrep-command-search"> <dt>fgrep command search: <a href="../ch12_01.htm#INDEX-2310">12.1. Searching One by One</a></dt> </dl></dd><a name="untying-hash-tables-from-database-files"><dt>untying hash tables from database files: <a href="../ch10_02.htm#INDEX-2039">10.2.1. DB_File</a></dt><a name="update-query-screen"><dt>update query screen: <a href="../ch10_04.htm#INDEX-2141">10.4.2.2. Address book CGI script</a></dt><a name="updating-databases"><dt>updating databases: <a href="../ch10_03.htm#INDEX-2076">10.3.4. Updating Data</a></dt><a name="updating-HTML-documents-with-links"><dt>updating HTML documents with links: <a href="../ch05_03.htm#INDEX-1097">5.3.1.4. Specifying an alternative target</a></dt><a name="upload-method-CGI.pm"><dt>upload method (CGI.pm): <a href="../ch05_02.htm#INDEX-1032">5.2.4. File Uploads with CGI.pm</a></dt><a name="UPLOAD_DIR"><dt>UPLOAD_DIR: <a href="../ch05_02.htm#INDEX-1045">5.2.4. File Uploads with CGI.pm</a></dt><a name="uploading-files"><dt>uploading files</dt><dd><dl> <a name="handling-with-CGI.pm"> <dt>handling with CGI.pm: <a href="../ch05_02.htm#INDEX-1016">5.2.4. File Uploads with CGI.pm</a></dt> </dl></dd><a name="uppercase-use-in-request-methods"><dt>uppercase, use in request methods: <a href="../ch02_03.htm#INDEX-301">2.3.1. The Request Line</a></dt><a name="uptime-Unix-system-command"><dt>uptime Unix system command: <a href="../ch13_03.htm#INDEX-2523">13.3.2. Using GD</a></dt><dd><dl> <dt><a href="../ch13_03.htm#INDEX-2532">13.3.2. Using GD</a></dt></dl></dd><a name="URI-module"><dt>URI module: <a href="../ch14_01.htm#INDEX-2696">14.1.2. IO::Socket</a></dt><a name="URIs-Uniform-Resource-Identifiers"><dt>URIs (Uniform Resource Identifiers): <a href="../ch02_01.htm#INDEX-178">2.1. URLs</a></dt><a name="URI-:-:URL-module"><dt>URI::URL module: <a href="../ch02_01.htm#INDEX-241">2.1.3. URL Encoding</a></dt><a name="url-method-CGI.pm"><dt>url method (CGI.pm): <a href="../ch05_02.htm#INDEX-986">5.2.1.6. url</a></dt><a name="url_escape-and-url_unescape-functions"><dt>url_escape and url_unescape functions: <a href="../ch02_01.htm#INDEX-245">2.1.3. URL Encoding</a></dt><a name="URLs-Uniform-Resource-Locators"><dt>URLs (Uniform Resource Locators): <a href="../ch01_01.htm#INDEX-6">1.1. History</a></dt><dd><dl> <dt><a href="../ch02_01.htm#INDEX-175">2.1. URLs</a></dt> <a name="absolute-and-relative"> <dt>absolute and relative: <a href="../ch02_01.htm#INDEX-214">2.1.2. Absolute and Relative URLs</a></dt> <a name="base-for-relative-URLs-in-HTML-documents">?? 快捷鍵說明
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