AJAX and PHP

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AJAX Suggest and AutocompleteIt's all about enriching web applications' user interfaces with features that have already beenintegrated into desktop applications. See a nice autocomplete example that implements this featureat http://demo.script.aculo.us/ajax/autocompleter.The most popular example of this feature is Google Suggest.Google SuggestWhy Google Suggest? Because it is the most popular web implementation of suggest andautocomplete using AJAX. Believe it or not, Google was not the first to implement thistechnology. Christian Stocker used it in his Bitflux Blog http://blog.bitflux.ch/archive/2004/07/13/livesearch_roundup.html in April 2004, seven months prior to Google's release.One article that describes exactly how autocomplete textboxes can be implemented in a web pageusing JavaScript goes as back as September 2003, http://www.sitepoint.com/article/lifeautocomplete-textboxes.XMLHttpRequest is known to have been in use for a couple of yearsnow. Therefore, Google didn't invent anything; it just put together a perfect example.The web address where Google Suggest can be accessed is http://www.google.com/webhp?complete=1&hl=enFigure 6.1: Google Suggest in Beta166
Chapter 6The clever part of the JavaScript script in an application like Google Suggest is that it caches atable of previous suggestions received for a certain keyword. Therefore, if you type a keyword andthen erase back a few characters, the old suggestions received from the request will have beencached and hence there will be no need to fetch them again.The same technique has also been implemented in Gmail (www.gmail.com) and Google Maps(http://maps.google.com). .Implementing AJAX Suggest and AutocompleteIn this chapter we'll develop a suggest and autocomplete feature that helps the user to find PHPfunctions and their official help page from http://www.php.net. The PHP functions databaserequired for this chapter includes all the PHP functions from http://www.php.net/quickref.php.We will implement the following features in our application:• The matching functions are retrieved as you type and displayed in a scrollable dropdownlist.• The current keyword is autocompleted with the missing letters from the firstsuggestion returned as result. The added letters are highlighted.• The initial letters matching the search keyword are bolded in the drop-down list.• The drop-down list is scrollable, but the scroll bar appears only if the list of resultsexceeds a predefined number of suggestions.Figure 6.2: Many Interesting Functions167
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AJAX and PHPBuilding Responsive Web
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CreditsAuthorsCristian DarieBrinzar
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Filip Cherecheş-Toşa is a web dev
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Table of ContentsPreface 1Chapter 1
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Table of ContentsPreparing Your *ni
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PrefaceWhat This Book CoversChapter
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PrefaceAny command-line input and o
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O}EN PORTADAEl aborto...más allá
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Chapter 1Because end-user satisfact
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Chapter 1Three points for you to ke
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Chapter 1With JavaScript, developer
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interrupting the user from his or h
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• Creating simple online chat sol
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Chapter 1done typing. (This method
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Chapter 1All exercises from this bo
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etrieve the user name$name = $_GET[
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Chapter 1If you're curious to test
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AJAX and the Future of Web Applicat
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Client-Side Techniques with Smarter
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Chapter 2font-size: 10pt;}.TableCon
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Chapter 2Creating the XMLHttpReques
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Chapter 2You could, for example, ch
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You will learn the most interesting
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Chapter 2The safer version of proce
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Chapter 24. Create a file called as
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Chapter 2Figure 2.6: The Four HTTP
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Chapter 2}}else{// display status m
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Chapter 2}{// try to create XMLHttp
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Chapter 2The responseXML method of
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Chapter 2Figure 2.10: Opera Display
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I admit that the following piece of
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3Server-Side Techniqueswith PHP and
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Chapter 3}for (var i=0; i
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Chapter 3// create the element$boo
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Chapter 3// create the root elemen
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Chapter 3// read a file from the se
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Chapter 3Figure 3.3: PHP Parameters
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Chapter 3Without the customized err
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}}// display the error in case of f
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Chapter 3Figure 3.7: Connecting to
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Chapter 3}}// continue only if HTTP
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Chapter 3You can make Firefox liste
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Chapter 3}"MSXML2.XMLHTTP.4.0","MSX
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'TEXT: ' . $errStr . chr(10) .'LOCA
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etrieve the parameters$num = 1; //
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Chapter 3Figure 3.16: Flowchart Des
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}Chapter 3// only continue if xmlHt
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}throw(response.length == 0 ? "Serv
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function process(){// ...if (reques
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Chapter 3Working with MySQLA back-e
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Chapter 3Figure 3.17: Executing SQL
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Chapter 3SELECT user_id, user_name
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3. In your foundations folder, crea
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Chapter 3After these commands execu
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Chapter 3• friendly.php is a PHP
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This example requires a JavaScript-
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Page 127 and 128: Chapter 3}// create HTML-formatted
Page 129: Chapter 3On the server side, all th
Page 132 and 133: AJAX Form ValidationThe code in thi
Page 134 and 135: AJAX Form ValidationFigure 4.2: The
Page 136 and 137: AJAX Form ValidationNote that deali
Page 138 and 139: AJAX Form Validation"3" => "March",
Page 140 and 141: AJAX Form Validationclass="">Please
Page 142 and 143: AJAX Form Validation}}alert("Error
Page 144 and 145: AJAX Form Validation// output the e
Page 146 and 147: AJAX Form Validationbreak;}}// Chec
Page 148 and 149: AJAX Form Validationprivate functio
Page 150 and 151: AJAX Form ValidationThe onblur even
Page 152 and 153: AJAX Form ValidationAfter this basi
Page 154 and 155: AJAX Form ValidationSummaryWhile we
Page 156 and 157: AJAX ChatFigure 5.1: MeeboMeebo off
Page 158 and 159: AJAX ChatThe messages for the AJAX
Page 160 and 161: AJAX Chat// destructor closes datab
Page 162 and 163: AJAX Chat}}?>8. Create another file
Page 164 and 165: AJAX Chat/* creates an XMLHttpReque
Page 166 and 167: AJAX Chat}}xmlHttpGetMessages.send(
Page 168 and 169: AJAX Chatfunction handleKey(e){// g
Page 170 and 171: AJAX Chat12. After having talked ab
Page 172 and 173: AJAX ChatOn pressing the Send butto
Page 174 and 175: AJAX ChatSummaryAt the beginning of
Page 178 and 179: AJAX Suggest and AutocompleteTime f
Page 180 and 181: AJAX Suggest and Autocomplete170'FR
Page 182 and 183: AJAX Suggest and Autocomplete10. Cr
Page 184 and 185: AJAX Suggest and Autocomplete}if(ca
Page 186 and 187: AJAX Suggest and Autocomplete}if(re
Page 188 and 189: AJAX Suggest and Autocomplete}var k
Page 190 and 191: AJAX Suggest and AutocompletecrtLin
Page 192 and 193: AJAX Suggest and AutocompleteFigure
Page 194 and 195: AJAX Suggest and Autocompletewant c
Page 196 and 197: AJAX Suggest and AutocompleteNext,
Page 198 and 199: AJAX Suggest and Autocompletein sug
Page 200 and 201: AJAX Real-Time Charting with SVGFor
Page 202 and 203: AJAX Real-Time Charting with SVG0.0
Page 204 and 205: AJAX Real-Time Charting with SVG3.
Page 206 and 207: AJAX Real-Time Charting with SVG//
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Page 210 and 211: AJAX Real-Time Charting with SVGcoo
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Page 214 and 215: AJAX GridImplementing the AJAX Grid
Page 216 and 217: AJAX GridCREATE TABLE product(produ
Page 218 and 219: AJAX Grid}// execute the queryif ($
Page 220 and 221: AJAX Grid// clear any output that h
Page 222 and 223: AJAX Grid212// the id of the grid d
Page 224 and 225: AJAX Grid// handle receiving the se
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AJAX Grid// handle receiving a resp
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AJAX GridAs usual on the server, we
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AJAX Grid220}{}stylesheetDoc = crea
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9AJAX RSS ReaderIn the last few yea
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Chapter 9Figure 9.1: Managing RSS S
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header('Pragma: no-cache');header('
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Chapter 9Loading feed...About the A
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Chapter 9}// continue if the proces
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Chapter 9}width: 410px;background-c
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And finally, we send the HTTP reque
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10AJAX Drag and DropWhen drag-and-d
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Chapter 10The Prototype features ar
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Chapter 10When dropping a task on t
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Chapter 10DROP HERE TO DELETE7. Cre
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header('Expires: Fri, 25 Dec 1980 0
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Chapter 10}}}else if (action =="del
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Chapter 1011. Load http://localhost
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details are saved using a cache sys
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Chapter 10SummaryThis is it! You've
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Preparing Your Working EnvironmentT
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Preparing Your Working EnvironmentA
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Preparing Your Working Environment1
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Preparing Your Working EnvironmentA
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Preparing Your Working Environment6
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IndexAabort() method, XMLHttpReques
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exception handling, JavaScript, 43
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PHP Parameters and Error Handlingre
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updateChart() function, realTimeCha
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AJAX and PHP

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