AJAX and PHP

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AJAX RSS Reader 4. The application will look like Figure 9.2: Figure 9.2: Our AJAX-enabled RSS Reader Start Page Feeds are loaded dynamically and are displayed as links in the left column. Clicking on a feed will trigger an HTTP request and the server script will acquire the desired RSS feed. The server then formats the feed with XSL and returns an XML string. Results are then displayed in a human-readable form. Time for Action—Building the RSS Reader Application 1. In your ajax folder, create a new folder named rss_reader. 2. Let's start with the server. Create a new file named rss_reader.php, and add this code to it:
header('Pragma: no-cache'); header('Content-Type: text/xml'); // return the news to the client echo $reader->getFormattedXML(); ?> 3. Create a new file named rss_reader.class.php, and add this code to it: mXml = simplexml_load_file(urldecode($szFeed)); // retrieve the XSL file contents in a SimpleXML object $this->mXsl = simplexml_load_file('rss_reader.xsl'); } Chapter 9 // Creates a formatted XML document based on retrieved feed public function getFormattedXML() { // create the XSLTProcessor object $proc = new XSLTProcessor; // attach the XSL $proc->importStyleSheet($this->mXsl); // apply the transformation and return formatted data as XML string return $proc->transformToXML($this->mXml); } } ?> 4. Create a new file named rss_reader.xsl, and add this code to it: read full article 5. Now add the standard error-handling file, error_handler.php. Feel free to copy this file from the previous chapter. Anyway, here's the code for it: 227 www.it-ebooks.info
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www.it-ebooks.info
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AJAX and PHP Building Responsive We
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About the Authors Cristian Darie is
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About the Reviewers Emilian Balanes
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Table of Contents Preface 1 Chapter
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Table of Contents Chapter 6: AJAX S
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Preface AJAX is a complex phenomeno
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Preface What You Need for This Book
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Preface Errata Although we have tak
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1 AJAX and the Future of Web Applic
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Chapter 1 Because end-user satisfac
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Chapter 1 Three points for you to k
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Chapter 1 With JavaScript, develope
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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 1 done typing. (This method
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Chapter 1 All exercises from this b
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etrieve the user name $name = $_GET
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Chapter 1 If you're curious to test
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Chapter 1 request. In our case, thi
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2 Client-Side Techniques with Smart
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AJAX Foundations: JavaScript and
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Chapter 2 • Because there is no s
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Time for Action—Using JavaScript
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Even More DOM In the previous exerc
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Chapter 2 What Just Happened? Well,
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Chapter 2 font-size: 10pt; } .Table
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Chapter 2 Creating the XMLHttpReque
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Chapter 2 You could, for example, c
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You will learn the most interesting
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Chapter 2 The safer version of proc
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Chapter 2 4. Create a file call
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Chapter 2 Figure 2.6: The Four HTTP
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Chapter 2 } } else { // display sta
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Chapter 2 } { // try to create XMLH
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Chapter 2 The responseXML method of
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Chapter 2 Figure 2.10: Opera Displa
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I admit that the following piece of
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3 Server-Side Techniques with PHP a
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Chapter 3 } for (var i=0; i
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Chapter 3 // create the element $b
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Chapter 3 // create the root eleme
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Chapter 3 // read a file from the s
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Chapter 3 Figure 3.3: PHP Parameter
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Chapter 3 Without the customized er
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} } // display the error in case of
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Chapter 3 Figure 3.7: Connecting to
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Chapter 3 } } // continue only if H
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Chapter 3 You can make Firefox list
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Chapter 3 } "MSXML2.XMLHTTP.4.0", "
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'TEXT: ' . $errStr . chr(10) . 'LOC
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etrieve the parameters $num = 1; //
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Chapter 3 Figure 3.16: Flowchart De
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} Chapter 3 // only continue if xml
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} throw(response.length == 0 ? "Ser
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function process() { // ... if (req
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Chapter 3 Working with MySQL A back
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Chapter 3 Figure 3.17: Executing SQ
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Chapter 3 SELECT user_id, user_name
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3. In your foundations folder, crea
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Chapter 3 After these commands exec
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Chapter 3 • friendly.php is a PHP
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This example requires a JavaSc
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} } // try to connect to the server
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Chapter 3 } // create HTML-formatte
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Chapter 3 On the server side, all t
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4 AJAX Form Validation Validating i
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Chapter 4 Always validate user inpu
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Chapter 4 Figure 4.4: Successful Su
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Chapter 4 .left { margin-left: 150p
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Chapter 4 value="" />
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Registration Successfull! <<
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Chapter 4 } } { // display error me
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Chapter 4 require_once ('config.php
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Chapter 4 } { } $_POST['txtBthDay']
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Chapter 4 } } ?> return ($value ==
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Chapter 4 The field ID and value re
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Chapter 4 If we are dealing with cl
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5 AJAX Chat We are living in a worl
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Chapter 5 Implementing AJAX Chat We
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Chapter 5 // default the last id to
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} Chapter 5 ' DATE_FORMAT(posted_on
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Chapter 5 AJAX Chat Your b
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* function called when the Send but
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} } // retrieve the arrays from the
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Chapter 5 } } } // call server asyn
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Chapter 5 If you analyze the code f
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The business logic behind chat.php
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6 AJAX Suggest and Autocomplete Sug
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Chapter 6 The clever part of the Ja
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Chapter 6 6. Create another file na
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Chapter 6 { } a { } font-weight: bo
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Chapter 6 } { // try to create XMLH
Page 187 and 188: Chapter 6 } } } } { } displayError(
Page 189 and 190: Chapter 6 div += "" + "" + crtFunct
Page 191 and 192: } } // select the new suggestion an
Page 193 and 194: Chapter 6 } } else // FF if (oText.
Page 195 and 196: Chapter 6 Figure 6.4: PHP Documenta
Page 197 and 198: Chapter 6 We have talked about cach
Page 199 and 200: Chapter 6 visible, we need to scrol
Page 201 and 202: 7 AJAX Real-Time Charting with SVG
Page 203 and 204: Chapter 7 Figure 7.1: SVG Chart The
Page 205 and 206: Chapter 7 Figure 7.2: SVG Charting
Page 207 and 208: Chapter 7 } { xmlHttp.onreadystatec
Page 209 and 210: } } // sets the X and Y attributes
Page 211 and 212: Chapter 7 } // Supported by Mozilla
Page 213 and 214: Chapter 7 • All HTTP requests go
Page 215 and 216: 8 AJAX Grid Data grids have always
Page 217 and 218: Chapter 8 Figure 8.2: AJAX Grid in
Page 219 and 220: $name = $_GET['name']; // update th
Page 221 and 222: } Chapter 8 if (!isset($_SESSION['r
Page 223 and 224: Chapter 8 # editId(, true) Edit
Page 225 and 226: Chapter 8 } // this should work for
Page 227 and 228: } Chapter 8 if(editableId) editId(e
Page 229 and 230: } color: darkblue; text-align: righ
Page 231 and 232: Chapter 8 On the client, this data
Page 233 and 234: Chapter 8 save() and undo() are hel
Page 235 and 236: 9 AJAX RSS Reader In the last few y
Page 237: Chapter 9 Figure 9.1: Managing RSS
Page 241 and 242: Chapter 9 Loading feed... Abou
Page 243 and 244: Chapter 9 } // continue if the proc
Page 245 and 246: Chapter 9 } width: 410px; backgroun
Page 247 and 248: And finally, we send the HTTP reque
Page 249 and 250: 10 AJAX Drag and Drop When drag-and
Page 251 and 252: Chapter 10 The Prototype features a
Page 253 and 254: Chapter 10 When dropping a task on
Page 255 and 256: Chapter 10 DROP HERE TO DELETE
Page 257 and 258: header('Expires: Fri, 25 Dec 1980 0
Page 259 and 260: Chapter 10 } } } else if (action ==
Page 261 and 262: Chapter 10 11. Load http://localhos
Page 263 and 264: details are saved using a cache sys
Page 265 and 266: Chapter 10 Summary This is it! You'
Page 267 and 268: A Preparing Your Working Environmen
Page 269 and 270: Appendix A During installation you'
Page 271 and 272: Before going through any case studi
Page 273 and 274: Appendix A Preparing Your *nix Play
Page 275 and 276: 8. Finally, point your web browser
Page 277 and 278: 2. Write ajax in the Create a new d
Page 279 and 280: Index A abort() method, XMLHttpRequ
Page 281 and 282: exception handling, JavaScript, 43
Page 283 and 284: PHP Parameters and Error Handling r
Page 285 and 286: updateChart() function, realTimeCha
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