AJAX and PHP

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AJAX Grid } // execute the query if ($result = $this->mMysqli->query($queryString)) { // fetch associative array while ($row = $result->fetch_assoc()) { // build the XML structure containing products $this->grid .= ''; foreach($row as $name=>$val) $this->grid .= '' . htmlentities($val) . ''; $this->grid .= ''; } // close the results stream $result->close(); } // update a product public function updateRecord($id, $on_promotion, $price, $name) { // escape input data for safely using it in SQL statements $id = $this->mMysqli->real_escape_string($id); $on_promotion = $this->mMysqli->real_escape_string($on_promotion); $price = $this->mMysqli->real_escape_string($price); $name = $this->mMysqli->real_escape_string($name); // build the SQL query that updates a product record $queryString = 'UPDATE product SET name="' . $name . '", ' . 'price=' . $price . ',' . 'on_promotion=' . $on_promotion . ' WHERE product_id=' . $id; // execute the SQL command $this->mMysqli->query($queryString); } // returns data about the current request (number of grid pages, etc) public function getParamsXML() { // calculate the previous page number $previous_page = ($this->mReturnedPage == 1) ? '' : $this->mReturnedPage-1; // calculate the next page number $next_page = ($this->mTotalPages == $this->mReturnedPage) ? '' : $this->mReturnedPage + 1; // return the parameters return '' . '' . $this->mReturnedPage . ''. '' . $this->mTotalPages . ''. '' . $this->mItemsCount . ''. '' . $previous_page . ''. '' . $next_page . '' . ''; } // returns the current grid page in XML format public function getGridXML() { return '' . $this->grid . ''; } // returns the total number of records for the grid private function countAllRecords() { /* if the record count isn't already cached in the session, read the value from the database */ 208 www.it-ebooks.info
} Chapter 8 if (!isset($_SESSION['record_count'])) { // the query that returns the record count $count_query = 'SELECT COUNT(*) FROM product'; // execute the query and fetch the result if ($result = $this->mMysqli->query($count_query)) { // retrieve the first returned row $row = $result->fetch_row(); /* retrieve the first column of the first row (it represents the records count that we were looking for), and save its value in the session */ $_SESSION['record_count'] = $row[0]; // close the database handle $result->close(); } } // read the record count from the session and return it return $_SESSION['record_count']; // receives a SELECT query that returns all products and modifies it // to return only a page of products private function createSubpageQuery($queryString, $pageNo) { // if we have few products then we don't implement pagination if ($this->mItemsCount mTotalPages = 1; } // else we calculate number of pages and build new SELECT query else { $this->mTotalPages = ceil($this->mItemsCount / ROWS_PER_VIEW); $start_page = ($pageNo - 1) * ROWS_PER_VIEW; $queryString .= ' LIMIT ' . $start_page . ',' . ROWS_PER_VIEW; } // save the number of the returned page $this->mReturnedPage = $pageNo; // returns the new query string return $queryString; } // end class Grid } ?> 5. Add the configuration file, config.php: 6. Create the error-handling script, error_handler.php with the following contents:
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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
Page 169 and 170: } } // retrieve the arrays from the
Page 171 and 172: Chapter 5 } } } // call server asyn
Page 173 and 174: Chapter 5 If you analyze the code f
Page 175 and 176: The business logic behind chat.php
Page 177 and 178: 6 AJAX Suggest and Autocomplete Sug
Page 179 and 180: Chapter 6 The clever part of the Ja
Page 181 and 182: Chapter 6 6. Create another file na
Page 183 and 184: Chapter 6 { } a { } font-weight: bo
Page 185 and 186: 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: $name = $_GET['name']; // update th
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 and 238: Chapter 9 Figure 9.1: Managing RSS
Page 239 and 240: header('Pragma: no-cache'); header(
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'
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Before going through any case studi
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Appendix A Preparing Your *nix Play
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8. Finally, point your web browser
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2. Write ajax in the Create a new d
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Index A abort() method, XMLHttpRequ
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exception handling, JavaScript, 43
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PHP Parameters and Error Handling r
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updateChart() function, realTimeCha
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AJAX and PHP

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