AJAX and PHP

Recommendations

Info

AJAX Real-Time Charting with SVG • handleResults() is the callback method that is called by ajaxRequest when the response from the server is received. This response is read (again, with SVG implementation-specific code), and the coordinates generated by the server are sent to addPoint(). • addPoint() receives a set of coordinates used to generate a new node on the chart. These coordinates are saved for later, because on the next request they will be sent to the server. The server will use these coordinates to calculate the new ones for the client, enabling the simple mechanism of managing state: with each new request the X coordinate is increased by one and the Y is calculated randomly, but with a function that takes into account the previously generated Y coordinate. Summary Whether you like SVG or not (especially in the light of the recent SVG versus Flash wars), you must admit it allows implementing powerful functionality in web pages. Having tasted its functionality, you'll now know in which projects you might consider using it. If you are serious about SVG, be sure to check out the visual editors around, which make SVG creation a lot easier. You may also consider purchasing one of the numerous SVG books. 202 www.it-ebooks.info
8 AJAX Grid Data grids have always been one of the areas where web applications have had a serious disadvantage compared to desktop programs. The fact that the page needed a full reload when switching between grid pages, or when updating grid details, harmed the application from a usability point of view. Technically, fully reloading the page has bad effects as well, unnecessarily wasting network resources. But now you know there is a smarter solution to this problem. You can use AJAX to update the grid content without refreshing the page. You can keep your beautiful design in the client browser without even one page blink. Only the table data is refreshed, not the whole page. The novelty in this chapter is that we'll use Extensible Stylesheet Language Transformation (XSLT) T and XML Path Language (XPath) to generate the client output. XSLT and XPath are part of the Extensible Stylesheet Language (XSL) family. XSLT allows defining rules to transform an XML document to another format and XPath is a very powerful query language that allows performing searches and retrieving data from XML documents. When used to create web front ends, XSLT permits implementing a very flexible architecture, in which the server outputs the data in XML format, and that data is transformed to HTML using an XSL transformation. You can find an introduction to XSL in Appendix C at http://ajaxphp.packtpub.com, and a good description at http://en.wikipedia.org/wiki/Extensible_Stylesheet_Language. Note the XSL transformation can be applied at both client side and server side. The implementation in this chapter relies on client functionality to perform the transformation. This doesn't require any special features of the server, but it poses some constraints for the client. In Chapter 9, you will see how to apply the transformation at the server side using PHP functionality, in which case you require this feature to be enabled in PHP, but the solution works with any client, as the client receives directly the HTML code it is supposed to display. In this chapter, you'll use: • XSL to generate an HTML data grid based on XML data received from the server. • AJAX to implement the editable data grid. The user should be able to switch between product pages and edit product details without experiencing any page reloads. www.it-ebooks.info
Page 1 and 2:
www.it-ebooks.info
Page 3 and 4:
AJAX and PHP Building Responsive We
Page 5 and 6:
About the Authors Cristian Darie is
Page 7 and 8:
About the Reviewers Emilian Balanes
Page 9 and 10:
Table of Contents Preface 1 Chapter
Page 11 and 12:
Table of Contents Chapter 6: AJAX S
Page 13 and 14:
Preface AJAX is a complex phenomeno
Page 15 and 16:
Preface What You Need for This Book
Page 17 and 18:
Preface Errata Although we have tak
Page 19 and 20:
1 AJAX and the Future of Web Applic
Page 21 and 22:
Chapter 1 Because end-user satisfac
Page 23 and 24:
Chapter 1 Three points for you to k
Page 25 and 26:
Chapter 1 With JavaScript, develope
Page 27 and 28:
interrupting the user from his or h
Page 29 and 30:
• Creating simple online chat sol
Page 31 and 32:
Chapter 1 done typing. (This method
Page 33 and 34:
Chapter 1 All exercises from this b
Page 35 and 36:
etrieve the user name $name = $_GET
Page 37 and 38:
Chapter 1 If you're curious to test
Page 39 and 40:
Chapter 1 request. In our case, thi
Page 41 and 42:
2 Client-Side Techniques with Smart
Page 43 and 44:
AJAX Foundations: JavaScript and
Page 45 and 46:
Chapter 2 • Because there is no s
Page 47 and 48:
Time for Action—Using JavaScript
Page 49 and 50:
Even More DOM In the previous exerc
Page 51 and 52:
Chapter 2 What Just Happened? Well,
Page 53 and 54:
Chapter 2 font-size: 10pt; } .Table
Page 55 and 56:
Chapter 2 Creating the XMLHttpReque
Page 57 and 58:
Chapter 2 You could, for example, c
Page 59 and 60:
You will learn the most interesting
Page 61 and 62:
Chapter 2 The safer version of proc
Page 63 and 64:
Chapter 2 4. Create a file call
Page 65 and 66:
Chapter 2 Figure 2.6: The Four HTTP
Page 67 and 68:
Chapter 2 } } else { // display sta
Page 69 and 70:
Chapter 2 } { // try to create XMLH
Page 71 and 72:
Chapter 2 The responseXML method of
Page 73 and 74:
Chapter 2 Figure 2.10: Opera Displa
Page 75 and 76:
I admit that the following piece of
Page 77 and 78:
3 Server-Side Techniques with PHP a
Page 79 and 80:
Chapter 3 } for (var i=0; i
Page 81 and 82:
Chapter 3 // create the element $b
Page 83 and 84:
Chapter 3 // create the root eleme
Page 85 and 86:
Chapter 3 // read a file from the s
Page 87 and 88:
Chapter 3 Figure 3.3: PHP Parameter
Page 89 and 90:
Chapter 3 Without the customized er
Page 91 and 92:
} } // display the error in case of
Page 93 and 94:
Chapter 3 Figure 3.7: Connecting to
Page 95 and 96:
Chapter 3 } } // continue only if H
Page 97 and 98:
Chapter 3 You can make Firefox list
Page 99 and 100:
Chapter 3 } "MSXML2.XMLHTTP.4.0", "
Page 101 and 102:
'TEXT: ' . $errStr . chr(10) . 'LOC
Page 103 and 104:
etrieve the parameters $num = 1; //
Page 105 and 106:
Chapter 3 Figure 3.16: Flowchart De
Page 107 and 108:
} Chapter 3 // only continue if xml
Page 109 and 110:
} throw(response.length == 0 ? "Ser
Page 111 and 112:
function process() { // ... if (req
Page 113 and 114:
Chapter 3 Working with MySQL A back
Page 115 and 116:
Chapter 3 Figure 3.17: Executing SQ
Page 117 and 118:
Chapter 3 SELECT user_id, user_name
Page 119 and 120:
3. In your foundations folder, crea
Page 121 and 122:
Chapter 3 After these commands exec
Page 123 and 124:
Chapter 3 • friendly.php is a PHP
Page 125 and 126:
This example requires a JavaSc
Page 127 and 128:
} } // try to connect to the server
Page 129 and 130:
Chapter 3 } // create HTML-formatte
Page 131 and 132:
Chapter 3 On the server side, all t
Page 133 and 134:
4 AJAX Form Validation Validating i
Page 135 and 136:
Chapter 4 Always validate user inpu
Page 137 and 138:
Chapter 4 Figure 4.4: Successful Su
Page 139 and 140:
Chapter 4 .left { margin-left: 150p
Page 141 and 142:
Chapter 4 value="" />
Page 143 and 144:
Registration Successfull! <<
Page 145 and 146:
Chapter 4 } } { // display error me
Page 147 and 148:
Chapter 4 require_once ('config.php
Page 149 and 150:
Chapter 4 } { } $_POST['txtBthDay']
Page 151 and 152:
Chapter 4 } } ?> return ($value ==
Page 153 and 154:
Chapter 4 The field ID and value re
Page 155 and 156:
Chapter 4 If we are dealing with cl
Page 157 and 158:
5 AJAX Chat We are living in a worl
Page 159 and 160:
Chapter 5 Implementing AJAX Chat We
Page 161 and 162:
Chapter 5 // default the last id to
Page 163 and 164: } Chapter 5 ' DATE_FORMAT(posted_on
Page 165 and 166: Chapter 5 AJAX Chat Your b
Page 167 and 168: * 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: Chapter 7 • All HTTP requests go
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 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'
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
show all

AJAX and PHP

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?