AJAX and PHP

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AJAX Form Validation break; } } // Check if "I have read the terms" checkbox has been checked case 'chkReadTerms': return $this->validateReadTerms($inputValue); break; // validates all form fields on form submit public function ValidatePHP() { // error flag, becomes 1 when errors are found. $errorsExist = 0; // clears the errors session flag if (isset($_SESSION['errors'])) unset($_SESSION['errors']); // By default all fields are considered valid $_SESSION['errors']['txtUsername'] = 'hidden'; $_SESSION['errors']['txtName'] = 'hidden'; $_SESSION['errors']['selGender'] = 'hidden'; $_SESSION['errors']['selBthMonth'] = 'hidden'; $_SESSION['errors']['txtBthDay'] = 'hidden'; $_SESSION['errors']['txtBthYear'] = 'hidden'; $_SESSION['errors']['txtEmail'] = 'hidden'; $_SESSION['errors']['txtPhone'] = 'hidden'; $_SESSION['errors']['chkReadTerms'] = 'hidden'; // Validate username if (!$this->validateUserName($_POST['txtUsername'])) { $_SESSION['errors']['txtUsername'] = 'error'; $errorsExist = 1; } // Validate name if (!$this->validateName($_POST['txtName'])) { $_SESSION['errors']['txtName'] = 'error'; $errorsExist = 1; } // Validate gender if (!$this->validateGender($_POST['selGender'])) { $_SESSION['errors']['selGender'] = 'error'; } $errorsExist = 1; // Validate birth month if (!$this->validateBirthMonth($_POST['selBthMonth'])) { $_SESSION['errors']['selBthMonth'] = 'error'; $errorsExist = 1; } // Validate birth day if (!$this->validateBirthDay($_POST['txtBthDay'])) { $_SESSION['errors']['txtBthDay'] = 'error'; $errorsExist = 1; } // Validate birth year and date if (!$this->validateBirthYear($_POST['selBthMonth'] . '#' . 136 www.it-ebooks.info
Chapter 4 } { } $_POST['txtBthDay'] . '#' . $_POST['txtBthYear'])) $_SESSION['errors']['txtBthYear'] = 'error'; $errorsExist = 1; // Validate email if (!$this->validateEmail($_POST['txtEmail'])) { $_SESSION['errors']['txtEmail'] = 'error'; $errorsExist = 1; } // Validate phone if (!$this->validatePhone($_POST['txtPhone'])) { $_SESSION['errors']['txtPhone'] = 'error'; $errorsExist = 1; } // Validate read terms if (!isset($_POST['chkReadTerms']) || !$this->validateReadTerms($_POST['chkReadTerms'])) { $_SESSION['errors']['chkReadTerms'] = 'error'; $_SESSION['values']['chkReadTerms'] = ''; $errorsExist = 1; } // If no errors are found, point to a successful validation page if ($errorsExist == 0) { return 'allok.php'; } else { // If errors are found, save current user input foreach ($_POST as $key => $value) { $_SESSION['values'][$key] = $_POST[$key]; } return 'index.php'; } // validate user name (must be empty, and must not be already registered) private function validateUserName($value) { // trim and escape input value $value = $this->mMysqli->real_escape_string(trim($value)); // empty user name is not valid if ($value == null) return 0; // not valid // check if the username exists in the database $query = $this->mMysqli->query('SELECT user_name FROM users ' . 'WHERE user_name="' . $value . '"'); if ($this->mMysqli->affected_rows > 0) return '0'; // not valid else return '1'; // valid } // validate name 137 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
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 $num = 1; //
Page 105 and 106: Chapter 3 Figure 3.16: Flowchart De
Page 107 and 108: } Chapter 3 // only continue if xml
Page 109 and 110: } throw(response.length == 0 ? "Ser
Page 111 and 112: function process() { // ... if (req
Page 113 and 114: Chapter 3 Working with MySQL A back
Page 115 and 116: Chapter 3 Figure 3.17: Executing SQ
Page 117 and 118: Chapter 3 SELECT user_id, user_name
Page 119 and 120: 3. In your foundations folder, crea
Page 121 and 122: Chapter 3 After these commands exec
Page 123 and 124: Chapter 3 • friendly.php is a PHP
Page 125 and 126: This example requires a JavaSc
Page 127 and 128: } } // try to connect to the server
Page 129 and 130: Chapter 3 } // create HTML-formatte
Page 131 and 132: Chapter 3 On the server side, all t
Page 133 and 134: 4 AJAX Form Validation Validating i
Page 135 and 136: Chapter 4 Always validate user inpu
Page 137 and 138: Chapter 4 Figure 4.4: Successful Su
Page 139 and 140: Chapter 4 .left { margin-left: 150p
Page 141 and 142: Chapter 4 value="" />
Page 143 and 144: Registration Successfull! <<
Page 145 and 146: Chapter 4 } } { // display error me
Page 147: Chapter 4 require_once ('config.php
Page 151 and 152: Chapter 4 } } ?> return ($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
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Chapter 6 visible, we need to scrol
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7 AJAX Real-Time Charting with SVG
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Chapter 7 Figure 7.1: SVG Chart The
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Chapter 7 Figure 7.2: SVG Charting
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Chapter 7 } { xmlHttp.onreadystatec
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} } // sets the X and Y attributes
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Chapter 7 } // Supported by Mozilla
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Chapter 7 • All HTTP requests go
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8 AJAX Grid Data grids have always
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Chapter 8 Figure 8.2: AJAX Grid in
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$name = $_GET['name']; // update th
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} Chapter 8 if (!isset($_SESSION['r
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Chapter 8 # editId(, true) Edit
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Chapter 8 } // this should work for
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} Chapter 8 if(editableId) editId(e
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} color: darkblue; text-align: righ
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Chapter 8 On the client, this data
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Chapter 8 save() and undo() are hel
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9 AJAX RSS Reader In the last few y
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Chapter 9 Figure 9.1: Managing RSS
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header('Pragma: no-cache'); header(
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Chapter 9 Loading feed... Abou
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Chapter 9 } // continue if the proc
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Chapter 9 } width: 410px; backgroun
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And finally, we send the HTTP reque
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10 AJAX Drag and Drop When drag-and
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Chapter 10 The Prototype features a
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Chapter 10 When dropping a task on
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Chapter 10 DROP HERE TO DELETE
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header('Expires: Fri, 25 Dec 1980 0
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Chapter 10 } } } else if (action ==
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Chapter 10 11. Load http://localhos
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details are saved using a cache sys
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Chapter 10 Summary This is it! You'
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A Preparing Your Working Environmen
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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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