problem with session.

[daniel36]

i have created a contact form in which captcha is inplemented.the captcha value is stored in session.i am storing value of session in a hidden input field due to ajax.but when i reload the page the session value in hidden field comes ,old value.here is my form-

<?php session_start(); ?>
<div class="form">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="form.js"></script>
<table>
<tr>
<td>Name*</td>
<td><input type="text" name="name" id="name"></td>
</tr>
<tr>
<td>E-Mail*</td>
<td><input type="text" name="email" id="email"></td>
</tr>
<tr>
<td>Company/Orgnisation Name*</td>
<td><input type="text" name="company" id="company"></td>
</tr>
<tr>
<td>Contact Number*</td>
<td><input type="text" name="contact" id="contact"></td>
</tr>
<tr>
<td>Country*</td>
<td><select name="country" id="country">
<option value="Aland Islands">Aland Islands</option>
<option value="Afghanistan">Afghanistan</option>
<option value="Albania">Albania</option>
<option value="Algeria">Algeria</option>
<option value="American Samoa">American Samoa</option>
<option value="Americas">Americas</option>
<option value="Andorra">Andorra</option>
<option value="Angola">Angola</option>
<option value="Anguilla">Anguilla</option>
<option value="Antarctica">Antarctica</option>
<option value="Antigua and Barbuda">Antigua and Barbuda</option>
<option value="Argentina">Argentina</option>
<option value="Armenia">Armenia</option>
<option value="Aruba">Aruba</option>
<option value="Asia">Asia</option>
<option value="Australia">Australia</option>
<option value="Australia and New Zealand">Australia and New Zealand</option>
<option value="Austria">Austria</option>
<option value="Azerbaijan">Azerbaijan</option>
<option value="Bahamas">Bahamas</option>
<option value="Bahrain">Bahrain</option>
<option value="Bangladesh">Bangladesh</option>
<option value="Barbados">Barbados</option>
<option value="Belarus">Belarus</option>
<option value="Belgium">Belgium</option>
<option value="Belize">Belize</option>
<option value="Benin">Benin</option>
<option value="Bermuda">Bermuda</option>
<option value="Bhutan">Bhutan</option>
<option value="Bolivia">Bolivia</option>
<option value="Bosnia and Herzegovina">Bosnia and Herzegovina</option>
<option value="Botswana">Botswana</option>
<option value="Bouvet Island">Bouvet Island</option>
<option value="Brazil">Brazil</option>
<option value="British Indian Ocean Territory">British Indian Ocean Territory</option>
<option value="British Virgin Islands">British Virgin Islands</option>
<option value="Brunei">Brunei</option>
<option value="Bulgaria">Bulgaria</option>
<option value="Burkina Faso">Burkina Faso</option>
<option value="Burundi">Burundi</option>
<option value="Cote dIvoire">Cote dIvoire</option>
<option value="Cambodia">Cambodia</option>
<option value="Cameroon">Cameroon</option>
<option value="Canada">Canada</option>
<option value="Cape Verde">Cape Verde</option>
<option value="Caribbean">Caribbean</option>
<option value="Cayman Islands">Cayman Islands</option>
<option value="Central African Republic">Central African Republic</option>
<option value="Central America">Central America</option>
<option value="Central Asia">Central Asia</option>
<option value="Chad">Chad</option>
<option value="Channel-Islands">Channel-Islands</option>
<option value="Chile">Chile</option>
<option value="China">China</option>
<option value="Christmas Island">Christmas Island</option>
<option value="Cocos Keeling Islands">Cocos Keeling Islands</option>
<option value="Colombia">Colombia</option>
<option value="Commonwealth of Independent States">Commonwealth of Independent States</option>
<option value="Comoros">Comoros</option>
<option value="Congo - Brazzaville">Congo - Brazzaville</option>
<option value="Congo - Kinshasa">Congo - Kinshasa</option>
<option value="Cook Islands">Cook Islands</option>
<option value="Costa Rica">Costa Rica</option>
<option value="Croatia">Croatia</option>
<option value="Cuba">Cuba</option>
<option value="Cyprus">Cyprus</option>
<option value="Czech Republic">Czech Republic</option>
<option value="Czechoslovakia">Czechoslovakia</option>
<option value="Denmark">Denmark</option>
<option value="Djibouti">Djibouti</option>
<option value="Dominica">Dominica</option>
<option value="Dominican Republic">Dominican Republic</option>
<option value="Eastern Africa">Eastern Africa</option>
<option value="Eastern Asia">Eastern Asia</option>
<option value="Eastern Europe">Eastern Europe</option>
<option value="Ecuador">Ecuador</option>
<option value="Egypt">Egypt</option>
<option value="El Salvador">El Salvador</option>
<option value="Equatorial Guinea">Equatorial Guinea</option>
<option value="Eritrea">Eritrea</option>
<option value="Estonia">Estonia</option>
<option value="Ethiopia">Ethiopia</option>
<option value="Europe">Europe</option>
<option value="European Union">European Union</option>
<option value="Falkland Islands">Falkland Islands</option>
<option value="Faroe Islands">Faroe Islands</option>
<option value="Fiji">Fiji</option>
<option value="Finland">Finland</option>
<option value="France">France</option>
<option value="French Guiana">French Guiana</option>
<option value="French Polynesia">French Polynesia</option>
<option value="French Southern Territories">French Southern Territories</option>
<option value="Gabon">Gabon</option>
<option value="Gambia">Gambia</option>
<option value="Georgia">Georgia</option>
<option value="Germany">Germany</option>
<option value="Ghana">Ghana</option>
<option value="Gibraltar">Gibraltar</option>
<option value="Greece">Greece</option>
<option value="Greenland">Greenland</option>
<option value="Grenada">Grenada</option>
<option value="Guadeloupe">Guadeloupe</option>
<option value="Guam">Guam</option>
<option value="Guatemala">Guatemala</option>
<option value="Guernsey">Guernsey</option>
<option value="Guinea">Guinea</option>
<option value="Guinea-Bissau">Guinea-Bissau</option>
<option value="Guyana">Guyana</option>
<option value="Haiti">Haiti</option>
<option value="Heard Island and McDonald Islands">Heard Island and McDonald Islands</option>
<option value="Honduras">Honduras</option>
<option value="Hong Kong SAR China">Hong Kong SAR China</option>
<option value="Hungary">Hungary</option>
<option value="Iceland">Iceland</option>
<option value="India">India</option>
<option value="Indonesia">Indonesia</option>
<option value="Iran">Iran</option>
<option value="Iraq">Iraq</option>
<option value="Ireland">Ireland</option>
<option value="Isle of Man">Isle of Man</option>
<option value="Israel">Israel</option>
<option value="Italy">Italy</option>
<option value="Jamaica">Jamaica</option>
<option value="Japan">Japan</option>
<option value="Jersey">Jersey</option>
<option value="Jordan">Jordan</option>
<option value="Kazakhstan">Kazakhstan</option>
<option value="Kenya">Kenya</option>
<option value="Kiribati">Kiribati</option>
<option value="Kuwait">Kuwait</option>
<option value="Kyrgyzstan">Kyrgyzstan</option>
<option value="Laos">Laos</option>
<option value="Latin America and the Caribbean">Latin America and the Caribbean</option>
<option value="Latvia">Latvia</option>
<option value="Lebanon">Lebanon</option>
<option value="Lesotho">Lesotho</option>
<option value="Liberia">Liberia</option>
<option value="Libya">Libya</option>
<option value="Liechtenstein">Liechtenstein</option>
<option value="Lithuania">Lithuania</option>
<option value="Luxembourg">Luxembourg</option>
<option value="Macau SAR China">Macau SAR China</option>
<option value="Macedonia">Macedonia</option>
<option value="Madagascar">Madagascar</option>
<option value="Malawi">Malawi</option>
<option value="Malaysia">Malaysia</option>
<option value="Maldives">Maldives</option>
<option value="Mali">Mali</option>
<option value="Malta">Malta</option>
<option value="Marshall Islands">Marshall Islands</option>
<option value="Martinique">Martinique</option>
<option value="Mauritania">Mauritania</option>
<option value="Mauritius">Mauritius</option>
<option value="Mayotte">Mayotte</option>
<option value="Melanesia">Melanesia</option>
<option value="Mexico">Mexico</option>
<option value="Micronesia">Micronesia</option>
<option value="Micronesian Region">Micronesian Region</option>
<option value="Middle Africa">Middle Africa</option>
<option value="Moldova">Moldova</option>
<option value="Monaco">Monaco</option>
<option value="Mongolia">Mongolia</option>
<option value="Montenegro">Montenegro</option>
<option value="Montserrat">Montserrat</option>
<option value="Morocco">Morocco</option>
<option value="Mozambique">Mozambique</option>
<option value="Myanmar Burma">Myanmar Burma</option>
<option value="Namibia">Namibia</option>
<option value="Nauru">Nauru</option>
<option value="Nepal">Nepal</option>
<option value="Netherlands">Netherlands</option>
<option value="Netherlands Antilles">Netherlands Antilles</option>
<option value="New Caledonia">New Caledonia</option>
<option value="New Zealand">New Zealand</option>
<option value="Nicaragua">Nicaragua</option>
<option value="Niger">Niger</option>
<option value="Nigeria">Nigeria</option>
<option value="Niue">Niue</option>
<option value="Norfolk Island">Norfolk Island</option>
<option value="North Korea">North Korea</option>
<option value="Northern Africa">Northern Africa</option>
<option value="Northern America">Northern America</option>
<option value="Northern Europe">Northern Europe</option>
<option value="Northern Mariana Islands">Northern Mariana Islands</option>
<option value="Norway">Norway</option>
<option value="Oceania">Oceania</option>
<option value="Oman">Oman</option>
<option value="Outlying Oceania">Outlying Oceania</option>
<option value="Pakistan">Pakistan</option>
<option value="Palau">Palau</option>
<option value="Palestinian Territories">Palestinian Territories</option>
<option value="Panama">Panama</option>
<option value="Papua New Guinea">Papua New Guinea</option>
<option value="Paraguay">Paraguay</option>
<option value="Peru">Peru</option>
<option value="Philippines">Philippines</option>
<option value="Pitcairn Islands">Pitcairn Islands</option>
<option value="Poland">Poland</option>
<option value="Polynesia">Polynesia</option>
<option value="Portugal">Portugal</option>
<option value="Puerto Rico">Puerto Rico</option>
<option value="Qatar">Qatar</option>
<option value="Reunion">Reunion</option>
<option value="Romania">Romania</option>
<option value="Russia">Russia</option>
<option value="Rwanda">Rwanda</option>
<option value="Sao Tome and Principe">Sao Tome and Principe</option>
<option value="Saint Barthelemy">Saint Barthelemy</option>
<option value="Saint Helena">Saint Helena</option>
<option value="Saint Kitts and Nevis">Saint Kitts and Nevis</option>
<option value="Saint Lucia">Saint Lucia</option>
<option value="Saint Martin">Saint Martin</option>
<option value="Saint Pierre and Miquelon">Saint Pierre and Miquelon</option>
<option value="Saint Vincent and the Grenadines">Saint Vincent and the Grenadines</option>
<option value="Samoa">Samoa</option>
<option value="San Marino">San Marino</option>
<option value="Saudi Arabia">Saudi Arabia</option>
<option value="Senegal">Senegal</option>
<option value="Serbia">Serbia</option>
<option value="Serbia and Montenegro">Serbia and Montenegro</option>
<option value="Seychelles">Seychelles</option>
<option value="Sierra Leone">Sierra Leone</option>
<option value="Singapore">Singapore</option>
<option value="SlovakiaSolomon Islands">SlovakiaSolomon Islands</option>
<option value="Somalia">Somalia</option>
<option value="South-Central Asia">South-Central Asia</option>
<option value="South-Eastern Asia">South-Eastern Asia</option>
<option value="South Africa">South Africa</option>
<option value="South America">South America</option>
<option value="South Georgia and the South Sandwich Islands">South Georgia and the South Sandwich Islands</option>
<option value="South Korea">South Korea</option>
<option value="Southern Asia">Southern Asia</option>
<option value="Southern Europe">Southern Europe</option>
<option value="Spain">Spain</option>
<option value="Sri Lanka">Sri Lanka</option>
<option value="Sudan">Sudan</option>
<option value="Suriname">Suriname</option>
<option value="Svalbard and Jan Swaziland">Svalbard and Jan Swaziland</option>
<option value="Sweden">Sweden</option>
<option value="Switzerland">Switzerland</option>
<option value="Syria">Syria</option>
<option value="Taiwan">Taiwan</option>
<option value="Tajikistan">Tajikistan</option>
<option value="Tanzania">Tanzania</option>
<option value="Thailand">Thailand</option>
<option value="Timor-Leste">Timor-Leste</option>
<option value="Togo">Togo</option>
<option value="Tokelau">Tokelau</option>
<option value="Tonga">Tonga</option>
<option value="Trinidad and Tobago">Trinidad and Tobago</option>
<option value="Tunisia">Tunisia</option>
<option value="Turkey">Turkey</option>
<option value="Turkmenistan">Turkmenistan</option>
<option value="Turks and Caicos Islands">Turks and Caicos Islands</option>
<option value="Tuvalu">Tuvalu</option>
<option value="U.S. Minor Outlying Islands">U.S. Minor Outlying Islands</option>
<option value="U.S. Virgin Uganda">U.S. Virgin Uganda</option>
<option value="Ukraine">Ukraine</option>
<option value="nited Arab Emirates">nited Arab Emirates</option>
<option value="United Kingdom">United Kingdom</option>
<option value="United States">United States</option>
<option value="Unknown or Invalid Region">Unknown or Invalid Region</option>
<option value="Uruguay">Uruguay</option>
<option value="Uzbekistan">Uzbekistan</option>
<option value="Vanuatu">Vanuatu</option>
<option value="Vatican City">Vatican City</option>
<option value="Venezuela">Venezuela</option>
<option value="Vietnam">Vietnam</option>
<option value="Wallis and Futuna">Wallis and Futuna</option>
<option value="Western Africa">Western Africa</option>
<option value="Western Asia">Western Asia</option>
<option value="Western Europe">Western Europe</option>
<option value="Western Sahara">Western Sahara</option>
<option value="Yemen">Yemen</option>
<option value="Zambia">Zambia</option>
<option value="Zimbabwe">Zimbabwe</option>
</select></td>
</tr>
<tr>
<td>Type of Query*</td>
<td><select name="menu" id="menu">
<option value="Web Solutions">Web Solutions</option>
<option value="Mobile Solutions">Mobile Solutions</option>
<option value="e-Commerce Solutions">e-Commerce Solutions</option>
<option value="Solutions for Education">Solutions for Education</option>
<option value="Solutions for Finance">Solutions for Finance</option>
<option value="Media / Press">Media / Press</option>
<option value="Careers">Careers</option>
<option value="CEO's Office">CEO's Office</option>
<option value="Feedback on Website">Feedback on Website</option>
<option value="Others">Others</option>
</select></td>
</tr>
<tr>
<td>Message*</td>
<td><textarea type="text" name="message" id="message"></textarea></td>
</tr>
<tr>
<td>Verification Code*</td>
<td><img src="captcha.php"></td>
</tr>
<tr>
<td>&nbsp; &nbsp; </td>
<td>
<input type="text" name="captcha" id="captcha"><input type="hidden" id="captcha_session" value="<?php echo $_SESSION['cap_code']; ?>"></td>
</tr>
<tr><td></td><td><input type="button" value="send" id="send"></td></tr>
</table> 
</div>

[pritaeas]

Your session value is never changed in this part of the code. Is there more?

[daniel36]

yes it is my captcha.php-

<?php
session_start();
$ranStr = md5(microtime());
$ranStr = substr($ranStr, 0, 6);
$_SESSION['cap_code'] = $ranStr;
$newImage = imagecreatefromjpeg("cap_bg.jpg");
$txtColor = imagecolorallocate($newImage, 0, 0, 0);
imagestring($newImage, 5, 5, 5, $ranStr, $txtColor);
header("Content-type: image/jpeg");
imagejpeg($newImage);
?> 

[pritaeas]

Oh. You use the PHP script to get an image AND overwrite the session value. That happens AFTER the original session value is outputted to the HTML (to the browser). You need a second AJAX call, after the image retrieval to update the hidden input I think.

[Webville312]

I think it would be a good idea to start the session first before using it in your captcha ....