Archive for May 21st, 2007

21 05 2007

Get remote ip address in PHP even when the user is behind a proxy

Posted by: Ori Pekelman in php

If you want to log what a user is doing, or have any other reason to get his ip using HTTP_CLIENT_IP to get the remote user IP is not at all enough, if the client is connecting through a proxy (for an example your site is configured behind an apache_mod_proxy) you should also test for HTTP_X_FORWARDED_FOR and fall back on REMOTE_ADDR or you might always be getting the proxie's IP.

PLAIN TEXT
PHP:
  1. function getIP() {
  2. $ip;
  3.  
  4. if (getenv("HTTP_CLIENT_IP")) $ip = getenv("HTTP_CLIENT_IP");
  5. else if(getenv("HTTP_X_FORWARDED_FOR")) $ip = getenv("HTTP_X_FORWARDED_FOR");
  6. else if(getenv("REMOTE_ADDR")) $ip = getenv("REMOTE_ADDR");
  7. else $ip = "UNKNOWN";
  8.  
  9. return $ip;
  10.  
  11. }

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21 05 2007

Make connected combo boxes to choose a time interval

Posted by: Ori Pekelman in javascript

Ever needed to select in a form a start and an end time (meeting, event etc..) this little bit of code will help you have a default interval (here 2 hours). When the first combo box changes the second one is set to two hours later.
As usual this javascript is unobtrusive and degradable, just call somewhere initHourCombos() to initialize it. Make sure you change the name $('start') and $('end') if your elements have a different id.

PLAIN TEXT
JAVASCRIPT:
  1. /* Make connected combo box 'End' jump 2 hours when combo 'Start' changes
  2. * (c) AF83 2007 Ori Pekelman
  3. * uses code found on http://www.irt.org/script/626.htm
  4. * uses the Prototype library for attaching the event to the combo (you can do without this.. just find the correct element)
  5.  
  6. <label for="start">From :</label>
  7. <select id="start" name="start" class="hour">
  8.   <option value="07:00">07:00</option>
  9.  
  10.   <option value="07:30">07:30</option>
  11.   <option value="08:00">08:00</option>
  12.   <option value="08:30">08:30</option>
  13.   <option value="09:00">09:00</option>
  14.   <option value="09:30">09:30</option>
  15.   <option value="10:00">10:00</option>
  16.  
  17.   <option value="10:30">10:30</option>
  18.   <option value="11:00">11:00</option>
  19.   <option value="11:30">11:30</option>
  20.   <option value="12:00" selected="selected">12:00</option>
  21.   <option value="12:30">12:30</option>
  22.   <option value="13:00">13:00</option>
  23.  
  24.   <option value="13:30">13:30</option>
  25.   <option value="14:00">14:00</option>
  26.   <option value="14:30">14:30</option>
  27.   <option value="15:00">15:00</option>
  28.   <option value="15:30">15:30</option>
  29.   <option value="16:00">16:00</option>
  30.  
  31.   <option value="16:30">16:30</option>
  32.   <option value="17:00">17:00</option>
  33.   <option value="17:30">17:30</option>
  34.   <option value="18:00">18:00</option>
  35.   <option value="18:30">18:30</option>
  36.   <option value="19:00">19:00</option>
  37.  
  38.   <option value="19:30">19:30</option>
  39.   <option value="20:00">20:00</option>
  40.   <option value="20:30">20:30</option>
  41.   <option value="21:00">21:00</option>
  42.   <option value="21:30">21:30</option>
  43.   <option value="22:00">22:00</option>
  44.  
  45.   <option value="22:30">22:30</option>
  46.   <option value="23:00">23:00</option>
  47.   <option value="23:30">23:30</option>
  48.   <option value="24:00">24:00</option>
  49.   <option value="24:30">24:30</option>
  50.   <option value="01:00">01:00</option>
  51.  
  52.   <option value="01:30">01:30</option>
  53.   <option value="02:00">02:00</option>
  54.   <option value="02:30">02:30</option>
  55.   <option value="03:00">03:00</option>
  56.   <option value="03:30">03:30</option>
  57.   <option value="04:00">04:00</option>
  58.  
  59.   <option value="04:30">04:30</option>
  60.   <option value="05:00">05:00</option>
  61.   <option value="05:30">05:30</option>
  62.   <option value="06:00">06:00</option>
  63.   <option value="06:30">06:30</option>
  64. </select>
  65. <label for="end" class="hour">to:</label>
  66. <select id="end" name="end" class="heure">
  67.   <option value="07:00">07:00</option>
  68.   <option value="07:30">07:30</option>
  69.   <option value="08:00">08:00</option>
  70.   <option value="08:30">08:30</option>
  71.  
  72.   <option value="09:00">09:00</option>
  73.   <option value="09:30">09:30</option>
  74.   <option value="10:00">10:00</option>
  75.   <option value="10:30">10:30</option>
  76.   <option value="11:00">11:00</option>
  77.   <option value="11:30">11:30</option>
  78.  
  79.   <option value="12:00">12:00</option>
  80.   <option value="12:30">12:30</option>
  81.   <option value="13:00">13:00</option>
  82.   <option value="13:30">13:30</option>
  83.   <option value="14:00" selected="selected">14:00</option>
  84.   <option value="14:30">14:30</option>
  85.  
  86.   <option value="15:00">15:00</option>
  87.   <option value="15:30">15:30</option>
  88.   <option value="16:00">16:00</option>
  89.   <option value="16:30">16:30</option>
  90.   <option value="17:00">17:00</option>
  91.   <option value="17:30">17:30</option>
  92.  
  93.   <option value="18:00">18:00</option>
  94.   <option value="18:30">18:30</option>
  95.   <option value="19:00">19:00</option>
  96.   <option value="19:30">19:30</option>
  97.   <option value="20:00">20:00</option>
  98.   <option value="20:30">20:30</option>
  99.  
  100.   <option value="21:00">21:00</option>
  101.   <option value="21:30">21:30</option>
  102.   <option value="22:00">22:00</option>
  103.   <option value="22:30">22:30</option>
  104.   <option value="23:00">23:00</option>
  105.   <option value="23:30">23:30</option>
  106.  
  107.   <option value="24:00">24:00</option>
  108.   <option value="24:30">24:30</option>
  109.   <option value="01:00">01:00</option>
  110.   <option value="01:30">01:30</option>
  111.   <option value="02:00">02:00</option>
  112.   <option value="02:30">02:30</option>
  113.  
  114.   <option value="03:00">03:00</option>
  115.   <option value="03:30">03:30</option>
  116.   <option value="04:00">04:00</option>
  117.   <option value="04:30">04:30</option>
  118.   <option value="05:00">05:00</option>
  119.   <option value="05:30">05:30</option>
  120.  
  121.   <option value="06:00">06:00</option>
  122.   <option value="06:30">06:30</option>
  123. </select>
  124.  
  125.  
  126. */
  127. function initHourCombos() {
  128. if ($('start')){
  129. $('start').addEventListener('change',function () {
  130.     $('end').value = addTime (this.value ,"02:00")
  131. },false)}}
  132.  
  133. function addTime(t1,t2){
  134. var m = (t1.substring(0,t1.indexOf(':'))-0) * 60 +
  135.         (t1.substring(t1.indexOf(':')+1,t1.length)-0) +
  136.         (t2.substring(0,t2.indexOf(':'))-0) * 60 +
  137.         (t2.substring(t2.indexOf(':')+1,t2.length)-0);
  138. var h = Math.floor(m / 60);
  139. m=(m - (h * 60));
  140. if (h>24) {h=h-24};
  141. if (m&lt;10) {m='0'+m};
  142. if (h&lt;10) {h='0'+h};
  143.  
  144. t3=(h + ':' + m );
  145.  
  146. return t3;
  147. }

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