StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POVariable was undefined when I get $q?
primarykey
Id
19086966
data
AcceptedAnswerId
0
AnswerCount
1
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2013-09-30T05:25:18.847
FavoriteCount
0
LastActivityDate
2013-09-30T07:29:01.020
LastEditDate
2013-09-30T06:10:54.350
LastEditorUserId
2786293
OwnerUserId
2786293
ParentId
0
PostTypeId
1
Score
0
ViewCount
171
LastEditorDisplayName
text
Body
<p>I working now with this code below, I want to display rfq list depends on rfq #. But when I choose, the $q was undefined.</p> <p>Dropdown.php</p> <pre><code> <?php $con = mysql_connect("localhost","root",""); $db = mysql_select_db("app",$con); $get=mysql_query("SELECT rfq FROM procurement GROUP BY rfq ORDER BY rfq"); $option = ''; while($rows = mysql_fetch_assoc($get)) { $option .= '<option value = "'.$rows['rfq'].'">'.$rows['rfq'].'</option>'; } ?> <form> <select name="users" onchange="showUser()"> <option value="ALL">ALL</option> <?php echo $option; ?> </select> </form> <br> <div id="txtHint"><b>Person info will be listed here.</b></div> getuser.php <?php include('connect.php'); $q=$_GET["q"]; $sql="SELECT rfq FROM procurement WHERE rfq='".$q."'"; $result = mysql_query($sql); echo "<table border='1'> <tr> <th>MOD</th> <th>RFQ #</th> </tr>"; while($row = mysql_fetch_array($result)) { echo "<tr>"; echo "<td>".$row['mode_of_procurement']."</td>"; echo "<td>".$row['rfq']."</td>"; echo "</tr>"; } echo "</table>"; echo $q; mysql_close(); ?> </code></pre> <p>But the value of $q didn't display, when I echo the $q the value is UNDEFINED. Why is that?</p> <p>And here's the script</p> <pre><code><script> function showUser(str) { if (str=="") { document.getElementById("txtHint").innerHTML=""; return; } if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("txtHint").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","getuser.php?q="+str,true); xmlhttp.send(); } </script> </code></pre> <p><img src="https://i.stack.imgur.com/eNMUk.jpg" alt="enter image description here"></p>
Tags
<javascript><php><jquery><mysql>
Title
Variable was undefined when I get $q?
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USdummy dummy
UserOwnerUserId
1. USdummy dummy
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. VO
  singulars
  PostPostId
  POVariable was undefined when I get $q?
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTApproveEditSuggestion
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.