StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POPHP variable returns a null value
primarykey
Id
15626658
data
AcceptedAnswerId
0
AnswerCount
1
ClosedDate
CommentCount
10
CommunityOwnedDate
CreationDate
2013-03-25T23:21:46.500
FavoriteCount
0
LastActivityDate
2013-03-26T00:25:06.527
LastEditDate
2013-03-25T23:46:20.583
LastEditorUserId
2079481
OwnerUserId
2079481
ParentId
0
PostTypeId
1
Score
1
ViewCount
489
LastEditorDisplayName
text
Body
<p>I've created a textbox so when the admin types a name and clicks submit, it will shows a list of retrieved data from the database.</p> <pre><code> <form method="post" action=""> <?php $teacherName = $_POST['teacherName']; if ($_POST['submitted'] == 1) { if($teacherName != ""){ $getName = mysql_query("SELECT name, user_id FROM members WHERE name = '$teacherName'"); $teacherdetails = mysql_fetch_array($getName); $teachername = $teacherdetails['name']; $teacher_id = $teacherdetails['user_id']; if($teachername != ""){ print $teachername . "<br/>"; } else { print "Give a valid name <br/>"; } } } if ($teachername == ""){ ?> Teacher name:<input type="text" size="20" name="teacherName"><input type="hidden" name="submitted" value="1"><br/> <input type="submit" value="Submit" /> <?php $getModule = mysql_query("......"); while ($row2 = mysql_fetch_array($getModule)) { ?> <input type="checkbox" name="modules[]" value="<?php print $row2["module_id"]?>"/> <?php print $row2["module_name"] . '<br/>'; } ?> </div><br/> <?php } ?> <input type="submit" value="Submit" /> </form> </code></pre> <p>Below I wrote this code (in the same script):</p> <pre><code><?php $modules = $_POST['modules']; for($i = 0; $i < count($modules); $i++){ $module=mysql_query("INSERT INTO module (module_id,user_id) VALUES ('$modules[$i]','$teacher_id')"); } ?> </code></pre> <p>but for some reason when I call the variable "$teacher_id" (which is the value I retrieved before from the database. It works fine in the form) it returns nothing. It's null but I can't understand why.</p> <p>Am I doing something wrong? </p>
Tags
<php><html><mysql><forms><textbox>
Title
PHP variable returns a null value
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USshieldcy
UserOwnerUserId
1. USshieldcy
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
  POPHP variable returns a null value
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTApproveEditSuggestion
2. VO
  singulars
  PostPostId
  POPHP variable returns a null value
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTUpMod
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.