Echo certain pieces of text only if a value is filled in

[jcodi]

Hey, guys, I'm new in the whole php thing.

I believe what I am asking here is super simple to do, I just wasn't able to find it anywhere.

In the code below, you guys will notice that not all the fields show in every change of the dropdown menu TYPE, and, of course they don't, that's the whole point. I mean, I have arranged for each TYPE to have it's own fields. The thing is: how can I adapt for the html ECHO code to show ONLY the "labels", I mean, the pieces of HTML in the while($row = mysqli_fetch_array($result)), for the fields that were filled in? I mean, I don't want that in RESULT there are the "labels" of the fields whose values are there.

<?php
$con=mysqli_connect("localhost","root","","activitytest1");
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

if (isset($_POST['submit'])) {
$stmt = mysqli_prepare($con, "INSERT INTO activitytest1 (type, author, taskpre, taskdescription, outcome, semipre, semiwhile, exercisedescription, practicepre, practiceinstructions, leadin, gamepre, gameinstructions, videopre, videowhile, videopost, songpre, songwhile, songpost, mimioinstructions, otherinstructions, path, books, grouping, time)
VALUES
(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)");

mysqli_stmt_bind_param($stmt, 'sssssssssssssssssssssssss', $type, $author, $taskpre, $taskdescription, $outcome, $semipre, $semiwhile, $exercisedescription, $practicepre, $practiceinstructions, $leadin, $gamepre, $gameinstructions, $videopre, $videowhile, $videopost, $songpre, $songwhile, $songpost, $mimioinstructions, $otherinstructions, $path, $books, $grouping, $time);

$type = $_POST['type'];
$author = $_POST['author'];
$taskpre = $_POST['taskpre'];
$taskdescription = $_POST['taskdescription'];
$outcome = $_POST['outcome'];
$semipre = $_POST['semipre'];
$semiwhile = $_POST['semiwhile'];
$exercisedescription = $_POST['exercisedescription'];
$practicepre = $_POST['practicepre'];
$practiceinstructions = $_POST['practiceinstructions'];
$leadin = $_POST['leadin'];
$gamepre = $_POST['gamepre'];
$gameinstructions = $_POST['gameinstructions'];
$videopre = $_POST['videopre'];
$videowhile = $_POST['videowhile'];
$videopost = $_POST['videopost'];
$songpre = $_POST['songpre'];
$songwhile = $_POST['songwhile'];
$songpost = $_POST['songpost'];
$mimioinstructions = $_POST['mimioinstructions'];
$otherinstructions = $_POST['otherinstructions'];
$path = $_POST['path'];
$books = $_POST['books'];
$grouping = $_POST['grouping'];
$time = $_POST['time'];
$submit = $_POST['submit'];


mysqli_stmt_execute($stmt);
mysqli_stmt_close($stmt);
}

$result = mysqli_query($con,"SELECT * FROM activitytest1");

while($row = mysqli_fetch_array($result))
{
echo "<table width='909' border='1' align='center' cellpadding='5' cellspacing='0'>
<tr>
<th width='125' scope='col'>Type</th>
<th width='680' scope='col'>Description</th>
<th width='120' scope='col'>Author</th>
</tr></table>

<br/>

<table width='909' border='1' align='center' cellpadding='5' cellspacing='0'>
<tr>
<td width='125'>" . $row['type'] . "</th>
<td width='680'>Time:" . $row['time'] . " min. <br><br>" . $row['books'] . "<br/>Grouping: " . $row['grouping'] . "<br/>Preview the Task:" . $row['taskpre'] . "<br/>Instructions:" . $row['taskdescription'] . "<br/>Outcome:" . $row['outcome'] . "<br/>Preview the semi-task:" . $row['semipre'] . "<br/>Instructions:" . $row['semiwhile'] . "<br/>Exercise Instructions: " . $row['exercisedescription'] . "<br/> Preview the Practice:" . $row['practicepre'] . "<br/>Practice Instructions:" . $row['practiceinstructions'] . "<br/>Lead-in:" . $row['leadin'] . "<br/>Preview the Game:" . $row['gamepre'] . "<br/>Game Instructions:" . $row['gameinstructions'] . "<br/>Song PRE:" . $row['songpre'] . "<br/>Song WHILE:" . $row['songwhile'] . "<br/>Song POST:" . $row['songpost'] . "<br/>Video PRE:" . $row['videopre'] . "<br/>Video WHILE:" . $row['videowhile'] . "<br/>Video POST:" . $row['videopost'] . "<br/>Mimio Instructions:" . $row['mimioinstructions'] . "<br/>Instructions:" . $row['otherinstructions'] . "<br/><br>Link/Path" . $row['path'] . "<br/></th>
<td width='120'>" . $row['author'] . "</th>
</tr></table> <br/> <hr size='1'/>";
}

mysqli_close($con);
?>


<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test 1</title>
</head>
<body>

<br>
<table width="909" border="1" align="center" cellpadding="5" cellspacing="0">
<tr>
<th width="125" scope="col">Type</th>
<th width="680" scope="col">Description</th>
<th width="120" scope="col">Author</th>
</tr></table>
<br>
<form action="index.php" method="POST">

<table width="909" border="1" align="center" cellpadding="5" cellspacing="0">
<td width="125"><label>

</label>
<select name="type" id="type" onChange="display(this,'Task','Semi-task','Practice','Exercise','Lead-in', 'Game', 'Video','Song','Mimio','Other');">
<option value="Unselected" selected="selected">Choose one:</option>
<option value="Task">Task</option>
<option value="Semi-task">Semi-task</option>
<option value="Practice">Practice</option>
<option value="Exercise">Exercise</option>
<option value="Lead-in">Lead-in</option>
<option value="Game">Game</option>
<option value="Video">Video</option>
<option value="Song">Song</option>
<option value="Mimio">Mimio</option>
<option value="Other">Other</option>
</select></td>
<td width="680"><div id="Task" style="display:none"> Task: <br />
Lead-in/Preview the task: <textarea name="taskpre" cols="70" rows="2"></textarea>
<br />
Instructions: <textarea name="taskdescription" cols="70" rows="2"></textarea>
<br />
Outcome: 
<textarea name="outcome" cols="70" rows="2"></textarea>
<br />
</div>

<div id="Semi-task" style="display:none">Semi-task:<br />
Lead-in/Preview the task: <textarea name="semipre" cols="70" rows="2"></textarea>
<br />
Instructions: <textarea name="semiwhile" cols="70" rows="2"></textarea>
<br />
</div>

<div id="Exercise" style="display:none">Exercise:<br />
Instructions/Obs.: 
<textarea name="exercisedescription" cols="70" rows="2"></textarea>
</div>
<div id="Practice" style="display:none">
Practice:<br />
Lead-in/Preview the task: <textarea name="practicepre" cols="70" rows="2"></textarea>
<br />
Instructions: <textarea name="practiceinstructions" cols="70" rows="2"></textarea>
<br />
</div>

<div id="Lead-in" style="display:none">
Lead-in:<br>
<textarea name="leadin" cols="70" rows="2"></textarea><br>
</div>
<div id="Game" style="display:none">
Game:<br />
Lead-in: 
<textarea name="gamepre" cols="70" rows="2"></textarea>
<br />
Instructions: <textarea name="gameinstructions" cols="70" rows="2"></textarea>
</div>

<div id="Video" style="display:none"> Video: <br />
Pre: <textarea name="videopre" cols="70" rows="2"></textarea>
<br />
While: <textarea name="videowhile" cols="70" rows="2"></textarea>
<br />
Post: 
<textarea name="videopost" cols="70" rows="2"></textarea>
</div>

<div id="Song" style="display:none"> Song: <br />
Pre: <textarea name="songpre" cols="70" rows="2"></textarea>
<br />
While: <textarea name="songwhile" cols="70" rows="2"></textarea>
<br />
Post: 
<textarea name="songpost" cols="70" rows="2"></textarea>
</div>

<div id="Mimio" style="display:none">Mimio:<br />
Instructions:<br>
<textarea name="mimioinstructions" cols="70" rows="2"></textarea>
</div>

<div id="Other" style="display:none">Other:<br />
Instructions:<br>
<textarea name="otherinstructions" cols="70" rows="2"></textarea><br />
</div> </td>
<td width="120"><input name="author" type="text" size="12" maxlength="25" /></td>
</tr>

<tr>
<td colspan="3">
<select name="books" id="Books">
<option value="books open" selected="selected">books open</option>
<option value="books closed">books closed</option>
</select>
<br />
<select name="grouping">
<option value="individual" selected="selected">individual</option>
<option value="pairs">pairs</option>
<option value="trios">trios</option>
<option value="groups of 3 to 4 students">groups of 3 to 4 students</option>
<option value="groups of 5 students">groups of 5 students</option>
<option value="divide the class into 2 groups">divide the class into 2 groups</option>
<option value="divide the class into 3 groups">divide the class into 3 groups</option>
<option value="divide the class into 4 groups">divide the class into 4 groups</option>
</select>
<br />
about 
<input name="time" type="text" id="Time" size="1" />
min </td>
</tr> 
<tr>
<td colspan="3">Link/Path: <input name="path" type="text" id="Path" size="40" /></td>
</tr>
<tr>
<td colspan="3"><input type="submit" name="submit" value="Post!" /></td>
</tr>
</table>
</form>


</body>
</html>

[mac_gyver]

if you post an example showing what you want, i'm pretty sure someone might be able to figure out what you are asking.

 

i for one don't see anything having to do with "labels", nor do i have any idea what you want to do based on which fields were filled in?

[jcodi]

Ok, sorry that it wasn't clear enough. Thanks for your feedback anyway.

 

Well, here we go, let me try to explain:

 

The page is a dropdown menu that, having each one of its options selected, will change the fields that show in the page.

I mean, when I select "Video" in the dropdown menu, it shows the fields - which are textareas: "videopre", "videowhile", and "videopost". If I select "Exercise", though, the only field it shows is "exerciseinstructions".

Al right, the java for that is working perfectly, but my problem starts here:

 

The code has what I'm calling "Labels" for the fields:

$result = mysqli_query($con,"SELECT * FROM activitytest1");

while($row = mysqli_fetch_array($result))
{
echo "<table width='909' border='1' align='center' cellpadding='5' cellspacing='0'>
<tr>
<th width='125' scope='col'>Type</th>
<th width='680' scope='col'>Description</th>
<th width='120' scope='col'>Author</th>
</tr></table>

<br/>

<table width='909' border='1' align='center' cellpadding='5' cellspacing='0'>
<tr>
<td width='125'>" . $row['type'] . "</th>
<td width='680'>Time:" . $row['time'] . " min. <br><br>" . $row['books'] . "<br/>Grouping: " . $row['grouping'] . "<br/>Preview the Task:" . $row['taskpre'] . "<br/>Instructions:" . $row['taskdescription'] . "<br/>Outcome:" . $row['outcome'] . "<br/>Preview the semi-task:" . $row['semipre'] . "<br/>Instructions:" . $row['semiwhile'] . "<br/>Exercise Instructions: " . $row['exercisedescription'] . "<br/> Preview the Practice:" . $row['practicepre'] . "<br/>Practice Instructions:" . $row['practiceinstructions'] . "<br/>Lead-in:" . $row['leadin'] . "<br/>Preview the Game:" . $row['gamepre'] . "<br/>Game Instructions:" . $row['gameinstructions'] . "<br/>Song PRE:" . $row['songpre'] . "<br/>Song WHILE:" . $row['songwhile'] . "<br/>Song POST:" . $row['songpost'] . "<br/>Video PRE:" . $row['videopre'] . "<br/>Video WHILE:" . $row['videowhile'] . "<br/>Video POST:" . $row['videopost'] . "<br/>Mimio Instructions:" . $row['mimioinstructions'] . "<br/>Instructions:" . $row['otherinstructions'] . "<br/><br>Link/Path" . $row['path'] . "<br/></th>
<td width='120'>" . $row['author'] . "</th>
</tr></table> <br/> <hr size='1'/>";

Here is an example (in bold what I'm calling a 'label'):

. "<br/>Preview the Task:" . $row['taskpre'])

 

So, I want that this piece of HTML ""<br/>Preview the Task:"" only shows if the value . $row['taskpre'] is filled in, and so forth, for all the oether ones. Otherwise, I don't want that the "<br/>Preview the Task:" echoes with the rest of the code, understand?

 

This is the ECHO that I get when I submit a "Task" (the task values are: 'taskpre', 'taskdescription' and 'outcome'):

 

I marked with a check what I want to echo and what's in red is what I don't want to echo when I select TASK.

 

Can you see what I would like to do now?

[mac_gyver]

wouldn't you just use conditional logic to test if each of those values is not an empty string to decide if you need to output each line?

[jcodi]

That's what I thought, but I am a total newbie at this and I don't know if an IF statement would work inside a WHILE statement (at least when I tried there were errors).

Can you help me by giving me a sample of how this code would be?