getting rid of null values

dj262501

I have a php page where user/db info is being passed:

<?php
include "include/dbc.php";

include "include/header.inc";

$exerciseid = $_POST["exerciseid"];
$duration = $_POST["duration"];
$distance = $_POST["distance"];
$metric = $_POST["metric"];

echo'<h1>Added Activities</h1>';



// name of array
echo '<h1>Exercise</h1>';
if (is_array($exerciseid)) {
        foreach ($exerciseid as $key => $value) {

    echo $key .' : '. $value .'<br />';

    }
}



// name of array
echo '<h1>Duration</h1>';
if (is_array($duration)) {
        foreach ($duration as $key => $value) {

                    echo $key .' : '. $value .'<br />';

    }
}


// name of array
echo '<h1>Distance</h1>';
if (is_array($distance)) {
        foreach ($distance as $key => $value) {

                    echo $key .' : '. $value .'<br />';

    }
}

// name of array
echo '<h1>Metric</h1>';
if (is_array($metric)) {
        foreach ($metric as $key => $value) {

                    echo $key .' : '. $value .'<br />';

    }
}

?>

And here is the output from that code:

Added Activities

Exercise
0 : Canoeing, on camping trip
1 : Canoeing, rowing, over 6 mph, vigorous effort
2 : Canoeing, rowing, crewing, competition
3 : Canoeing, rowing, light effort
4 : Canoeing, rowing, moderate effort
5 : Diving, springboard or platform
6 : Kayaking
7 : Sailing, boat/board, windsurfing, general
8 : Sailing, in competition
9 : Skiing, water
10 : Ski-mobiling, water
11 : Skin diving, scuba diving, general
12 : Snorkeling
13 : Surfing, body or board
14 : Swimming laps, freestyle, fast, vigorous effort
15 : Swimming laps, freestyle, light/moderate effort
16 : Swimming, backstroke, general
17 : Swimming, breaststroke, general
18 : Swimming, butterfly, general
19 : Swimming, leisurely, general
20 : Swimming, sidestroke, general
21 : Swimming, sychronized
22 : Swimming, treading water, fast/vigorous
23 : Swimming, treading water, moderate effort
24 : Water polo
25 : Water volleyball
26 : Whitewater rafting, kayaking, or canoeing

Duration
Canoeing, on camping trip : 20
Canoeing, rowing, over 6 mph, vigorous effort :
Canoeing, rowing, crewing, competition :
Canoeing, rowing, light effort :
Canoeing, rowing, moderate effort :
Diving, springboard or platform :
Kayaking :
Sailing, boat/board, windsurfing, general :
Sailing, in competition :
Skiing, water :
Ski-mobiling, water :
Skin diving, scuba diving, general :
Snorkeling :
Surfing, body or board :
Swimming laps, freestyle, fast, vigorous effort :
Swimming laps, freestyle, light/moderate effort :
Swimming, backstroke, general :
Swimming, breaststroke, general :
Swimming, butterfly, general :
Swimming, leisurely, general :
Swimming, sidestroke, general :
Swimming, sychronized :
Swimming, treading water, fast/vigorous :
Swimming, treading water, moderate effort :
Water polo :
Water volleyball :
Whitewater rafting, kayaking, or canoeing :

Distance
Canoeing, on camping trip : 20
Canoeing, rowing, over 6 mph, vigorous effort :
Canoeing, rowing, crewing, competition :
Canoeing, rowing, light effort :
Canoeing, rowing, moderate effort :
Diving, springboard or platform :
Kayaking :
Sailing, boat/board, windsurfing, general :
Sailing, in competition :
Skiing, water :
Ski-mobiling, water :
Skin diving, scuba diving, general :
Snorkeling :
Surfing, body or board :
Swimming laps, freestyle, fast, vigorous effort :
Swimming laps, freestyle, light/moderate effort :
Swimming, backstroke, general :
Swimming, breaststroke, general :
Swimming, butterfly, general :
Swimming, leisurely, general :
Swimming, sidestroke, general :
Swimming, sychronized :
Swimming, treading water, fast/vigorous :
Swimming, treading water, moderate effort :
Water polo :
Water volleyball :
Whitewater rafting, kayaking, or canoeing :

Metric
0 : mile
1 : mile
2 : mile
3 : mile
4 : mile
5 : mile
6 : mile
7 : mile
8 : mile
9 : mile
10 : mile
11 : mile
12 : mile
13 : mile
14 : mile
15 : mile
16 : mile
17 : mile
18 : mile
19 : mile
20 : mile
21 : mile
22 : mile
23 : mile
24 : mile
25 : mile
26 : mile

As you can see, null values are being passed as well. I am hoping that someone can show me the correct way to use php unset to get rid of these null values. Thank you.

dagon

i think you mean empty not null

in that case this should work

swap:

   echo $key .' : '. $value .'<br />';

for:

   

if(!empty($value){
echo $key .' : '. $value .'<br />';
}

dj262501

Thanks, but when I do that I get an 'array' message

dagon

not possible your just checking if the array value is empty or not.

dagon

ok there was a typo in my code but you would of just got a syntax error

<?php
$exerciseid=array('','b','','c');
if(is_array($exerciseid)){
    foreach($exerciseid as $key => $value){

  if(!empty($value))
    {
        echo $key.' : '.$value.'<br />';
    }

}
}

?>

ouput:

1 : b
3 : c

NB: array keys start at 0

dj262501

dagon;10964390 wrote:
ok there was a typo in my code but you would of just got a syntax error
<?php
$exerciseid=array('','b','','c');
if(is_array($exerciseid)){
    foreach($exerciseid as $key => $value){

  if(!empty($value))
    {
        echo $key.' : '.$value.'<br />';
    }

}
}

?>
ouput:

1 : b
3 : c

NB: array keys start at 0

Thank you!!! The distance and duration values are only showing user input now. The exerciseid and the metric values aren't though. Do you have an idea as to why they arent? Again, thank you