Question

I know this can be shortened and will come easy for someone. I’d like to use an expression to cut this down to a few lines. Each of these variables does hold a different value, and may or may not be present. Thanks for your help!

    if ( $lang1 ) {
        echo $lang1 ."<br>";
    }
    if ( $lang2 ) {
        echo $lang2 ."<br>";
    }
    if ( $lang3 ) {
        echo $lang3 ."<br>";
    }
    if ( $lang4 ) {
        echo $lang4 ."<br>";
    }
    if ( $lang5 ) {
        echo $lang5 ."<br>";
    }
    if ( $lang6 ) {
        echo $lang6 ."<br>";
    }
    if ( $lang7 ) {
        echo $lang7 ."<br>";
    }
    if ( $lang8 ) {
        echo $lang8 ."<br>";
    }
    if ( $lang9 ) {
        echo $lang9 ."<br>";
    }
    if ( $lang10 ) {
        echo $lang10 ."<br>";
    }
    if ( $lang11 ) {
        echo $lang11 ."<br>";
    }
    if ( $lang12 ) {
        echo $lang12 ."<br>";
    }
    if ( $lang13 ) {
        echo $lang13 ."<br>";
    }
    if ( $lang14 ) {
        echo $lang14 ."<br>";
    }
    if ( $lang15 ) {
        echo $lang15 ."<br>";
    }
    if ( $lang16 ) {
        echo $lang16 ."<br>";
    }
    if ( $lang17 ) {
        echo $lang17 ."<br>";
    }
    if ( $lang18 ) {
        echo $lang18 ."<br>";
    }       
    if ( $lang19 ) {
        echo $lang19 ."<br>";
    }
    if ( $lang20 ) {
        echo $lang20 ."<br>";
    }

Answer 1

Store the values in an array:

$langs = array(...);
foreach($langs as $lang)
    echo $lang . '<br>';

You can use array_push() to add elements to the array.