php array_push() -> How not to push if the array already contains the value

Question

I am using the following loop to add items to an an array of mine called $liste. I would like to know if it is possible somehow not to add $value to the $liste array if the

Answer 1

Two options really.

Option 1: Check for each item and don't push if the item is there. Basically what you're asking for:

foreach($something as $value) {
    if( !in_array($value,$liste)) array_push($liste,$value);
}

Option 2: Add them anyway and strip duplicates after:

foreach($something as $value) {
    array_push($liste,$value);
}
$liste = array_unique($liste);

By the look of it though, you may just be looking for $liste = array_unique($something);.