PHP - Search array for string

The proper thing to do is to insert a WHERE statement into your database query:

SELECT * FROM table WHERE value != 0

However, if you are limited to PHP just use the below code :)

   foreach($values AS $key => $value) {
      //Skip the value if it is 0
      if($value == 0) {
        continue;
      }

      //do something with the other values
    }

In order to clean an array of elements, you can use the array_filter method.

In order to clean up of zeros, you should do the following:

function is_non_zero($value)
{
    return $value != 0;
}

$filtered_data = array_filter($data, 'is_non_zero');

This way if you need to iterate multiple times the array, the zeros will already be deleted from them.

you can use array_filter for this. You can also specify a callback function in this function if you want to remove items on custom criteria.

Maybe try:

$out = array_filter(explode(',', $string), function ($v) { return ($v != 0); });

There are a LOT of ways to do this, as is obvious from the answers above.

While this is not the best method, the logic of this might be easier for phpnewbies to understand than some of the above methods. This method could also be used if you need to keep your original values for use in a later process.

$nums = '0,12,0,15,58,0,16';
$list = explode(',',$nums);
$newList = array();
foreach ($list as $key => $value) {
    //
    // if value does not equal zero
    //
    if ( $value != '0' ) {
        //
        // add to newList array
        //
        $newList[] = $value;
    }
}
echo '<pre>';
print_r( $newList );
echo '</pre>';

However, my vote for the best answer goes to @Lumbendil above.

$String = '0,12,0,15,58,0,16';
$String = str_replace('0', '',$String); // Remove 0 values
$Array = explode(',', $String);
foreach ($Array AS $Values) { 
     echo $Values."<br>";
    }

Explained:

You have your checkbox, lets say the values have been converted into a string. using str_replace we have removed all 0 values from your string. We have then created an array by using explode, and using the foreach loop. We are echoing out all the values of th array minux the 0 values.

Oneliner:

$string = '0,12,0,15,58,0,16';
echo preg_replace(array('/^0,|,0,|,0$/', '/^,|,$/'), array(',', ''), $string); // output 12,15,58,16