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check if value is null incl. zero
[php functions]

 

//check, if not null, or zero
function is_not_null_full($value) {
    if (is_array($value)) {
      if (sizeof($value) > 0) {
        return true;
      } else {
        return false;
      }
    } else {
      if ( (is_string($value) || is_int($value)) && ($value != '') && ($value != 'NULL') && (strlen(trim($value)) > 0) && !empty($value)) {
        return true;
      } else {
        return false;
      }
    }
  }