public function Field::__construct in Bibliography Module 7

Field init function.

Create a new Field object from passed arguments.

Parameters

array Array ( tagno, ind1, ind2, subfield_data ):

Return value

string Returns warnings if any issued during parse

File

modules/marcParse/php-marc.php, line 832

@package PHP-MARC

Class

Field

Field Class Create a MARC Field object.

Code

public function __construct() {
  $args = func_get_args();
  $tagno = array_shift($args);
  $this->tagno = $tagno;

  // Check if valid tag.
  if (!preg_match("/^[0-9A-Za-z]{3}\$/", $tagno)) {
    return $this
      ->_warn("Tag \"{$tagno}\" is not a valid tag.");
  }

  // Check if field is Control field.
  $this->is_control = preg_match("/^\\d+\$/", $tagno) && $tagno < 10;
  if ($this->is_control) {
    $this->data = array_shift($args);
  }
  else {
    foreach (array(
      "ind1",
      "ind2",
    ) as $indcode) {
      $indicator = array_shift($args);
      if (!preg_match("/^[0-9A-Za-z ]\$/", $indicator)) {
        if ($indicator != "") {
          $this
            ->_warn("Illegal indicator '{$indicator}' in field '{$tagno}' forced to blank");
        }
        $indicator = " ";
      }
      $this->{$indcode} = $indicator;
    }
    $subfields = array_shift($args);
    if (count($subfields) < 1) {
      return $this
        ->_warn("Field {$tagno} must have at least one subfield");
    }
    else {
      $this
        ->add_subfields($subfields);
    }
  }
}