Form process

<?php
date_default_timezone_set('UTC');

class Form {
  protected $dbh, $db_table;
  protected $required_data, $received_data, $errors;
  public $email_body, $email_template, $email_to, $email_subject, $email_from;

  public function __construct( $connection_data = null ) {
    if( isset($connection_data) ) {
      $this->db_connect( $connection_data );
    }
  }

  public function required_data( $array ) {
    if( isset($array) ) {
      if( !is_array($array) ) {
        // Convert CSV.
        $array = explode( ",", $array);
      }

      return $this->required_data = $array;
    }

    else {
      return $this->required_data;
    }
  }

  public function check_required_data($array) {
    if( !isset($this->required_data) ) {
      return false;
    }

    foreach( $this->required_data as $f ) {
      // Ensure it is passed in (from config) and the value exists(from form)
      // fromformfromformfromform
      // print_r( $array );

      if( !in_array($f, array_keys($array)) ||
        !isset($array[$f]) ||
        $array[$f] == null ) {
        $this->errors[] .= "Please complete $f field.";
      }
    }

    if( sizeof($this->errors) > 0 ) {
      foreach( $this->errors as $e ) { echo "$e\n"; }
      return false;
    } else {
      return true;
    }
  }

  public function db_connect( $connect ) {
    // TODO: sqlite no uname/pw
    if( !isset($connect['type']) ||
      !isset($connect['location']) ||
      !isset($connect['dbname']) ||
      !isset($connect['username']) ||
      !isset($connect['password']) )
    {
      exit( "Required connection data: type, location, name, username, password" );
    }

    if( isset($connect['table']) ) {
      $this->db_table = $connect['table'];
    }

    try {
      $this->dbh = new PDO( $connect['type'] .
        (isset($connect['location']) ? ":host=". $connect['location'] : null) .
        (isset($connect['dbname']) ? ";dbname=". $connect['dbname'] : null),
        $connect['username'], $connect['password'] );

      $this->dbh->setAttribute(PDO::ATTR_ERRMODE,  PDO::ERRMODE_EXCEPTION);
    }
    catch(PDOException $e) {
      // Throw error?
      exit( "Failed to connect to database.  Please try again later." );
      return false;
    }

    return true;
  }

  public function add_to_db( $array ) {
    if( !isset($this->dbh) ) {
      exit("Cannot find database connection.  Please re-instantiate.");
    }

    if( !isset($array) ) {
      exit( "column and value data required: array( key => value, key => value )" );
    }

    $columns = implode( ", ", array_keys( $array ));

    foreach( $array as $key => $value ) {
      // Replace key with PDO friendly lookup.
      array_shift($array);

      $array[":$key"] = $value;
    }

    $values = implode( ", ", array_keys($array) );

    try {
      $query = $this->dbh->prepare( "INSERT INTO $this->db_table ($columns) VALUES ($values)" );
      $query->execute( $array );
    }
    catch(PDOException $e) {
      return 'database';
    }

    return "success";
  }

  public function query_db() { }
  public function email_body( $string ) {
    return ( isset($string) ? $this->email_body     = $string : $this->email_body );
  }
  public function email_template( $file ) {
    return ( isset($string) ? $this->email_template = $string : $this->email_template );
  }
  public function email_to( $string ) {
    return ( isset($string) ? $this->email_to       = $string : $this->email_to );
  }
  public function email_subject( $string ) {
    return ( isset($string) ? $this->email_subject  = $string : $this->email_subject );
  }
  public function email_from( $string ) {
    return ( isset($string) ? $this->email_from     = $string : $this->email_from );
  }

  public function send_email( $array = null ) {
    // $params = func_get_args();
    ( isset($array["email_to"])       ? $this->email_to       = $array["email_to"]       : null );
    ( isset($array["email_template"]) ? $this->email_template = $array["email_template"] : null );
    ( isset($array["email_body"])     ? $this->email_body     = $array["email_body"]     : null );
    ( isset($array["email_subject"])  ? $this->email_subject  = $array["email_subject"]  : null );

    if( !isset( $this->email_to ) || !isset( $this->email_body ) || !isset( $this->email_subject ) ) {
      exit( "Required data missing:: email_to = $this->email_to / email_body = $this->email_body / email_subject = $this->email_subject" );
    }

    $from = ( isset($this->email_from) ? $this->email_from : $this->email_to );

    $header = 'MIME-VERSION: 1.0' ."\r\n".
    'Content-type: text/html; charset=iso-8859-1' . "\r\n" .
    'From:'. $this->email_to ."\r\n" .
    'Reply-To:'. $from ."\r\n";

    ini_set( 'sendmail_from', $from );

    mail( $this->email_to, $this->email_subject, $this->email_body, $header, '-f'. $from );
    return true;
  }

  public function upload_file( $file, $path, $salt ) {
    // Unchecked.
    $accept = array( "application/msword","application/doc","application/vnd.openxmlformats-officedocument.wordprocessingml.document","application/pdf","application/x-pdf","application/acrobat","applications/vnd.pdf","text/pdf","text/x-pdf","application/x-iwork-pages-sffpages","text/plain","text/richtext","text/rtf","application/rtf","application/richtext" );

    preg_match( "/([^.]+)$/i", $file["file"]['name'], $ext );
    $save_path = $path . hash('sha256', $salt) .'.'. $ext[1];

    if( !in_array($file['type'], $accept) ) {
      exit( "Uploaded file cannot be accepted" );
    }

    if( !move_uploaded_file(
      $file["tmp_name"],
      $_SERVER['DOCUMENT_ROOT'] . $save_path) )
    {
      exit( "Upload failed.");
    }

  }
}

?>