[解決済み] SQLSTATE[HY093]: 無効なパラメータ番号: バインドされた変数の数が102行目のトークンの数と一致しない [終了］

質問

SQLSTATE[HY093]のエラーが出ています。Invalid parameter number: number of bound variables does not match number of tokens 下記comments.phpの102行目にて。

<?php

/**
 * Class to handle articles
 */

class Comment
{
  // Properties

  /**
  * @var int The article ID from the database
  */
  public $id = null;

  /**
  * @var int When the article is to be / was first published
  */
  public $publicationDate = null;

  /**
  * @var string Full title of the article
  */
  public $title = null;

  /**
  * @var string The HTML content of the article
  */
  public $content = null;

    /**
     * @var int The article ID from the database
     */
    public $articleid = null;


  /**
  * Sets the object's properties using the values in the supplied array
  *
  * @param assoc The property values
  */

  public function __construct( $data=array() ) {
    if ( isset( $data['id'] ) ) $this->id = (int) $data['id'];
    if ( isset( $data['publicationDate'] ) ) $this->publicationDate = (int) $data['publicationDate'];
    if ( isset( $data['title'] ) ) $this->title = preg_replace ( "/[^\.\,\-\_\'\"\@\?\!\:\$ a-zA-Z0-9()]/", "", $data['title'] );
    if ( isset( $data['content'] ) ) $this->content = $data['content'];
      if ( isset( $data['articleid'] ) ) $this->articleid = (int) $data['articleid'];
  }


  /**
  * Sets the object's properties using the edit form post values in the supplied array
  *
  * @param assoc The form post values
  */

  public function storeFormValues( $params ) {

    // Store all the parameters
    $this->__construct( $params );

    // Parse and store the publication date
    if ( isset($params['publicationDate']) ) {
      $publicationDate = explode ( '-', $params['publicationDate'] );

      if ( count($publicationDate) == 3 ) {
        list ( $y, $m, $d ) = $publicationDate;
        $this->publicationDate = mktime ( 0, 0, 0, $m, $d, $y );
      }
    }
  }


  public static function getById( $id ) {
    $conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
    $sql = "SELECT *, UNIX_TIMESTAMP(publicationDate) AS publicationDate FROM comments WHERE id = :id";
    $st = $conn->prepare( $sql );
    $st->bindValue( ":id", $id, PDO::PARAM_INT );
    $st->execute();
    $row = $st->fetch();
    $conn = null;
    if ( $row ) return new Comment( $row );
  }


  /**
  * Returns all (or a range of) Article objects in the DB
  *
  * @param int Optional The number of rows to return (default=all)
  * @param string Optional column by which to order the articles (default="publicationDate DESC")
  * @return Array|false A two-element array : results => array, a list of Article objects; totalRows => Total number of articles
  */

    public static function getList( $art=1, $order="publicationDate DESC", $numRows=10000 ) {
    $conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
    $sql = "SELECT SQL_CALC_FOUND_ROWS *, UNIX_TIMESTAMP(publicationDate) AS publicationDate FROM comments WHERE articleid = :art 
        ORDER BY " . mysql_escape_string($order) . " LIMIT :numRows";

    $st = $conn->prepare( $sql );
    $st->bindValue( ":art", $art, PDO::PARAM_INT );
    $st->execute();
    $list = array();

    while ( $row = $st->fetch() ) {
      $comments = new Comment( $row );
      $list[] = $comment;
    }
  }


  /**
  * Inserts the current Article object into the database, and sets its ID property.
  */

  public function insert() {

    // Insert the Article
    $conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
    $sql = "INSERT INTO comments ( publicationDate, title, content, articledid ) VALUES ( FROM_UNIXTIME(:publicationDate), :title, :content, :articleid )";
    $st = $conn->prepare ( $sql );
    $st->bindValue( ":publicationDate", $this->publicationDate, PDO::PARAM_INT );
    $st->bindValue( ":title", $this->title, PDO::PARAM_STR );
    $st->bindValue( ":content", $this->content, PDO::PARAM_STR );
    $st->bindValue( ":articleid", $this->articleid, PDO::PARAM_STR );
    $st->execute();
    $this->id = $conn->lastInsertId();
    $conn = null;
  }


  /**
  * Updates the current Article object in the database.
  */

  public function update() {

    // Update the Article
    $conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
    $sql = "UPDATE comments SET publicationDate=FROM_UNIXTIME(:publicationDate), title=:title, summary=:summary, content=:content, articleid=:articleid,imageExtension=:imageExtension WHERE id = :id";
    $st = $conn->prepare ( $sql );
    $st->bindValue( ":publicationDate", $this->publicationDate, PDO::PARAM_INT );
    $st->bindValue( ":title", $this->title, PDO::PARAM_STR );
    $st->bindValue( ":content", $this->content, PDO::PARAM_STR );
      $st->bindValue( ":articleid", $this->articleid, PDO::PARAM_STR );
    $st->bindValue( ":id", $this->id, PDO::PARAM_INT );
    $st->execute();
    $conn = null;
  }


  /**
  * Deletes the current Article object from the database.
  */

  public function delete() {


    // Delete the Article
    $conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
    $st = $conn->prepare ( "DELETE FROM comments WHERE id = :id LIMIT 1" );
    $st->bindValue( ":id", $this->id, PDO::PARAM_INT );
    $st->execute();
    $conn = null;
  }

}

?>

解決方法は？

すべてのバインディングをここにバインドしていません。

$sql = "SELECT SQL_CALC_FOUND_ROWS *, UNIX_TIMESTAMP(publicationDate) AS publicationDate     FROM comments WHERE articleid = :art 
ORDER BY " . mysqli_escape_string($order) . " LIMIT :numRows";

$st = $conn->prepare( $sql );
$st->bindValue( ":art", $art, PDO::PARAM_INT );

numRowsというバインディングを宣言しましたが、実際には何もバインドしていません。

UPDATE 2019: 私はこれに関してupvoteを受け続けていて、それで別の提案を思い出しました。

ダブルクォートはPHPの文字列補間なので、ダブルクォートの文字列で変数を使うなら、concat演算子を使っても意味がない。逆に、シングルクォートは文字列補間ではないので、もし文字列の最後に1つだけ変数があるような場合は意味がありますし、文字列全体に対して使えばいいだけです。

実は、インタプリタが文字列を解析して変数を探すことにこだわらないので、ここでマイクロオペが利用できるのです。ブーストはほとんど目立たず、小規模ならまったく無視できます。しかし、非常に大規模なアプリケーション、特に古き良きレガシーモノリスでは、文字列がこのように使用された場合、顕著な性能向上が期待されます。(そして、IMOは、とにかく読みやすいのです)