/**
* Binds the parameter $param to the specified variable name $placeHolder.
*
* This method uses ezcQuery::bindParam() from the ezcQuery class in which
* the subSelect was called. Info about bound parameters are stored in
* the parent ezcQuery object that is stored in the $outer property.
*
* The parameter $param specifies the variable that you want to bind. If
* $placeholder is not provided bind() will automatically create a
* placeholder for you. An automatic placeholder will be of the name
* 'placeholder1', 'placeholder2' etc.
*
* Example:
* <code>
* <?php
* $value = 2;
* $subSelect = $q->subSelect();
* $subSelect->select('*')
* ->from( 'table2' )
* ->where( $subSelect->expr->in(
* 'id', $subSelect->bindParam( $value )
* )
* );
*
* $q->select( '*' )
* ->from( 'table' )
* ->where ( $q->expr->eq( 'id', $subSelect ) );
*
* $stmt = $q->prepare(); // the parameter $value is bound to the query.
* $value = 4;
* $stmt->execute(); // subselect executed with 'id = 4'
* ?>
* </code>
*
* @see ezcQuery::bindParam()
*
* @param &mixed $param
* @param string $placeHolder the name to bind with. The string must start with a colon ':'.
* @return string the placeholder name used.
*/
public function bindParam(&$param, $placeHolder = null, $type = PDO::PARAM_STR)
{
return $this->outerQuery->bindParam($param, $placeHolder, $type);
}
