PHP PDO抛出语法错误，需要反馈

Question

我需要一些反馈，说明为什么以下是抛出SYNTAX错误：“意外'['，期待'）'”，它将是下面代码中的第二行：

if($deleteBeforeInsertFieldKey!==false){
    if($deleteQry->execute([$deleteBeforeInsertFieldKey=>$row[$deleteBeforeInsertFieldKey]])===false){
        throw new \Exception('There was a problem deleting a row prior to insert.');
    }
}