errorInfo（）[2]，PHP 5.3中是否出现意外的“ [”？

Question

This simple line

$prep = $this->pdo->prepare($sql) or common::error("PDO prepare error: ".$prep->errorInfo()[2]);

is working on PHP 5.5, but fails on PHP5.3 (even if the PHP documentation says that PDOStatement::errorInfo returns an array on php 5.1+) saying:

Parse error: syntax error, unexpected '[' in ...

I use it many times in my application, and unfortunately I can't update the PHP version on this machine. Any workaround?

Answer 1

Just break it up into two steps:

$error = $prep->errorInfo();
$error_msg = $error[2];

$prep = $this->pdo->prepare($sql) or common::error("PDO prepare error: ".$error_msg);

FYI, this is called Array Dereferencing and became available in PHP 5.4.