php - "Call-time pass-by-reference has been removed"

Question

我正在尝试使用此存储库在 Dotcloud 上部署 Wordpress，但日志中出现错误:

18:59:19: [www.0] Running postinstall script...
18:59:21: [www.0] PHP Fatal error:  Call-time pass-by-reference has been removed in /home/dotcloud/rsync-1353715101184/dotcloud-scripts/feed-wp-config.php on line 86

查看line 86 in feed-wp-config.php ，内容如下:

$content = preg_replace('/(define\(\'' . $property . '\', \')(.*)(\'\);)/', '${1}' . $value . '${3}', $content, -1, &$count);

当我转到 Wordpress 起始页时，它说，“似乎没有 wp-config.php 文件。在我们开始之前我需要这个。”

我已经 cross-posted this to the repo's Github issue tracker , 但由于还没有回复，我也将其张贴在这里，希望有人知道答案。

Answer 1

将 &$count 替换为 $count。 & 表示您希望通过引用而不是值传递变量:

Documentation says

There is no reference sign on a function call - only on function definitions. Function definitions alone are enough to correctly pass the argument by reference. As of PHP 5.3.0, you will get a warning saying that "call-time pass-by-reference" is deprecated when you use & in foo(&$a);.

所以如果你想通过函数的引用传递变量，你应该在函数声明中使用&:

现在应该这样做:

// right
function foo(&$var) {
...
}

foo($foo);

但不是那样(当您收到此警告时):

function foo($var) {
...
}

foo(&$foo);   // <--- wrong