syntax - How to echo php variable from array? -

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i need echo this:

echo "<a href="#">$some['variable']</a>

how can escape [] brackets echo variable in link?

echo "<a href='#'>" . $some['variable'] . "</a>";

or 

echo "<a href=\"#\">" . $some['variable'] . "</a>";

or

echo "<a href='#'>{$some['variable']}</a>";

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