Similarly, not using "" around the variables is not specific to open. "$var" creates a new variable which is the string representation of the specified variable. It's almost never needed, and it's often undesireable.
In this case, your variable is already a string, and if it wasn't. If it wasn't, it would get converted to a string automatically.
I can think of two uses for "$var":
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When using a global variable as an argument. (For example, log_error("$@") is safer than log_error($@).)
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When you want to explicitely specifiy the context for an overloaded object. (For example, 4 + $obj and 4 + "$obj" could have different results.) You'd only use this when you know you have an overloaded object and you know you want the string representation in a numerical, boolean or list context (i.e. never).
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
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<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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