Question

What's this ?_

Asked by: speyfisher

I'm viewing some code and came across a variable "$_".  Never saw that used before...

Does this have any special meaning, common use, lazy typing, what?

$_=func_get_args();
 
if (sizeof($_) < 3) {
  return -1;
}
 
$row = $_[0];
$col = $_[1];
$num = $_[2];

                                  
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Asked On
2009-03-02 at 17:03:18ID24192113
Topic

PHP Scripting Language

Participating Experts
2
Points
125
Comments
2

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Answers

 

by: mr_egyptianPosted on 2009-03-02 at 17:35:03ID: 23780200

In my opinion, though valid, this is bad practice.  A legal php variable begins with a dollar sign, followed by an underscore or letter, followed by any combination of letters numbers and underscores.  Variables that begin with an underscore, such as $_GET and $_SESSION are "special" built in functions, so using the same convention can be confusing.  The snippet you posted is simply assing the value of func_get_args(), which "Returns an array comprising a function's argument list", to the variable $_

 

by: quincydudePosted on 2009-03-02 at 17:36:47ID: 23780204

It's just a normal variable that  you can use to assign anything to it...

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