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POPHP syntax that will set a variable within a foreach loop using an array of variable names
 

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    <p>I am trying to define a set of variables by setting them from SESSION and POST variables of the same name. (I.e. I want to transfer $_SESSION['a'] to $a.</p> <p>I am trying to use an array of variables names (a, b, c) to define such a set using a foreach loop, but am having when trying to define them I end up with syntax like $$variable within the loop, which does not work. I've tried single and double quotes around the $variable, but no joy </p> <pre><code>$data = array ( 'a', 'b', 'c', ); foreach($data as $variable) { if (isset($_POST['$variable'])) $_SESSION['$variable']=$_POST['$variable']; if (isset($_SESSION['$variable'])) {$$variable=$_SESSION['$variable'];} else {$$variable="";} } </code></pre> <p>Any help greatly appreciated.</p> <p>I'm trying end up with many instances of something like:</p> <pre><code> if (isset($_POST['$a'])) $_SESSION['$a']=$_POST['$a']; if (isset($_SESSION['$a'])) {$a=$_SESSION['$a'];} else {$a="";} </code></pre>
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    1. COOh dang, I accidentally deleted the intro explanation, let me edit
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    2. COVariables are only interpolated in double quotes, not single quotes. And here was no need for either in the first place.
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    3. COpossible duplicate of [Why is PHP not replacing the variable in string?](http://stackoverflow.com/questions/11317743/why-is-php-not-replacing-the-variable-in-string)
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