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Top Forums Shell Programming and Scripting Modifying the values of dynamically named arrays Post 302635227 by Corona688 on Friday 4th of May 2012 12:11:56 PM
Old 05-04-2012
What's your system? What's your shell? And what are you actually trying to do, here? If you need to use eval to do something, you might have taken the wrong fork in the road somewhere, or might even be using the wrong programming language.

There's alternatives to arrays for instance. You can keep lists inside strings like "a b c d e" and split at need. Or in KSH, you can use associative arrays, and use entire strings as array indexes, letting you use one big array and avoiding the need for eval yet again.
 

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COMPACT(3)								 1								COMPACT(3)

compact - Create array containing variables and their values

SYNOPSIS
array compact (mixed $varname1, [mixed $...]) DESCRIPTION
Creates an array containing variables and their values. For each of these, compact(3) looks for a variable with that name in the current symbol table and adds it to the output array such that the variable name becomes the key and the contents of the variable become the value for that key. In short, it does the opposite of extract(3). Any strings that are not set will simply be skipped. PARAMETERS
o $varname1 -compact(3) takes a variable number of parameters. Each parameter can be either a string containing the name of the variable, or an array of variable names. The array can contain other arrays of variable names inside it; compact(3) handles it recursively. RETURN VALUES
Returns the output array with all the variables added to it. EXAMPLES
Example #1 compact(3) example <?php $city = "San Francisco"; $state = "CA"; $event = "SIGGRAPH"; $location_vars = array("city", "state"); $result = compact("event", "nothing_here", $location_vars); print_r($result); ?> The above example will output: Array ( [event] => SIGGRAPH [city] => San Francisco [state] => CA ) NOTES
Note Gotcha Because variable variables may not be used with PHP's Superglobal arrays within functions, the Superglobal arrays may not be passed into compact(3). SEE ALSO
extract(3). PHP Documentation Group COMPACT(3)
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