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Full Discussion: Indirect variables in Bash
Top Forums Shell Programming and Scripting Indirect variables in Bash Post 302769112 by Scrutinizer on Monday 11th of February 2013 08:32:40 AM
Old 02-11-2013
Because if $path is obtained from user input or an input file, or otherwise not under your control someone could execute code with the permissions of the person executing the script.

If you are using bash 4 or you could switch to ksh93 then an alternative might be associative arrays:

Code:
leg=([AB]=50 [CD]=40)
echo "${leg[AB]}"

This User Gave Thanks to Scrutinizer For This Post:
 

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APACHE_SETENV(3)							 1							  APACHE_SETENV(3)

apache_setenv - Set an Apache subprocess_env variable

SYNOPSIS
bool apache_setenv (string $variable, string $value, [bool $walk_to_top = false]) DESCRIPTION
apache_setenv(3) sets the value of the Apache environment variable specified by $variable. Note When setting an Apache environment variable, the corresponding $_SERVER variable is not changed. PARAMETERS
o $variable - The environment variable that's being set. o $value - The new $variable value. o $walk_to_top - Whether to set the top-level variable available to all Apache layers. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Setting an Apache environment variable using apache_setenv(3) <?php apache_setenv("EXAMPLE_VAR", "Example Value"); ?> NOTES
Note apache_setenv(3) can be paired up with apache_getenv(3) across separate pages or for setting variables to pass to Server Side Includes (.shtml) that have been included in PHP scripts. SEE ALSO
apache_getenv(3). PHP Documentation Group APACHE_SETENV(3)
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