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Full Discussion: Dynamically setting of environment variable... Can it be done?
Top Forums Shell Programming and Scripting Dynamically setting of environment variable... Can it be done? Post 302555527 by Corona688 on Thursday 15th of September 2011 03:30:31 AM
Old 09-15-2011
Something more like your code:

Code:
data_file_123="whatever"
PARAM="123"
VAR="data_file_${PARAM}"
[ -f "${!VAR}" ] && echo "The file ${!VAR} exists"

This User Gave Thanks to Corona688 For This Post:
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LEARN ABOUT PHP

apache_setenv

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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