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Full Discussion: Change only the name of a variable
Top Forums Shell Programming and Scripting Change only the name of a variable Post 302458961 by agama on Saturday 2nd of October 2010 11:40:02 PM
Old 10-03-2010
Assuming that all alpha characters, all digits, the underbar (_) and dot (.) can be considered a part of a file name, this might be what you need:

Code:
sed -E 's/([^a-zA-Z0-9_.])z([^a-zA-Z0-9_.])/\1foo\2/g' src-file >output

Replace foo with whatever you need z to be replaced with. You may need to change the -E to -r if you are not using the sed that is Berkeley based or a part of the AT&T AST tool set.

I included the dot character as I assume that things like object.z() was not to have the z replaced. This works on the sample you provided, at least as far as I was willing to eyeball, so it hasn't been completely verified.
 

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LEARN ABOUT PHP

session_unregister

SESSION_UNREGISTER(3)							 1						     SESSION_UNREGISTER(3)

session_unregister - Unregister a global variable from the current session

SYNOPSIS

       bool session_unregister (string	$name)

DESCRIPTION

       session_unregister(3) unregisters the global variable named $name from the current session.

       Warning

	      This function has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.

PARAMETERS

	      o $name
		- The variable name.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

NOTES

       Note

	       If  $_SESSION  (or  $HTTP_SESSION_VARS  for  PHP  4.0.6	or  less)  is  used, use unset(3) to unregister a session variable. Do not
	      unset(3)$_SESSION itself as this will disable the special function of the $_SESSION superglobal.

       Caution

	       This function does not unset the corresponding global variable for $name, it only prevents the variable from being saved as part of
	      the session. You must call unset(3) to remove the corresponding global variable.

       Caution

	       If  you	are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(3), session_is_registered(3) and session_unregis-
	      ter(3).

PHP Documentation Group 												     SESSION_UNREGISTER(3)
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