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Full Discussion: Swapping in VI editor
Top Forums UNIX for Dummies Questions & Answers Swapping in VI editor Post 302328508 by fpmurphy on Wednesday 24th of June 2009 12:18:44 PM
Old 06-24-2009
Perhaps an example would help you. Suppose you have the following text file
Code:
abcdefg
faaaag
accxxcck
abbde

and want to use vi to search and replace all instances of 'b', 'c', 'd' and 'e' with 'Q',
you can do with the following command ":%s/[b-e]/Q/g' which results in
Code:
aQQQQfg
faaaag
aQQxxQQk
aQQQQ

Here is an except from a typical vi man page regarding substitute:
Code:
    [range] s[ubstitute] [/pattern/replace/] [options] [count] [flags]
    [range] & [options] [count] [flags]
    [range] ~ [options] [count] [flags]
        Make substitutions. In the substitution string, the characters ~ and %
        may have special meanings. If the entire replace pattern is a percent
        sign (%), the previous replacement pattern is used. (This can be
        useful for repeating substitutions that contain back references.) The
        special character ~ inserts the previous replacement string into this
        replacement string.
        The options can be any of the following:

        c
            Ask for confirmation before replacing the text.

        g
            Perform the replacement on all occurrences of the regular
            expression on the line.

        r
            If no regular expression was specified, use the most recent
            regular expression (used for a search) rather than the same
            regular expression as used for the last substitute command.

 

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LEARN ABOUT PHP

mb_ereg_search_init

MB_EREG_SEARCH_INIT(3)							 1						    MB_EREG_SEARCH_INIT(3)

mb_ereg_search_init - Setup string and regular expression for a multibyte regular expression match

SYNOPSIS

       bool mb_ereg_search_init (string  $string, [string  $pattern], [string  $option = "msr"])

DESCRIPTION

       mb_ereg_search_init(3)  sets  $string  and  $pattern  for  a  multibyte	regular  expression.  These values are used for mb_ereg_search(3),
       mb_ereg_search_pos(3), and mb_ereg_search_regs(3).

PARAMETERS

	      o $string
		- The search string.

	      o $pattern
		- The search pattern.

	      o $option
		- The search option.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

NOTES

       Note

	      The internal encoding or the character encoding specified by mb_regex_encoding(3) will be used as the character  encoding  for  this
	      function.

SEE ALSO

       mb_regex_encoding(3), mb_ereg_search_regs(3).

PHP Documentation Group 												    MB_EREG_SEARCH_INIT(3)
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