Script to find & replace a multiple lines string across multiple php files and subdirectories Post: 302604196

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Top Forums Shell Programming and Scripting Script to find & replace a multiple lines string across multiple php files and subdirectories Post 302604196 by agama on Saturday 3rd of March 2012 03:14:00 PM

03-03-2012

Registered User

Is the block of code the only block that starts <?php and finishes ?>? I suspect that maybe there are other blocks that start and end this way, but on the off chance that this will be the only block like this, then this sed should work:

Code:

sed '/<?php/,/?>/d'  "$file-" >"$file"

It deletes all lines between the starting line with "<?php" and the ending "?>" line as it reads the file. The updated file is written to $file.

If you can use this sed, just replace it in the earlier example.

If there are more than one php blocks of code, then you'll need to find a unique string inside the block that you want to delete. Change the one line in the script below that has "/enter your nickname/" to contain the unique string from the block of code and it should find and delete the lines containing the string.

Code:

#!/usr/bin/env ksh

cd /directory/path/where/you/want/to/start
find . -name "*.php" | while read file
do
    echo "munging: $file"             # nice to see progress as it works
    mv "$file" "$file-"      # back it up
    awk '     # read the file and delete the block of php code
    /<?php/ { drop = idx = 0; snarf = 1; }  # start of a block; start buffering

    /?>/ {                  # end of a block
        if( ! drop )        # magic string not found -- show this block
        {
            for( i = 0; i < idx; i++ )
                printf( "%s\n", buffer[i] );
            printf( "%s\n", $0 );
        }

        snarf = 0;          # turn off buffering
        next;
    }

    ### change the string between the slants to be something unique to the block you wish to delete. 
    /enter your nickname/ { drop = 1; }    # magic string found, drop if we are in a php block

    snarf {                 # if buffering, hold the record until end of block reached.
        buffer[idx++] = $0;
        next;
    }

    { print; }              # not buffering, just print the record.
    '  "$file-" >"$file"
    if (( $? > 0 ))            # handle failure by putting the file back in place
    then
        echo "edit of $file failed" >&2
        mv "$file-" "$file"             # restore original
    else
        rm "$file-"               # worked, delete backup 
    fi
done

Hope this helps get you going.

Last edited by agama; 03-04-2012 at 01:44 PM.. Reason: corrected comment that introduced a bug

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header

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header - Send a raw HTTP header

SYNOPSIS

       void header (string  $string, [bool  $replace = true], [int  $http_response_code])

DESCRIPTION

       header(3) is used to send a raw HTTP header. See the HTTP/1.1 specification for more information on HTTP headers.

	Remember  that	header(3) must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.
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       <html>
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       /* This will give an error. Note the output
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       header('Location: http://www.example.com/');
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PARAMETERS

	      o $string
		- The header string.  There are two special-case header calls. The first is a header that starts with the string " HTTP/" (case is
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	      o $replace
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	      ?>

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RETURN VALUES

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CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.1.2	|						    |
       |	|						    |
       |	|  This function now prevents more than one  header |
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EXAMPLES

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	      Caching directives

	       PHP scripts often generate dynamic content that must not be cached by the client browser or any proxy caches between the server and
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	      <?php
	      header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
	      header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
	      ?>

	      Note

		      You may find that your pages aren't cached even if you don't output all of the headers above. There are a number of  options
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		     should override any settings that may otherwise cause the output of your script to be cached.

		      Additionally, session_cache_limiter(3) and the session.cache_limiter configuration setting can be used to automatically gen-
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NOTES

       Note

	       Headers will only be accessible and output when a SAPI that supports them is in use.

       Note

	       You  can  use output buffering to get around this problem, with the overhead of all of your output to the browser being buffered in
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       Note

	       The HTTP status header line will always be the first sent to the client, regardless of the actual header(3) call being the first or
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	      sent.

       Note

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       Note

	       If safe mode is enabled the uid of the script is added to the realm part of the WWW-Authenticate header	if  you  set  this  header
	      (used for HTTP Authentication).

       Note

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	      $host  = $_SERVER['HTTP_HOST'];
	      $uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\');
	      $extra = 'mypage.php';
	      header("Location: http://$host$uri/$extra");
	      exit;
	      ?>

       Note

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	      stant.

SEE ALSO

       headers_sent(3), setcookie(3), http_response_code(3),  The section on HTTP authentication.

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