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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LEARN ABOUT BSD

indxbib

LOOKBIB(1)						      General Commands Manual							LOOKBIB(1)

NAME

       indxbib, lookbib - build inverted index for a bibliography, find references in a bibliography

SYNOPSIS

       indxbib database  ...
       lookbib [ -n ] database

DESCRIPTION

       Indxbib	makes  an  inverted index to the named databases (or files) for use by lookbib(1) and refer(1).  These files contain bibliographic
       references (or other kinds of information) separated by blank lines.

       A bibliographic reference is a set of lines, constituting fields of bibliographic information.  Each field starts on a line beginning  with
       a  ``%'',  followed  by	a key-letter, then a blank, and finally the contents of the field, which may continue until the next line starting
       with ``%''.

       Indxbib is a shell script that calls /usr/libexec/refer/mkey and /usr/libexec/refer/inv.  The first program, mkey,  truncates  words  to  6
       characters,  and  maps upper case to lower case.  It also discards words shorter than 3 characters, words among the 100 most common English
       words, and numbers (dates) < 1900 or > 2000.  These parameters can be changed; see page 4 of the Refer document by Mike Lesk.   The  second
       program, inv, creates an entry file (.ia), a posting file (.ib), and a tag file (.ic), all in the working directory.

       Lookbib uses an inverted index made by indxbib to find sets of bibliographic references.  It reads keywords typed after the ``>'' prompt on
       the terminal, and retrieves records containing all these keywords.  If nothing matches, nothing is returned except another ``>'' prompt.

       Lookbib will ask if you need instructions, and will print some brief information if you reply ``y''.  The ``-n'' flag turns off the  prompt
       for instructions.

       It  is  possible  to search multiple databases, as long as they have a common index made by indxbib.  In that case, only the first argument
       given to indxbib is specified to lookbib.

       If lookbib does not find the index files (the .i[abc] files), it looks for a reference file with the same name as the argument, without the
       suffixes.   It  creates	a  file  with a '.ig' suffix, suitable for use with fgrep.  It then uses this fgrep file to find references.  This
       method is simpler to use, but the .ig file is slower to use than the .i[abc] files, and does not allow the use of multiple reference files.

FILES

       x.ia, x.ib, x.ic, where x is the first argument, or if these are not present, then x.ig, x

SEE ALSO

       refer(1), addbib(1), sortbib(1), roffbib(1), lookbib(1)

BUGS

       Probably all dates should be indexed, since many disciplines refer to literature written in the 1800s or earlier.

4.2 Berkeley Distribution					 October 22, 1996							LOOKBIB(1)