Script remove multiple lines of html code

Question

I need to remove the same html code from many files. I tried to write an powershell script but its not working.

$htmlFiles = Get-ChildItem . *.html -rec
$old = '<form method="GET" action="http://localhost/index.php" name="head2">`r`n
                <input type="hidden" name="akcja" value="szukaj">`r`n
                <input type="hidden" name="ind" value="0" >`r`n
    `r`n
                <table border="0" cellpadding="1" cellspacing="0" style="margin-left:11px" >`r`n
                  `r`n
                            SOME MORE CODE
                 `r`n
                </table>`r`n
            `r`n
    </form>'

$new = ""

foreach ($file in $htmlFiles)
{
    (Get-Content $file.PSPath) |
    Foreach-Object { $_ -replace $old, $new} |
    Set-Content $file.PSPath
 }

I used so much `r`n because i have this same in html files. Maybe I need to do this with regex but regex for over 50 lines is too much for me. I think script is not working because whitespaces doesnt match. How to make it work?

My script runs but with no effect on a files ps. it needs to work on windows

Use Html Agility Pack for this kind of job: leeholmes.com/blog/2010/03/05/… — David Brabant
– David Brabant, Commented Dec 1, 2015 at 13:00

mjolinor · Accepted Answer · 2015-12-01 19:52:26Z

1

Agree with using the here-string, but you're doing a multi-line replace. this means you need to retrieve your HTML as a single, multi-line string and use a multi-line regex.

Does this work for your application?

$htmlFiles = Get-ChildItem . *.html -rec    

 $regex = 
 @'
(?ms)\s*<form method="GET" action="http://localhost/index.php" name="head2">\s*
.+?
\s*</form>\s*
'@
$new = ''

foreach ($file in $htmlFiles)
{
    (Get-Content $file.PSPath -raw) -replace $regex,$new  |
    Set-Content $file.PSPath
 }

answered Dec 1, 2015 at 19:52

mjolinor

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2 Comments

Kamil Over a year ago

there's no effect with this script ;/

Kamil Over a year ago

i'm writing a whole code fragment with \s* for white spaces and this didnt replace it. but when I use .* its working, why?

user2226112 · Accepted Answer · 2015-12-01 19:18:29Z

0

Try using a here-string instead of inserting escaped special characters which will probably mess up your regex matching.

@'
<form method="GET" action="http://localhost/index.php" name="head2">
    <input type="hidden" name="akcja" value="szukaj">
...
</form>
'@

Of course it will only work if the exact same formatting is used in each file.

answered Dec 1, 2015 at 19:18

user2226112

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