Question 40924 in PHP Question posted in
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Regex: Exclude first line with brackets – PHP

I am trying to strip all HTML brackets, except anything from the first line of code using this REGEX

(?ms)(?!A)<[^>]*>

It’s very close to working, unfortunately it strips the closing brackets from the first line as well. The example I am working with is:

<div id="uniquename">https://www.example.com?item_id=10302</div>
<div id="uniqname2">
<div id="uniqname3">
<h2 id="uniqnametitle">Title</h2>
<div class="row">
<div class="large-3 columns">Example:</div>
<div class="large-9 columns"><b>Sub example</b></div>
</div>
<div class="row">
<div class="large-3 columns">Additional</div>

The current REGEX removes all other HTML tags and excludes the first line with the exception of the trailing div close tag and outputs the following:

<div id="uniquename">https://www.example.com?item_id=10302
Title
Example:
Sub example
Additional

If there is a better way to perform the REGEX than excluding the first line I am open to suggestions. Skipping the first line seems to be the easiest way, however, I need the end bracket to stay intact.

What am I missing in my REGEX?

Tags:

3

Answers


  1. 0

    You should use an HTML parser in general…

    However, you can do:

    $ cat <(head -n 1 file) <(sed 1d file | sed -E 's/<[^>]*>//g; /^$/d')

    Or an awk:

    $ awk 'FNR==1 {print; next}
      {gsub(/<[^>]*>/,""); if ($0) print}' file

    Either prints:

    <div id="uniquename">https://www.example.com?item_id=10302</div>
Title
Example:
Sub example
Additional
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  2. 0

    You can try this
    (?ms)((?<firstline>A[^n]*)|(<[^>]*>))
    With substitution
    $firstline

    Playground for your example – https://regex101.com/r/ASItOP/3

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  3. 0

    UPDATE 1 : just realized it could be massively simplified

    gawk 'NR==!_ || (NF=NF)*/./' FS='<[^>]+>' OFS=

    mawk 'NR==!_ || (NF=NF)*/./' FS='^(<[^>]+>)+|(<[/][^>]+>)+$' OFS=

     1  <div id="uniquename">https://www.example.com?item_id=10302</div>
 2  Title
 3  Example:
 4  Sub example
 5  Additional
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