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Asked: 2026-06-13T02:51:14+00:00

I have a user input form where the user is allowed to use HTML,

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I have a user input form where the user is allowed to use HTML, such as div, span, etc.

I would like to clean the input only if a user happens to put in a div with a style="width:" that is over the site width (which in this case is 800px.)

So I wanted to do a preg_replace searching for div style="width:"
only when width is greater than 800px.

I already have all other fixes in place for spans, div width="", etc. but the preg_replace on the div style="width:" where the width is only changed if it is greater than 800 (such as 1500px, 2000px, 801px) eludes me – I cannot get it to work.

Is there any way to achieve this?

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1 Answer

  1. Editorial Team

    The pony he comes…

    How would you go about handling something like width:140%? Or width: 600px; margin: 200px;? Or just an image with no defined width but an intrinsic width of over 800px?

    It’s far easier to just put the user-supplied content in a wrapper:

    <div style="width: 800px; overflow: hidden;">USER CONTENT HERE</div>
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