how can i change dynamically with php the width of a html div? -

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in website have faq page users can add questions , images 

<div class="faq container"> <div class="content">text text text</div> <div class="pic"><img></div>  </div>

if user adds text question div .class should 100% width if user adds text , img 2 divs should 50% each, next each other, how can it?

i'm going assume using database mysql. i'm going assume your database query returns following fields question, answer , _image_path_.

php

 $faq_html = '<div class="faq %s"><div class="content">q: %s<br>a: %s</div>%s</div>';  while ( $row = $result->fetch_object() ) :       $container_class = 'no-image';       $faq_img_html = '';       if ( ! empty( $row->image_path ) ) :            $container_class = 'has-image';            $faq_img_html = sprintf( '<div class="pic"><img src="%s" /></div>', $row->image_path );       endif;       $faqs .= sprintf( $faq_html, $container_class, $row->question, $row->answer,  $faq_img_html );  endwhile;   echo '<div class="faqs-container">' . $faqs . '</div>';

the output either have class of .no-image or .has-image on div wrapper each individual faq.

html

 <div class="faq no-image">       <div class="content">            q: text text text? <br>            a: text text text       </div>  </div>  <div class="faq has-image">       <div class="content">            q: text text text? <br>            a: text text text       </div>       <div class="pic"><img src="your-img.jpg" /></div>  </div>

once have sprinkle in little css.

 .no-image .content { width: 100%; }  .has-image .content,  .has-image .pic { width: 50%; }

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