Is there a way to use latex cite{reference} in wordpress?

1 comment

1. Outside of using other plugins, as mentioned in the comments, you would need to essentially parse the LaTeX yourself by filtering the_content.

   Here is a very rough example of how you might capture and transform the post content to parse a bibliography. Please note that I don’t know LaTeX, and this is just string parsing. Also, I’m tracking citations and references in the arrays $citations and $citation_refs in case that is useful to you, but it may not be.

   #add_filter( 'the_content', 'my_latex_citation_filter' );
   
   function my_latex_citation_filter( $content ) {
       $lines = explode( "n", $content );
   
       $citation_refs = [];
       $citations     = [];
       $next_is_ref   = false;
       $next_ref      = '';
       $in_bib        = false;
   
       foreach ( $lines as $index => $line ) {
           preg_match( '/\cite{([^}]+)}/', $line, $matches );
   
           if ( ! empty( $matches[1] ) ) {
               $citation_refs[] = $matches[1];
               $next_ref        = "citation-{$matches[1]}";
               $lines[ $index ] = str_replace( $matches[0], sprintf( '<a href="#%1$s">%2$s</a>', $next_ref, $matches[1] ), $line );
           }
   
           if ( $next_is_ref && $next_ref ) {
               $lines[ $index ] = sprintf( '<span id="%s">' . $line . '</span>', $next_ref );
               $next_ref        = '';
               $next_is_ref     = false;
           }
   
           preg_match( '/\bibitem{([^}]+)}/', $line, $matches );
   
           if ( ! empty( $matches[1] ) ) {
               $citations[] = $matches[1];
               $next_is_ref = true;
               unset( $lines[ $index ] );
           }
       }
   
       return implode( "n", $lines );
   }
   
   
   $content = '
   [latexpage]
   Here is a citation cite{example}.
   
   begin{thebibliography}
   
   bibitem{example}
   Robert C. Merton, On the Pricing of Corporate Debt: The Risk Structure of Interest Rates. textit{Journal of Finance} 1974; textbf{2}:449–470.
   
   end{thebibliography}
   ';
   
   echo my_latex_citation_filter( $content );
   

   Uncomment the line at the top (#add_filter...) and remove the last line echo ... to use this as a filter on the_content, but the code as-is above can be run inside of a standalone PHP file to see how it works. The output of the above is:

   [latexpage]
   Here is a citation <a href="#citation-example">example</a>.
   
   begin{thebibliography}
   
   <span id="citation-example">Robert C. Merton, On the Pricing of Corporate Debt: The Risk Structure of Interest Rates. textit{Journal of Finance} 1974; textbf{2}:449–470.</span>
   
   end{thebibliography}
   

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