Fix ampersamp in syntaxhighlighter

Latiful Hayat

This can be done directly from the webinterface. Just go to Plugins -> Plugin Editor -> select the Plugin SyntaxHighlighter Evolved -> add the snippet to the end

/**
 * Filter to fix issue with & in SyntaxHighlighter Evolved plugin.
 *
 * @param string $code Code to format.
 * @param array $atts Attributes.
 * @param string $tag Tag.
 *
 * @return string
 */
function kagg_syntaxhighlighter_precode( $code, $atts, $tag ) {
    if ( 'code' === $tag ) {
        $code = wp_specialchars_decode( $code );
    }
    return $code;
}
add_filter( 'syntaxhighlighter_precode', 'kagg_syntaxhighlighter_precode', 10, 3 );

Sumber: https://nocin.eu/wordpress-syntaxhighlighter-ampersand-character/