override ContentTag.php

<?php
/**
 * @author Jegtheme
 */

namespace JNews;

/**
 * Class Tree Node
 */
Class ContentTag {
    /**
     * @var TreeNode
     */
    private $pointer;
    private $root;
    private static $content;
    private $self_closing = array( 'img', 'embed', 'area', 'base', 'br', 'col', 'command', 'hr', 'input', 'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr' );

    public function __construct( $content ) {
        self::$content = $content;
        $this->populate_tag();
    }

    public function find( $tag, $number, $end=true ) {
        if ( is_object( $this->pointer ) && is_array( $this->pointer->child ) ) {
            foreach ( $this->pointer->child as $child ) {
                if ( $child->tag === $tag ) {
                    $number --;
                }

                if ( $number === 0 ) {
                    return $child->end;
                }
            }
            if ( $end && is_object( end( $this->pointer->child ) ) ) {
                return end( $this->pointer->child )->end;
            }
            return 0;
        }
    }

    public function total( $tag ) {
        $number = 0;

        if ( is_object( $this->pointer ) && is_array( $this->pointer->child ) ) {
            foreach ( $this->pointer->child as $child ) {
                if ( $child->tag === $tag ) {
                    $number ++;
                }
            }
        }

        return $number;
    }

    protected function populate_tag() {
        $this->pointer = new TreeNode();
        $this->root    = $this->pointer;

        preg_match_all( '/<[^>]*>/im', self::$content, $matches, PREG_OFFSET_CAPTURE );

        foreach ( $matches[0] as $key => $match ) {
            $tag = $this->get_tag( $match[0] );
            if ( ! empty( $tag ) ) {
                if ( ! $this->is_closed_tag( $match[0] ) ) {
                    $this->register_tag( $tag, $match[1] );
                } else {
                    $this->reset_tag( $match[1] );
                }
            }
        }
    }

    public static function get_content() {
        return self::$content;
    }

    protected function is_closed_tag( $tag ) {
        return substr( $tag, 0, 2 ) === '</';
    }

    protected function get_tag( $html ) {
        $html = preg_replace("/<!--.*?-->/ms","",$html);
        if ( ! empty( $html ) ) {
            preg_match( '/<\/?([^\s^>]+)/', $html, $tag );

            return $tag[1];
        }
        return '';
    }

    protected function register_tag( $tag, $start ) {
        $this->pointer = $this->pointer === null ? $this->root : $this->pointer;
        $this->pointer = $this->pointer->create_child( $tag, $start );

        // Reset tag if there is a self colsing tag html
        if ( in_array( $tag, $this->self_closing ) ) {
            $this->reset_tag( $start );
        }
    }

    protected function reset_tag( $end ) {
        $this->pointer = $this->pointer === null ? $this->root : $this->pointer;
        $this->pointer = $this->pointer->end_child( $end );
    }
}