php 转换MHTML(mht)文件为html

本文介绍php解析mht文件(MHTML)，并转换成html文件的方法，欢迎大家的学习。

MHTML文件

MHTML文件称为聚合HTML文档、Web档案或单一文件网页。就是将网站的所有元素（包括文本和图形）都保存到单个文件中。

这种封装使您能将整个网站发布为单个内嵌MIME的聚合HTML文档(MHTML)文件，或将整个网站作为一个电子邮件或附件发送。

浏览器保存网页为MHTML文件

在 Chrome 地址栏中键入“chrome://flags”，回车，这是一个 Chrome 的功能配置页面，项目比较多，

通过 Ctrl+F 来搜索“mhtml”，找到“将网页另存为 MHTML”这一项，然后点击下方的“启用”。

PHP转换实现

 class mhtparse

{

    var $file = '';
    var $boundary = '';
    var $filedata = '';
    var $countparts = 1;
    var $log = '';

    function extract()
    {
        $this->read_filedata();
        $this->file_parts();

        return 1;
    }

    function set_file($p)
    {
        $this->file = $p;
    }

    function get_log()
    {
        return $this->log;
    }

    function file_parts()
    {
        $lines = explode("\n", substr($this->filedata, 0, 8192));
        foreach ($lines as $line) {
            $line = trim($line);
            if (strpos($line, '=') !== FALSE) {
                if (strpos($line, 'boundary', 0) !== FALSE) {
                    $range = $this->getrange($line, '"', '"', 0);
                    $this->boundary = "--" . $range ['range'];
                    $this->filedata = str_replace($line, '', $this->filedata);
                    break;
                }
            }
        }
        if ($this->boundary != '') {
            $this->filedata = explode($this->boundary, $this->filedata);
            unset ($this->filedata [0]);
            $this->filedata = array_values($this->filedata);
            $this->countparts = count($this->filedata);
        } else {
            $tmp = $this->filedata;
            $this->filedata = array(
                $tmp
            );
        }
    }

    function get_all_part_file()
    {
        return $this->filedata;
    }

    function get_part_to_file($i)
    {
        $line_data_start = 0;
        $encoding = '';
        $part_lines = explode("\n", ltrim($this->filedata [$i]));
        foreach ($part_lines as $line_id => $line) {
            $line = trim($line);
            if ($line == '') {
                if (trim($part_lines [0]) == '--')
                    return 1;
                $line_data_start = $line_id;
                break;
            }
            if (strpos($line, ':') !== FALSE) {
                $pos = strpos($line, ':');
                $k = strtolower(trim(substr($line, 0, $pos)));
                $v = trim(substr($line, $pos + 1, strlen($line)));
                if ($k == 'content-transfer-encoding') {
                    $encoding = $v;
                }
                if ($k == 'content-location') {
                    $location = $v;
                }
                if ($k == 'content-type') {
                    $contenttype = $v;
                }
            }
        }

        foreach ($part_lines as $line_id => $line) {
            if ($line_id <= $line_data_start)
                $part_lines [$line_id] = '';
        }

        $part_lines = implode('', $part_lines);
        if ($encoding == 'base64')
            $part_lines = base64_decode($part_lines);
        elseif ($encoding == 'quoted-printable')
            $part_lines = imap_qprint($part_lines);

        return $part_lines;
    }

    function read_filedata()
    {
        $handle = fopen($this->file, 'r');
        $this->filedata = fread($handle, filesize($this->file));
        fclose($handle);
    }

    function getrange(&$subject, $Beginmark_str = '{', $Endmark_str = '}', $Start_pos = 0)
    {
        if (empty ($Beginmark_str))
            $Beginmark_str = '{';
        $Beginmark_str_len = strlen($Beginmark_str);

        if (empty ($Endmark_str))
            $Endmark_str = '}';
        $Endmark_str_len = strlen($Endmark_str);

        /* $Start_pos_cache = 0; */
        do {
            /* !algus */
            if (!is_int($Begin_firstOccurence_pos))
                $Start_pos_cache = $Start_pos;

            /* ?algus-test */
            $Start_pos_cache = @strpos($subject, $Beginmark_str, $Start_pos_cache);

            /* this is possible start for range */
            if (is_int($Start_pos_cache)) {
                /* skip */
                $Start_pos_cache = ($Start_pos_cache + $Beginmark_str_len);
                /* test possible range start pos */
                if (is_int($Begin_firstOccurence_pos)) {
                    if ($Start_pos_cache < $range_end_pos)
                        $rangeClean = 0;
                    elseif ($Start_pos_cache > $range_end_pos)
                        $rangeClean = 1;
                }
                /* here it is */
                if (!is_int($Begin_firstOccurence_pos))
                    $Begin_firstOccurence_pos = $Start_pos_cache;
            } /* VIGA NR 0 ALGUST EI OLE */

            if (!is_int($Start_pos_cache)) {
                /* !algus */
                /* VIGA NR 1 ALGUSMARKI EI LEITUD : VIIMANE VOIMALIK ALGUS */
                if (is_int($Begin_firstOccurence_pos) and ($Start_pos_cache < $range_end_pos))
                    $rangeClean = 1;
                else
                    return false;
            }
            if (is_int($Begin_firstOccurence_pos) and ($rangeClean != 1)) {
                if (!is_int($End_pos_cache))
                    $End_sequel_pos = $Begin_firstOccurence_pos;

                $End_pos_cache = strpos($subject, $Endmark_str, $End_sequel_pos);

                /* ok */
                if (is_int($End_pos_cache) and ($rangeClean != 1)) {
                    $range_current_lenght = ($End_pos_cache - $Begin_firstOccurence_pos);
                    $End_sequel_pos = ($End_pos_cache + $Endmark_str_len);
                    $range_end_pos = $End_pos_cache;
                }
                /* VIGA NR 2 LOPPU EI LEITUD */
                if (!is_int($End_pos_cache))
                    if ($End_pos_cache == false)
                        return false;
            }
        } while ($rangeClean < 1);

        if (is_int($Begin_firstOccurence_pos) and is_int($range_current_lenght))
            $Range = substr($subject, $Begin_firstOccurence_pos, $range_current_lenght);
        else
            return false;

        return array(
            'range' => $Range,
            'begin' => $Begin_firstOccurence_pos,
            'end' => $End_sequel_pos
        );
    }
}

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