How to parse mht files into html using php

This article mainly introduces the method of converting PHP to parse mht files into HTML. Interested friends can refer to it. I hope it will be helpful to everyone.

php parses the mht file. When you open it with an editor, you can see the base64 encoding. Therefore, mht can be converted into html.

<?php

/**
 * 针对Mht格式的文件进行解析
* 使用例子:
* 
* function mhtmlParseBody($filename) {

	if (file_exists ( $filename )) {
		if (is_dir ( $filename )) return false;
		
		$filename = strtolower ( $filename );
		if (strpos ( $filename, &#39;.mht&#39;, 1 ) == FALSE) return false;
			
		
		$o_mhtml = new mhtml ();
		$o_mhtml->set_file ( $filename );
		$o_mhtml->extract ();
		return $o_mhtml->get_part_to_file(0);

	}
	return null;
}

function mhtmlParseAll($filename) {

	if (file_exists ( $filename )) {
		if (is_dir ( $filename )) return false;

		$filename = strtolower ( $filename );
		if (strpos ( $filename, &#39;.mht&#39;, 1 ) == FALSE) return false;
			

		$o_mhtml = new mhtml ();
		$o_mhtml->set_file ( $filename );
		$o_mhtml->extract ();
		return $o_mhtml->get_all_part_file();

	}
	return null;
}
*/

class mhtparse {

	var $file = &#39;&#39;;
	var $boundary = &#39;&#39;;
	var $filedata = &#39;&#39;;
	var $countparts = 1;
	var $log = &#39;&#39;;
	
	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, &#39;=&#39; ) !== FALSE) {
				if (strpos ( $line, &#39;boundary&#39;, 0 ) !== FALSE) {
					$range = $this->getrange ( $line, &#39;"&#39;, &#39;"&#39;, 0 );
					$this->boundary = "--" . $range [&#39;range&#39;];
					$this->filedata = str_replace ( $line, &#39;&#39;, $this->filedata );
					break;
				}
			}
		}
		if ($this->boundary != &#39;&#39;) {
			$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 = &#39;&#39;;
		$part_lines = explode ( "\n", ltrim ( $this->filedata [$i] ) );
		foreach ( $part_lines as $line_id => $line ) {
			$line = trim ( $line );
			if ($line == &#39;&#39;) {
				if (trim ( $part_lines [0] ) == &#39;--&#39;)
					return 1;
				$line_data_start = $line_id;
				break;
			}
			if (strpos ( $line, &#39;:&#39; ) !== FALSE) {
				$pos = strpos ( $line, &#39;:&#39; );
				$k = strtolower ( trim ( substr ( $line, 0, $pos ) ) );
				$v = trim ( substr ( $line, $pos + 1, strlen ( $line ) ) );
				if ($k == &#39;content-transfer-encoding&#39;) {
					$encoding = $v;
				}
				if ($k == &#39;content-location&#39;) {
					$location = $v;
				}
				if ($k == &#39;content-type&#39;) {
					$contenttype = $v;
				}
			}
		}
		
		foreach ( $part_lines as $line_id => $line ) {
			if ($line_id <= $line_data_start)
				$part_lines [$line_id] = &#39;&#39;;
		}
		
		$part_lines = implode ( &#39;&#39;, $part_lines );
		if ($encoding == &#39;base64&#39;)
			$part_lines = base64_decode ( $part_lines );
		elseif ($encoding == &#39;quoted-printable&#39;)
			$part_lines = imap_qprint ( $part_lines );
		
		return $part_lines;
	}
	
	function read_filedata() {
		$handle = fopen ( $this->file, &#39;r&#39; );
		$this->filedata = fread ( $handle, filesize ( $this->file ) );
		fclose ( $handle );
	}
	
	function getrange(&$subject, $Beginmark_str = &#39;{&#39;, $Endmark_str = &#39;}&#39;, $Start_pos = 0) {
		/*
		 * $str="sssss { x { xx } {xx{xx } x} x} sssss"; $range=string::getRange($str,&#39;{&#39;,&#39;}&#39;,0); echo $range[&#39;range&#39;]; //tulem: " x { xx } {xx{xx } x} x" echo $range[&#39;behin&#39;]; //tulem: 6 echo $range[&#39;end&#39;]; //tulem: 30 (&#39; &#39;) -- l5pumärgist järgnev out: array(&#39;range&#39;=>$Range,&#39;begin&#39;=>$Begin_firstOccurence_pos,&#39;end&#39;=>$End_sequel_pos) | false v1.1 2004-2006,Uku-Kaarel J5esaar,ukjoesaar@hot.ee,http://www.hot.ee/ukjoesaar,+3725110693
		 */
		if (empty ( $Beginmark_str ))
			$Beginmark_str = &#39;{&#39;;
		$Beginmark_str_len = strlen ( $Beginmark_str );
		
		if (empty ( $Endmark_str ))
			$Endmark_str = &#39;}&#39;;
		$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 (
				&#39;range&#39; => $Range,
				&#39;begin&#39; => $Begin_firstOccurence_pos,
				&#39;end&#39; => $End_sequel_pos 
		);
	} // end getrange()
} // class
?>

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