HTML Parser

Anon

Is there an HTML parser for PHP similar to the XML expat parser ?? I would like to process HTML documents and the XML parser doesnt cut it due to its inability to accept unquoted attribute values and poor error recovery. However, escaping to routines when processing tags is what I would like to do.

Any help much appreciated, cheers David.

Anon

Hey Carl, such things certainly exist. I guess they have not yet been integrated with PHP ... something that has surprised me. But James Clark also has the HTML equivalent of the XLM parser integrated already.

Regards, David.

Anon

James Clark is the expat libary maintainer
thought it was http://www.xml.com/expat

any parsers found would be appreciated

Anon

Hi,

I needed one quickly so I made one myself (after an example of an C parser though 🙂)
It does not do everyhting yet you asked for,
but probably you can change the code yourself, to comply to your needs. I will still make updates to it though as I am going along.

You find it under: Algorithms

Anon

http://php.resourceindex.com/detail/00880.html

http://anton.concord.ru/

http://www.zend.com/search_code_author.php?author=xath

marcio

Anon

I modified one of the abovementioned scripts to do something similar. I am still working on getting the bugs out, but here's what I have so far.

<?php

#$argv[1]=$HTTP_GET_VARS["fname"];
$argv[1]="test1.html";
$Agv[1]="https://www.omnistep.com/~recompiler/Work/HTML%20Validate/test1.html";
/
if ($argc < 2)
{
print "argv[1] should be the name of the file you want to parse.\n";
print "Argv[1] can be a valid URL\n";
exit(0);
}
/

$array = file($argv[1]);
$array_size = count($array);

$open_tables = 0; #tables declared
$close_tables = 0; #tables closed
$open_links = 0; #links opened
$close_links = 0; #links_closed
$open_bld = 0; #open bold tags
$close_bld = 0; #close bold tags
$open_itl = 0; #open italic tags
$close_itl = 0; #close italic tags
$open_ttl = 0; #open title tags
$close_ttl = 0; #close title tags
$open_hdr = 0; #open header tags
$close_hdr = 0; #close header tags
$open_big = 0; #open big tags
$close_big = 0; #close big tags
$open_p = 0; #open paragraph tags
$close_p = 0; #close paragraph tags

#--------------Check Tables-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('<table',strtolower($val)))
{
$open_tables++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('</table>',strtolower($val)))
{
$deep--;
}
if (eregi('</table>',strtolower($val)))
$close_tables++;
}

print "The total number of open table tags is $open_tables \n";
print "The total number of close table tags is $close_tables \n";
if ($close_tables != $open_tables)
print "Warning: The number of open table tags does not equal the number of close tables tags. Make sure you check your code! \n\n";
print "The max depth of imbeded tables is $max\n ";

#--------------Check Links-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('<a href',strtolower($val)))
{
$open_links++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('</a>',strtolower($val)))
{
$deep--;
}
if (eregi('</a>',strtolower($val)))
$close_links++;
}

print "The total number of open link tags is $open_links \n";
print "The total number of close link tags is $close_links \n";
if ($close_links != $open_links)
print "Warning: The number of open link tags does not equal the number of close link tags. Make sure you check your code! \n\n";
#print "The max depth of imbeded links is $max \n";
print " \n";

#--------------Check Bold-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('',strtolower($val)))
{
$open_bld++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('',strtolower($val)))
{
$deep--;
}
if (eregi('',strtolower($val)))
$close_bld++;
}

print "The total number of open bold tags is $open_bld \n";
print "The total number of close bold tags is $close_bld \n";
if ($close_bld != $open_bld)
print "Warning: The number of open link tags does not equal the number of close link tags. Make sure you check your code! \n\n";
#print "The max depth of imbeded bold tags is $max \n";
print " \n";

#--------------Check Italics-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('',strtolower($val)))
{
$open_itl++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('',strtolower($val)))
{
$deep--;
}
if (eregi('',strtolower($val)))
$close_itl++;
}

print "The total number of open italics tags is $open_itl \n";
print "The total number of close italics tags is $close_itl \n";
if ($close_itl != $open_itl)
print "Warning: The number of open italics tags does not equal the number of close italics tags. Make sure you check your code! \n\n";
#print "The max depth of imbeded italics is $max \n";
print " \n";

#--------------Check Title-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('<title',strtolower($val)))
{
$open_ttl++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('</title>',strtolower($val)))
{
$deep--;
}
if (eregi('</title>',strtolower($val)))
$close_ttl++;
}

print "The total number of open title tags is $open_ttl \n";
print "The total number of close title tags is $close_ttl \n";
if ($close_ttl != $open_ttl)
print "Warning: The number of open title tags does not equal the number of close italics tags. Make sure you check your code! \n\n";
#print "The max depth of imbeded title is $max \n";
print " \n";

#--------------Check Header-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('<head',strtolower($val)))
{
$open_hdr++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('</head>',strtolower($val)))
{
$deep--;
}
if (eregi('</head>',strtolower($val)))
$close_hdr++;
}

print "The total number of open header tags is $open_hdr \n";
print "The total number of close header tags is $close_hdr \n";
if ($close_hdr != $open_hdr)
print "Warning: The number of open header tags does not equal the number of close italics tags. Make sure you check your code! \n\n";
#print "The max depth of imbeded italics is $max \n";
print " \n";

#--------------Check Big-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('<big',strtolower($val)))
{
$open_big++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('</big>',strtolower($val)))
{
$deep--;
}
if (eregi('</big>',strtolower($val)))
$close_big++;
}

print "The total number of open big tags is $open_big \n";
print "The total number of close big tags is $close_big \n";
if ($close_big != $open_big)
print "Warning: The number of open big tags does not equal the number of close italics tags. Make sure you check your code! \n\n";
print "The max depth of imbeded big is $max \n";

#--------------Check Paragraph-------------------------
$max = 0;
$deep = 0;
while(list($key, $val) = each($array))
{
if (eregi('',strtolower($val)))
{
$open_p++;
$deep++;
if ($deep > $max)
$max = $deep;
}
else if (eregi('',strtolower($val)))
{
$deep--;
}
if (eregi('',strtolower($val)))
$close_big++;
}

print "The total number of open paragraph tags is $open_p \n";
print "The total number of close paragraph tags is $close_p \n";
if ($close_p != $open_p)
print "Warning: The number of open paragraph tags does not equal the number of close paragraph tags. Make sure you check your code! \n\n";
print "The max depth of imbeded big is $max \n";

abhanja

Hi Vlad,

Interesting piece of code, instead of having close_big ,etc.. have open_big-- if the </ tag is detected, that way check the values of open_big :
if 0
then ok
else say error

jm2c
Arup