search
Homephp教程php手册Html Parser Class

Html Parser Class

Jun 21, 2016 am 09:05 AM
gtnbspoutputparserthis

This is a HTML parser class, used to parse HTML and XML. One of the unique features of this class is that it supports the innerHTML property.

php

/**
 * HTML/XML Parser Class
 *
 * This is a helper class that is used to parse HTML and XML. A unique feature of this parsing class 
 * is the fact that it includes support for innerHTML (which isn't easy to do).
 *
 * @author Dennis Pallett
 * @copyright Dennis Pallett 2006
 * @package HTML_Parser
 * @version 1.0
 */

// Helper Class
// To parse HTML/XML
Class HTML_Parser 
{
    
// Private properties
    
var $_parser
;
    var 
$_tags 
= array();
    var 
$_html
;
    var 
$output 
= array();
    var 
$strXmlData
;
    var 
$_level 0
;
    var 
$_outline
;
    var 
$_tagcount 
= array();
    var 
$xml_error false
;
    var 
$xml_error_code
;
    var 
$xml_error_string
;
    var 
$xml_error_line_number
;

    function 
get_html 
() {
        return 
$this->_html
;
    }

    function 
parse($strInputXML
) {
        
$this->output 
= array();

        
// Translate entities
        
$strInputXML $this->translate_entities($strInputXML
);

        
$this->_parser xml_parser_create 
();
        
xml_parser_set_option($this->_parserXML_OPTION_CASE_FOLDINGtrue
);
        
xml_set_object($this->_parser,$this
);
        
xml_set_element_handler($this->_parser"tagOpen""tagClosed"
);
          
        
xml_set_character_data_handler($this->_parser"tagData"
);
      
        
$this->strXmlData xml_parse($this->_parser,$strInputXML 
);

        if (!
$this->strXmlData
) {
            
$this->xml_error true
;
            
$this->xml_error_code xml_get_error_code($this->_parser
);
            
$this->xml_error_string xml_error_string(xml_get_error_code($this->_parser
));
            
$this->xml_error_line_number =  xml_get_current_line_number($this->_parser
);
            return 
false
;
        }

        return 
$this->output
;
    }


    function 
tagOpen($parser$name$attr
) {
        
// Increase level
        
$this->_level
++;

        
// Create tag:
        
$newtag $this->create_tag($name$attr
);

        
// Build tag
        
$tag = array("name"=>$name,"attr"=>$attr"level"=>$this->_level
);

        
// Add tag
        
array_push ($this->output$tag
);

        
// Add tag to this level
        
$this->_tags[$this->_level] = $tag
;

        
// Add to HTML
        
$this->_html .= $newtag
;

        
// Add to outline
        
$this->_outline .= $this->_level $newtag
;
    }

    function 
create_tag ($name$attr
) {
        
// Create tag:
        # Begin with name
        
$tag 'strtolower($name) . ' ';

        
# Create attribute list
        
foreach ($attr as $key=>$val
) {
            
$tag .= strtolower($key) . '="' htmlentities($val) . '" '
;
        }

        
# Finish tag
        
$tag trim($tag
);
        
        switch(
strtolower($name
)) {
            case 
'br'
:
            case 
'input'
:
                
$tag .= ' /'
;
            break;
        }

        
$tag .= '>'
;

        return 
$tag
;
    }

    function 
tagData($parser$tagData
) {
        if(
trim($tagData
)) {
            if(isset(
$this->output[count($this->output)-1]['tagData'
])) {
                
$this->output[count($this->output)-1]['tagData'] .= $tagData
;
            } else {
                
$this->output[count($this->output)-1]['tagData'] = $tagData
;
            }
        }

        
$this->_html .= htmlentities($tagData
);
        
$this->_outline .= htmlentities($tagData
);
    }
  
    function 
tagClosed($parser$name
) {
        
// Add to HTML and outline
        
switch (strtolower($name
)) {
            case 
'br'
:
            case 
'input'
:
                break;
            default:
            
$this->_outline .= $this->_level '' strtolower($name) . '>'
;
            
$this->_html .= '' strtolower($name) . '>'
;
        }

        
// Get tag that belongs to this end
        
$tag $this->_tags[$this->_level
];
        
$tag $this->create_tag($tag['name'], $tag['attr'
]);

        
// Try to get innerHTML
        
$regex '%' preg_quote($this->_level $tag'%') . '(.*?)' preg_quote($this->_level '' strtolower($name) . '>''%') . '%is'
;
        
preg_match ($regex$this->_outline$matches
);

        
// Get innerHTML
        
if (isset($matches['1'
])) {
            
$innerhtml $matches['1'
];
        }
        
        
// Remove level identifiers
        
$this->_outline str_replace($this->_level $tag$tag$this->_outline
);
        
$this->_outline str_replace($this->_level '' strtolower($name) . '>''' strtolower($name) . '>'$this->_outline
);

        
// Add innerHTML
        
if (isset($innerhtml
)) {
            
$this->output[count($this->output)-1]['innerhtml'] = $innerhtml
;
        }

        
// Fix tree
        
$this->output[count($this->output)-2]['children'][] = $this->output[count($this->output)-1
];
        
array_pop($this->output
);

        
// Decrease level
        
$this->_level
--;
    }

    function 
translate_entities($xmlSource$reverse =FALSE
) {
        static 
$literal2NumericEntity
;
        
        if (empty(
$literal2NumericEntity
)) {
            
$transTbl get_html_translation_table(HTML_ENTITIES
);

            foreach (
$transTbl as $char => $entity
) {
                if (
strpos('&"'$char) !== FALSE
) continue;
                    
$literal2NumericEntity[$entity] = ''.ord($char).';'
;
                }
            }

            if (
$reverse
) {
                return 
strtr($xmlSourcearray_flip($literal2NumericEntity
));
            } else {
                return 
strtr($xmlSource$literal2NumericEntity
);
            }
      }
}

// To be used like this
$parser = new HTML_Parser
;
$output $parser->parse($html
);

print_r ($output
);

?>



Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),