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PHP PDF Parser: Installation process

The PDFParser is built on the basis of TCPDF parser. In this article we will discuss about the PHP parser installation process.

PDF Parser is an individual PHP files (library) which provides various tools to extract data from a PDF file. This file (library) is still under going development. So, users must expect BC breaks when using the master edition. The Parser package modifies nothing about the way we work with Views, but it will let us to use any pattern parser we want as an alternative of PHP. The package includes many drivers for parsers like Mustache, Markdown, Twig, Smarty etc.Which parser is used is selected by the file extension of the view file. Common views are extended .php and will use PHP to parse the pattern, for these the .php extension may also be excluded. Others have their own particular extension, viz, foo.mustache will use the Mustache driver and foo.tpl will use the Dwoo driver (predictable extensions can be changed in config).

Installation Process

Now I will discuss about the installation details

Using Composer:

We can add PDFParser tothe composer

Listing 1: Sample showing PDFParser

  {
      "require": {
          "smalot/pdfparser": "*"
      }
  }
  

The composer will download the collection by running the command:

  1. $ composer update smalot/pdfparser

As standalone files (library)

At first, the file (library) needs to be downloaded from Github by choosing a specific release or directly the master.

Once done, we have to unzip it and run the following command line using composer.

  1. $ composer update

This command will download any dependencies (Atoum library) and create the 'autoload.php' file.

Now we have to build a new file with this content, in the same folder:

Listing2: Showing composer autoloader

  <?php 
  // Include 'Composer' autoloader.
  include 'vendor/autoload.php'; 
  // Code
  // ... 
  ?>
  

Unit tests with Atoum

We have to Run Atoum unit tests (with code coverage - if xdebug installed) :

  1. $ vendor/bin/atoum -d vendor/smalot/pdfparser/src/Smalot/PdfParser/Tests/

Once this command is ended, the folder "coverage/" will include html pages with a code reporting summary.

Use

The following sample will parse the entire pdf file and take out text from each page.

Listing3: Sample showing parsing

  <?php 
  // Include Composer autoloader if not already done.
  include 'vendor/autoload.php';
   
  // Parse pdf file and build necessary objects.
  $parser = new \Smalot\PdfParser\Parser();
  $pdf    = $parser->parseFile(note.pdf'); 
  $text = $pdf->getText();
  echo $text; 
  ?>
  

We can too extract text from each page or for a specific page.

  <?php 
  // Include Composer autoloader if not already done.
  include 'vendor/autoload.php'; 
  // Parse pdf file and build necessary objects.
  $parser = new \Smalot\PdfParser\Parser();
  $pdf    = $parser->parseFile('note.pdf'); 
  // Retrieve all pages from the pdf file.
  $pages  = $pdf->getPages(); 
  // Loop over each page to extract text.
  foreach ($pages as $page) {
      echo $page->getText();
  } 
  ?>
  

Given below is a sample code to extract metadata from article (Author, Creator, CreationDate, ...).

  <?php 
  // Include Composer autoloader if not already done.
  include 'vendor/autoload.php'; 
  // Parse pdf file and build necessary objects.
  $parser = new \Smalot\PdfParser\Parser();
  $pdf    = $parser->parseFile('note.pdf'); 
  // Retrieve all details from the pdf file.
  $details  = $pdf->getDetails(); 
  // Loop over each property to extract values (string or array).
  foreach ($details as $property => $values) {
      if (is_array($values)) {
          $values = implode(', ', $values);
      }
      echo $property . ' => ' . $values . "\n";
  } 
  ?>
  

PHP_Parser is a tool which analyses source code and it is based around a authentic Parser
generated by PHP_ParserGenerator. It uses the identical EBNF source that PHP
uses to parse itself, customized for Lemon parser format. It is therefore as strong
as PHP itself.

This edition has full support for parsing out every re-usable component in PHP as of PHP 6:

  • classes
  • abstract classes
  • inheritance, implements
  • interfaces
  • methods
  • any thrown or caught exception
  • static variables declared
  • global and superglobal ($_GET) variables used
  • and declared

  • any class names used in any circumstance
  • any functions called
  • any $this->var or class::$var
  • any $this->method or class::method() or class::$method()
  • variables
  • constants
  • functions (same information as methods minus $this->/self::/parent:: information)
  • defines
  • global variables (with help of PHP_Parser_DocblockParser)
  • superglobal variables used in overall code
  • include statements

It is feasible to modify the output to return an array,objects of user-defined classes, and can as well be modified to bring out each element as the way it is parsed, which permit shooks into parsing to grab information.

The ParserFunctions extension enhances the wiki text parser with constructive functions, mainly associated to logic and handles string. Since MediaWiki 1.15, ParserFunctions has included most (but not all) of the functions from the StringFunctions extension, which may be enabled or disabled.

Installation

  1. We have to download the files from Git or download a snapshot. Then we have to select the version that matches the version of MediaWiki.
  2. Next we have to make a directory ParserFunctions in our $IP/extensions directory.
  3. Then we extract the files to this extensions/ParserFunctions directory.
  4. Add to the bottom of restricted situation.php:
  5. require_once "$IP/extensions/ParserFunctions/ParserFunctions.php";
  6. If we want to use the integrated string function functionality, we have to add the following just after that line
  7. $wgPFEnableStringFunctions = true;
  8. Installation can now be verified through Special: Version of our wiki.
  9. PHP Simple HTML DOM Parser
  10. PHP Simple HTML DOM Parser is a dream utility for developers that work with both PHP and the DOM because. In the example below we have illustrated few sample uses of PHP Simple HTML DOM Parser:

Listing 4: Sample showing DOM parser

  // Include the library
include('simple_html_dom.php'); 
// Retrieve the DOM from a given URL
$html = file_get_html('http://davidwalsh.name/');
// Find all "A" tags and print their hrefs
foreach($html->find('a') as $e) 
    echo $e->href . '<br>';
 
// Retrieve all images and print their SRCs
foreach($html->find('img') as $e)
    echo $e->src . '<br>';
// Find all images, print their text with the "<>" included
foreach($html->find('img') as $e)
    echo $e->outertext . '<br>';
 
// Find the DIV tag with an id of "myId"
foreach($html->find('div#myId') as $e)
    echo $e->innertext . '<br>';
 
// Find all SPAN tags that have a class of "myClass"
foreach($html->find('span.myClass') as $e)
    echo $e->outertext . '<br>';
 
// Find all TD tags with "align=center"
foreach($html->find('td[align=center]') as $e)
    echo $e->innertext . '<br>';
    
// Extract all text from a given cell
echo $html->find('td[align="center"]', 1)->plaintext.'<br><hr>';
  

Parse down

Better Markdown parser for PHP.

[ demo ] [ tests ]

Features

  • Fast
  • Consistent
  • GitHub Flavored
  • Friendly to international input
  • Tested in PHP 5.2,5.3,5.4,5.5 and hhvm.

Installation

Include Parsedown.php or set up(install) the composer package.

Example

$text = 'Hello _Parsedown_!';
  $result = Parsedown::instance()->parse($text);
  echo $result; # prints: <p>Hello <em>Parsedown</em>!</p>

Installation

The Parser package is integrated in the Fuel download. To use it we must first allow it by adding it to our configuration:

  'always_load' => array(
      'packages' => array(
          'parser',
      ),
  ),
  

While a lot of drivers are incorporated, most of the files(libraries) are not incorporated in the list. Only Mustache and Markdown are incorporated in the vendor directory of the package and work out of the box.

Mustache, Twig, MtHaml and Smarty should be installed via Composer. ":

  {
      "require": {
          "mustache/mustache" : "*",
          "smarty/smarty" : "*",
          "twig/twig" : "*",
          "mthaml/mthaml": "*"
      }
  }
  

Runtime Configuration

All drivers have a parser() method that will permit us to access the current Parser object. This is a principle and might be different on 3rd party drivers.

  // The cache is cleared for a specific Smarty template
  $view = View::forge('example.smart');
  $view->parser()->clearCache('example.smart');
   
  // Example static usage
  View_Smarty::parser()->clearCache('example.smart');
  

PHParser - a PHP-Parser for ZOPE

PHParser is a ZOPE-Product supported heavily on the DTML-Document-Class. A PHParser will provide you uniqueness of a DTML-Document and all the uniqueness of PHP. This means that we can combine DTML into your PHP-Code.

PHParser is a genuine subclass of the DTML-Document-class. So we can utilize FTP, Cache-Managers, WebDav etc on a PHParser. To affirm it clearly: PHParser only alters the __caller__-function from the DTML-Document-class; the rest is obtained from the DTML-Document-class.

PHParser works as a postprocessor: After rendering all DTML-tags in our article, PHParser will pipe the end result through an external PHP-Interpreter. PHParser propels the QUERY_STRING via the environment and sets the $PHP_SELF-variable, which isn't set usually if we invoke PHP as an interpreter. As a consequence most simple scripts will carry out without any modification. The header and body of the returned result will be decoded. We can use PHP-'Header'-functions. This is useful to forward {Header} and the construction of images.

The php codes are interpreted by the "php" execution file. If we have construct PHP as an Apache Module, the file doesn't exist. In other words: You have to compile/install PHP as a Command-Line-Intepreter and make sure that ZOPE can execute it.

If PHParser won't work on Windows, we have to (un)comment the PHPath-Variable at the beginning of PHParser.py.

Converting Parsers Written for MoinMoin 1.6 and older versions

Due to alteration in the MoinMoin structural design, parsers written for editions other than (older) 1.7 might have to go through some alteration in order to work with current editions of MoinMoin

For uncomplicated parsers, mostly the ones performing straightforward syntax highlighting, it’s only a subject of replacing.

Toggle line numbers

  1. from MoinMoin.util.ParserBase import ParserBase
  2. Dependencies = []

With Toggle line numbers

  1. from MoinMoin.parser._ParserBase import ParserBase
  2. Dependencies = ['user'] # the "Toggle line numbers link" depends on user's language

At the commencement of the parser foundation sleeve. Start again Moin Moin and the parser ought to toil at the present.

Installation Instructions

For generic installation instructions, we have to go through the ParserMarket/InstallingParsers, else we have to go through the specific parser's page.

Parser

Author

Short Description

Designed For 1

/68hc11

JureVrscaj

The 68hc11 parser allows us to have 68hc11 ASM code submitted nicely inside Moin's code blocks.

1.5

/AgelSrc

JonghyoukYun

The Agel parser allows us to have various different types of code submitted nicely inside Moin's code blocks.

1.5

/AgPics

Yun, Jonghyouk

The AgPics parser is another gallery parser for Moin.

1.5

/BarChart

ReimarBauer

The BarChart parser permits us to build BarCharts in pure CSS

1.5

/Bibtex

GuidoBerhoerster

The Bibtex parser allows us to have Bibtex code rendered nicely inside Moin's code blocks.

1.5

/Bibtex2

JunHu, AlexandreDuretLutz

The Bibtex2 parser allows us to have bibtex code rendered nicely inside Moin's code blocks.

1.5

/ClientXslt

Yoon, SangMin

The ClientXslt parser allows us to have XML formatted client side, eliminating the need for 4Suite.

1.5

/Diff

EmilioLopes

The Diff parser permits us to have diffs rendered nicely inside Moin's code blocks.

1.5

/FeedBack

ThomasGuettler

The FeedBack parser allows us to have a feedback form on your wiki, for guests to leave comments.

1.5

/Fortran90

ChmBerg

The Fortran90 parser allows us to have Fortran code rendered nicely inside Moin's code blocks.

1.5

/Frame

ReimarBauer

The Frame parser is used to align enclosed wiki markup or split wiki markup in boxes or just to draw a box around some wiki markup.

1.6, 1.5

/FreeMind

BenKavanagh

The FreeMind parser allows us to have FreeMind mind maps inside of Moin.

1.5

/Gallery2

ReimarBauer

The Gallery2 parser allows us to show photos inside Moin.

1.6, 1.5, 1.3

/Gobby

RadomirDopieralski

The Gobby parser allows us to have Gobby markup rendered nicely inside Moin's code blocks.

1.5

GraphViz

ZoranIsailovski

This extension provides generic access to the GraphViz Graph Visualization Toolset.

1.5

/HTML

DanielHorth

The HTML parser allows us to have HTML code rendered nicely inside Moin's code blocks.

1.5.7

/InlineSource

RaymondBennett

The InlineSource parser allows us to show C++ code from files on the harddrive in a Moin wiki.

1.5

/ImageMap

OliverSiemoneit

The ImageMap parser allows you to build clickable images inside Moin.

1.5

/JavaScript

C.K. Wong

The JavaScript parser allows us to have JavaScript code rendered nicely inside Moin's code blocks.

1.5

/KeyVal

MattCooper

The KeyVal parser allows us to create tables by using the format key:value.

1.5

/LiterateProgramming

OlegKobchenko

The LiterateProgramming parser allows you to have LiterateProgramming decelerations and cross links rendered nicely inside Moin's code blocks.

1.5

/Lsl

ThiloPfennig

The LSL parser allows us to have LSL code rendered nicely inside Moin's code blocks.

1.5

/Media4Moin

StefanMerten

The MediaWiki parser allows us to use MediaWiki syntax in place of normal Moin syntax in 1.5.

1.5

/Multiline

PaisaSeeluangsawat

The Multiline parser allows us to have line breaks in page source.

1.5.8

/MySQL

GouichiIisaka

The MySQL parser allows us to have MySQL code rendered nicely inside Moin's code blocks.

1.5

/Notes

BryanTsai

The Notes parser allows us to paste in from Lotus Notes.

1.5

/Ocaml

KubaNowak

The OCaml parser allows us to have OCaml code rendered nicely inside Moin's code blocks.

1.5

/OpenRoad

AnkeHeinrich

The OpenRoad parser allows us to have OpenROAD data rendered nicely inside Moin's code blocks.

1.5

/Perl

JohannesHoerburger

The Perl parser allows us to have Perl code rendered nicely inside Moin's code blocks.

1.5

/Pygments

GeorgBrandl

The Pygments parser allows us to have Python code formated nicely by using the Pygments parser.

1.5.8

/Raw

MSt

The Raw parser allows us to enter HTML directly, and have it output as is by Moin.

1.5

/Ruby

KubaNowak

The Ruby parser allows us to have Ruby code rendered nicely inside Moin's code blocks.

1.5

/SciLab

PierreMaréchal

The SciLab parser allows us to have Scilab code rendered nicely inside Moin's code blocks.

1.5

/Sctable

ReimarBauer

The sctable parser allows us to create spreadsheats inside of Moin by using sc syntax.

1.5

/Slchat

ThiloPfennig

The SLchat parser allows us to have Second Life chats formatted nicely inside Moin.

1.5

/Sstable

AndrewShewmaker

The SSTable parser allows us to create spreadsheets inside Moin's code blocks by using just Python.

1.5

/UmlSequence

PascalBauermeister

The UmlSequence parser allows us to create UML diagrams inside Moin.

1.5

/VisualBasic

The VisualBasic parser allows us to have VB code rendered nicely inside Moin's code blocks.

1.5

/WikiCWS

ChadSkeeters

The WikiCWS parser allows us to do almost the same as WikiSNL but deletes the spaces between lines.

1.5

/WikiCreole

RadomirDopieralski

The WikiCreole parser allows us to use Creole markup instead of or additionally to the standard Moin syntax.

Moin 1.6+ includes this parser.

1.5

/WikiSpaces

GregBell

The WikiSpace parser allows us to use wikispace style markup inside Moin.

1.5

Obsolete

Here we like to collect parsers which were replaced.

Parser

Author

Email

Designed for MoinMoin Release

Sample

latex

WkPark, BennySiegert, ReimarBauer

ReimarBauer

1.3

/ObsoleteLatexParser

!LaTeX Parser (previous version was a processor)
replaced by the new latexparser of JohannesBerg.

Unknown

Here are certain parsers that are in a state which is unknown.

Parser

Author / Email

short description

Designed for MoinMoin Release

Sample

MokuWiki

Armin Ronacher

Dokuwiki like parser

1.5

none

parser/pseudoXML

jbusse

mix up wiki markup, pseudoXML and well formed XML;
pipe the result to 4Suite.

1.5

see parser/pseudoXML

Conclusion:

We need to be careful about using Simple HTML DOM parser: memory leakage. Leaks can sluggish down any website, or even make it ineffectual for a few minutes. So, to check this, each object should be cleaned before loading a new one. It is not difficult to work with 2 or 3 objects at a time, but if we load many objects before clearing the earlier ones, it can be a problem. Simple HTML DOM parser is a very potent script which we can utilize to access HTML DOM through PHP.



Website: www.techalpine.com Have 16 years of experience as a technical architect and software consultant in enterprise application and product development. Have interest in new technology and innovation area along with technical...

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