lynx: A Text Browser (Cont.)

The following interface demonstrates how to use lynx in PHP scripts. This interface searches the URL content for the lines containing the keyword.

☂You may need to create the empty file result.txt initially, and open it via 
     shell> chmod 777 result.txt
Otherwise, the file result.txt may not be written.

Displaying the Lines in the URL Content Containing the Keyword

  URL:
 

  A keyword:
 





     
  Password:                    
http://undcemcs01.und.edu/~wen.chen.hu/course/515/2/Lynx.php
view source
print?
01<?php
02 
03# Remove leading and trailing spacing.
04$URL     = trim( $_POST["URL"] );
05$keyword = trim( $_POST["keyword"] );
06 
07# For security, remove some Unix metacharacters.
08$meta    = array( ";", ">", ">>", ";", "*", "?", "&", "|" );
09$URL     = str_replace( $meta, "", $URL );
10$keyword = str_replace( $meta, "", $keyword );
11 
12if ( $_POST['act'] == "Search the URL content" ) {
13  header( "Content-type: text/plain" );
14  $cmd = "lynx -dump -source '" . $URL . "' > result.txt";
15  echo  ( $cmd . "\n\n" );
16  system( "chmod 777 result.txt ../2/" );
17  system( $cmd );
18  system( "chmod 755 result.txt ../2/" );
19  $cmd = "grep  $keyword result.txt";
20  echo  ( $cmd . "\n\n\n" );
21  system( $cmd );
22}
23 
24elseif ( $_POST["act"] == "Display the URL content" ) {
25  header( "Content-type: text/plain" );
26  $cmd = "lynx -dump -source '" . $URL . "' > result.txt";
27  echo  ( $cmd . "\n\n\n" );
28  system( "chmod 777 result.txt ../2/" );
29  system( $cmd );
30  system( "chmod 755 result.txt ../2/" );
31  system( "cat result.txt" );
32}
33 
34elseif ( $_POST["act"] == "Help" ) {
35  header( "Content-type: text/html" );
36  $file = fopen( "Help.html", "r" ) or
37    exit( "Unable to open file!" );
38  while ( !feof( $file ) )
39    echo  fgets( $file );
40  fclose( $file );
41}
42 
43else {
44  header( "Content-type: text/html" );
45  echo( "<html><body>" );
46  echo( "<h3>No such option: " . $_POST["act"] . "" );
47  echo( "</body></html>" );
48}
49 
50?>

The following PHP and Unix functions are used:


      “We must live together as brothers or perish together as fools.”    
      ― Martin Luther King Jr.