Compare files

[rockinaway]

What functions would I use if I want to compare the text from one file with another, and then hightlight the missing lines?

[cooldude832]

What sort of comparision are you talking? Line by Line,

like

Text1

a cat

a dog

a fish

 

Text 2

a snail

a cat

a turtle

 

 

Each of those is lines in the files in one case no lines match; matching A-A B-B C-C but in other way A of 1 matches B of 2 so which case is it?

[rockinaway]

The one where the whole text is search for a match.. so not in order..

[Wuhtzu]

So you mean letter by letter?

 

"A dog named Pluto" and "A dog named pluto" should be different?

[rockinaway]

Right I have 2 files..

File 1:

 

Hello

Test

File

Test2

 

File 2:

Test

Hello

File

 

When I compare them I want to check each of File 1s lines to see if they are in the other file.. so here all of File 1s and in File 2 except for Test2, so I want to highlight Test2.... understand? Is this possible?

[cooldude832]

file_get_content(), in_array()

 

Look em up.  export each file into a php array (by line i.e file_get_contents) 

Then say while(isset($file1[$i]){ //Compare to the array $file2}  if its match don't say anything else flag it

do that for file2

 

Then just output the files and if that part of the array is flagged highlight it, pretty straight forward

 

 

[rockinaway]

Can you please give an example of it? I kinda got confused  :-\

[cooldude832]

<?php
$file1 = "something.txt";
$file2 = "somethingelse.txt";
$file1 = file($file1);
$file2 = file($file2);


foreach($file1 as $key => $value){
if(!in_array($value,$file2)){
      $flag_1[$key] = "yes";
}
}

foreach($file2 as $key => $value){
if(!in_array($value,$file1)){
      $flag_2[$key] = "yes";
}
}

echo "<pre>".$file1."</pre>";
foreach($file1 as $key => $value){
if($flag_1[$key] == "yes"){
  echo "<b>".$value."</b>";
}
else{
  echo $value;
}
echo "<br/>";
}
echo "<br/><br/><br/>";
echo "<pre>".$file2."</pre>";
foreach($file2 as $key => $value){
if($flag_2[$key] == "yes"){
  echo "<b>".$value."</b>";
}
else{
  echo $value;
}
echo "<br/>";
}
?>

 

Pretty straightforward I think, I used file here because it will work better than file_get_content

[rockinaway]

Thanks.. would this work with text that is going to be shown in a textarea?

[cooldude832]

what do you mean shown in a text area?

[rockinaway]

Notice: Undefined offset: 3

 

I am getting lots of those errors.. and the results I want to be shown in a textarea...

[cooldude832]

Well tags don't show in a textbox so that won't work, if you can't follow the script, maybe you should read some tutorials on file handlers before attempting this.

[cooldude832]

<?php
$file1 = "something.txt";
$file2 = "somethingelse.txt";
$file1 = file($file1);
$file2 = file($file2);
$flag_1 = array();
$flag_2 = array();

$i = 0;
foreach($file1 as $value){
if(!in_array($value,$file2)){
      $flag_1[$i] = "yes";
}
$i++;
}
$i = 0;
foreach($file2 as $value){
if(!in_array($value,$file1)){
      $flag_2[$i] = "yes";
}
$i++;
}

$i = 0;
echo "<pre>".$file1."</pre>";
foreach($file1 as $value){
if($flag_1[$i] == "yes"){
	echo "<b>".$value."</b>";
}
else{
	echo $value;
}
$i++;
echo "<br/>";
}
echo "<br/><br/><br/>";
echo "<pre>".$file2."</pre>";
$i = 0;
foreach($file2 as $value){
if($flag_2[$i] == "yes"){
	echo "<b>".$value."</b>";
}
else{
	echo $value;
}
$i++;
echo "<br/>";
}
?>

 

Its because it won't index thus undefined indexing

[effigy]

There's also Unix's diff command.

[wildteen88]

cooldude wow! Your script is over complicated. Your code can be simplified down to just:

<?php

$file1_words = file('file1.txt');
$file2_words = file('file2.txt');

echo '<h2>File1 Words</h2>';

foreach($file1_words as $word)
{
    if(!in_array($word, $file2_words))
    {
        echo '<b>' . $word . "</b> (<i>match</i>)<br />\n";
    }
    else
    {
        echo $word . "<br />\n";
    }
}

echo '<h2>File2 Words</h2>';

foreach($file2_words as $word)
{
    if(!in_array($word, $file1_words))
    {
        echo '<b>' . $word . "</b> (<i>match</i>)<br />\n";
    }
    else
    {
        echo $word . "<br />\n";
    }
}

?>

[cooldude832]

yeah i realized that afterwards, but it does the same thing.  That unix idea sounds like an interesting one but requires exec()/a unix server

[cooldude832]

any idea if it works for you??