Help with commenting 2 old files

[mikebyrne]

I've come accross two pieces of code that havn't any comments to tell me what they do and I cant remember either!

 

The code is

 

<?php
$fields=file('C:\Users\Mike\Desktop\5april.txt');
    foreach($fields as $i=>$field)
    {
       $field=str_replace('  ',',',$field);
       $field=str_replace(', ',',',$field);
       $fields[$i]=$field;
    }
    file_put_contents('C:\Users\Mike\Desktop\test.txt',implode("\r",$fields));
?>

 

And the other is

 

<?php
$lines = file('C:\Users\Mike\Desktop\test.txt');
$output = "";
foreach($lines as $line) {
   $line = str_replace("  ", " ", $line);
   $output .= $line;
}
file_put_contents( 'C:\Users\Mike\Desktop\final.csv', $output );
?>

 

Any help with what these do would be great!

 

 

[Mchl]

First one opens a file, reads it line by line, replacing all '  ' double spaces and commas followed by a single space with a comma. Then it saves the result to a new file.

 

Second replaces double spaces with single spaces.

[mikebyrne]

Thanks for your help!