Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 237
  • Last Modified:

Parsing file - locate and return matching comment for line (regex possible)

I have a PHP file that I want to read and parse to capture into a variable the matching comment (should it exist) for a matching array element.

So if this define is in the file I am parsing and I search on the array key 'most_viewed' - I would like to determine if a comment exits on that line and if so what the comment is.

$fp = fopen($file);
$contents = fread($fp);
 .. now search for line matching array key and return comment if it exists.



$LANG_MGE01 = array (
    'featured_series'                   => 'Featured Series',
    'featured_episodes'                 => 'Featured Episodes',
    'featured'                          => 'Featured',
    'most_viewed'                       => 'xMost Viewed',            //  This is a test comment - most viewed
}
0
Bl248
Asked:
Bl248
  • 7
  • 3
1 Solution
 
RoonaanCommented:
$lines = file($file);
foreach($lines as $index => $line) {

  if(preg_match('#\'most_viewed\'\s*=>\s*\'[^\']*\'\s*[,]?\s*(//.*)$#i", trim($line), $match) && !empty($match[1])) {
     $most_viewed_comment = $match[1];
     echo $most_viewed;
  }
}
0
 
Bl248Author Commented:
Thanks again - that worked well.

Just had a few typos - missing quote and last echo was the wrong variable but they were easy to fix. That hard part for me was the regex - so thanks a bunch.

$lines = file($langfile);
$token = 'most_viewed';
foreach($lines as $index => $line) {
  if(preg_match('#\''.preg_quote($token).'\'\s*=>\s*\'[^\']*\'\s*[,]?\s*(//.*)$#i', trim($line), $match) && !empty($match[1])) {
     $most_viewed_comment = $match[1];
     echo $most_viewed_comment;
  }
}
0
 
Bl248Author Commented:
Thanks again for the very very quick solution!
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
Bl248Author Commented:
Have a related quesiton.

How would I get the array key for that matching line using preg_match?

I could use php explode or sub_str after getting the character positions but a preg_replace would appear to be cleaner.

    'most_recent'                       => 'Most Recent',            //  This is a test comment - most recent
0
 
RoonaanCommented:
the array key would be $token, wouldn't it be?
0
 
Bl248Author Commented:
True, in this case and should have added that the new scenario that I am testing is:

1) Scan the file looking for config elements with comments
2) Extract out the element key, value and comment.

I am looking at creating a small admin tool to allow users to maintain the language defines online.  Only defines with a comment and the comment is used to explain the variables use.

So that would introduce a change to your code extract, where now we search each line for a comment and then break it out into 3 parts.
0
 
RoonaanCommented:
$config = array();

$lines = file($langfile);
foreach($lines as $index => $line) {
  if(preg_match('#\'(\w+)\'\s*=>\s*\'([^\']*)\'\s*[,]?\s*(//.*)$#i', trim($line), $match) && !empty($match[1])) {
     $config[$match[1]] = array('value' => $match[2], 'comment' => $match[3]);
  }
}

print_r($config);
0
 
Bl248Author Commented:
That works very nicely -- going to work with that now :)
Thanks!
0
 
Bl248Author Commented:
One more tweak and please let me know if I should add more points to this question :)

if the line does not have a comment - so an else part of this:
 Return into #match parts 1 and 2 anyways. I will be driving an admin form and allowing the user to update this file.

Will there be an issue if the comment on the line has a quote as in
 // this ain't such a good comment

Thanks!
0
 
Bl248Author Commented:
Never mind -- I have found an alternative way to do what I wanted :)
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 7
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now