Searching text files

[rachelk]

I'm trying to search a text file which has lines like this:

 

first-sequence

second-sequence

sequence-sequence

 

I only want to search for the first word of every line though, so if I search for "sequence" I only wanted the 3rd line to be outputted, although the first two have "sequence" in them it's not the first word.. I'm wondering if this is possible at all, or would it be too difficult?

 

Thanks in advance.

[phpSensei]

Open the file using the FGETS function http://php.about.com/od/phpfunctions/g/fgets_php.htm

 

if you find the line you want, then explode '-', and get the first word from the array

[trq]

$f = fopen("file.txt", "r");
while ($scan = fscanf($f, "%s-%s\n")) {
  list ($item, $junk) = $scan;
  if ($item == 'sequence') {
    echo "found";
  }
}
fclose($handle);

 

[rachelk]

Thanks for the replies

 

I'm very much a newbie to this so I don't know the basic steps I should be taking to find a word.. I've tried your code Thorpe, thanks for that, but I'm getting this error:

Warning: fclose(): supplied argument is not a valid stream resource in (path) on line 10

 

 

I also have an existing search script that I thought I could modify to do this, would I be able to accomplish this by fiddling around with this line, which I think is the one controlling the finding of the word?

 

if(preg_match("/$word/i",$found)&&(!in_array($found, $file)))

 

[bundyxc]

Try this instead:

 

<?php
$f = fopen("file.txt", "r");
while ($scan = fscanf($f, "%s-%s\n")) {
  list ($item, $junk) = $scan;
  if ($item == 'sequence') {
    echo "found";
  }
}
fclose($f);
?>

 

The line of code you have below is PHP Regex.. not my specialty. Try posting in the regex forum.

[phpSensei]

^^^  Should explain it was just a typo by Thorpe. He made a reasonable mistake, just forgot to close the $f, instead he put $handle

[bundyxc]

Sorry, thought it was obvious.

Not taking credit for his work, just fixing the typo.

 

I'm a tool, I'm a tool, I'm a tool.

[phpSensei]

Sorry, thought it was obvious.

Not taking credit for his work, just fixing the typo.

 

I'm a tool, I'm a tool, I'm a tool.

 

oh haha thats not what i ment. just always good to let the guy know how to fix the mistake next time, but checking all his variables are correct.

[rachelk]

Thanks, I really appreciate the help.

 

I think this is just too advanced for me, I tried the edited code there but it just outputs an empty page, I think I'll just learn the basics a bit more and then attempt to do this because I'm getting nowhere and am not understanding why. Thanks again for the help.

[phpSensei]

$f = fopen("file.txt", "r");
while ($scan = fscanf($f, "%s-%s\n")) {
  list ($item, $junk) = $scan;
  if ($item == 'sequence') {
    echo "found";
  }
}
fclose($handle);

 

I was curious to know, the format requirement for the 2nd argument of the fscanf function that must follow the sprintf documentation, states that "s"  is treated as and presented as a string, does this include special characters, spaces, numeric values..etc?

[phpSensei]

$f = fopen("file.txt", "r");
while ($scan = fscanf($f, "%s-%s\n")) {
  list ($item, $junk) = $scan;
  if ($item == 'sequence') {
    echo "found";
  }
}
fclose($handle);

 

I also realised this is NOT the correct format to use. The array brings back word-word, instead of word,-,word

[phpSensei]

another thing!!! lol

 

- (Left-justifies the variable value)

 

that sign cant be used!!!

[phpSensei]

okay try this

 

<?php
$handle = fopen("file.txt","r");
if($handle){
while(!feof($handle)){
$words = fgets($handle,1024);
$word = explode("-",$words);
   if($word[0] == "sequence"){
      print "found!";
    }
  }
fclose($handle);
}
?>

 

apple-sequence
orange-sequence
sequence-sequence