PHP Searching a text file?

[Padgoi]

Ok, right now, it's just a file that displays a random line from a text file. Here is the current script:


$myfile = 'random1.txt';

if(file_exists($myfile))
{
$file = file($myfile);
$lines = count($file) - 1;
echo $file[rand(0, $lines)];
}
else
trigger_error('File ' . $myfile . ' does not exist', E_USER_ERROR);




Can anyone help me out with adding a search to it? I want people to be able to search their email address or password to see if they're in the text file. Can anyone help me with this, my php knowledge is very limited?  Thank you in advance.

[Padgoi]

Ok, I have this to enter the thing the user is searching for:

<form action="page.php" method="post">
<fieldset>
<legend>Search Stolen Information</legend>
<label for="keyword">Email Address or Password:</label> <input type="text" id="keyword" name="search">

<input type="submit" value="Search">
</fieldset>
</form>

Now I just need the php script in page.php that actually searched the text file for the thing the user wants to search for.  Any help please?

[JasonLewis]

well the file() function returns the contents in an array. well... how is each line set out. like does each user have a thing like this:
[username]blah[password]blah[email]blah

etc etc.
how is it set otu?

[Padgoi]

I got it, thanks for the help.