And a PHP example, multiple matching lines will be displayed:
<?php
$file="somefile.txt";
$searchfor="name";
// the following line prevents the browser from parsing this as HTML.
header('Content-Type: text/plain');
// get the file contents, assuming the file to be readable (and exist)
$contents = file_get_contents($file);
// escape special characters in the query
$pattern = preg_quote($searchfor, "https://stackoverflow.com/");
// finalise the regular expression, matching the whole line
$pattern = "/^.*$pattern.*\$/m";
// search, and store all matching occurences in $matches
if (preg_match_all($pattern, $contents, $matches))
{
echo "Found matches:\n";
echo implode("\n", $matches[0]);
}
else
{
echo "No matches found";
}