Using php, I'm trying to create a script which will search within a text file and grab that entire line and echo it.
I have a text file (.txt) titled "numorder.txt" and within that text file, there are several lines of data, with new lines coming in every 5 minutes (using cron job). The data looks similar to:
2 aullah1
7 name
12 username
How would I go about creating a php script which will search for the data "aullah1" and then grab the entire line and echo it? (Once echoed, it should display "2 aullah1" (without quotations).
If I didn't explain anything clearly and/or you'd like me to explain in more detail, please comment.
This question is related to
php
search
echo
text-files
<?php
// What to look for
$search = 'foo';
// Read from file
$lines = file('file.txt');
foreach($lines as $line)
{
// Check if the line contains the string we're looking for, and print if it does
if(strpos($line, $search) !== false)
echo $line;
}
When tested on this file:
foozah
barzah
abczah
It outputs:
foozah
Update:
To show text if the text is not found, use something like this:
<?php
$search = 'foo';
$lines = file('file.txt');
// Store true when the text is found
$found = false;
foreach($lines as $line)
{
if(strpos($line, $search) !== false)
{
$found = true;
echo $line;
}
}
// If the text was not found, show a message
if(!$found)
{
echo 'No match found';
}
Here I'm using the $found
variable to find out if a match was found.
$searchfor = $_GET['keyword'];
$file = 'users.txt';
$contents = file_get_contents($file);
$pattern = preg_quote($searchfor, '/');
$pattern = "/^.*$pattern.*\$/m";
if (preg_match_all($pattern, $contents, $matches)) {
echo "Found matches:<br />";
echo implode("<br />", $matches[0]);
} else {
echo "No matches found";
fclose ($file);
}
looks like you're better off systeming out to system("grep \"$QUERY\"")
since that script won't be particularly high performance either way. Otherwise http://php.net/manual/en/function.file.php shows you how to loop over lines and you can use http://php.net/manual/en/function.strstr.php for finding matches.
Do it like this. This approach lets you search a file of any size (big size won't crash the script) and will return ALL lines that match the string you want.
<?php
$searchthis = "mystring";
$matches = array();
$handle = @fopen("path/to/inputfile.txt", "r");
if ($handle)
{
while (!feof($handle))
{
$buffer = fgets($handle);
if(strpos($buffer, $searchthis) !== FALSE)
$matches[] = $buffer;
}
fclose($handle);
}
//show results:
print_r($matches);
?>
Note the way strpos
is used with !==
operator.
one way...
$needle = "blah";
$content = file_get_contents('file.txt');
preg_match('~^(.*'.$needle.'.*)$~',$content,$line);
echo $line[1];
though it would probably be better to read it line by line with fopen() and fread() and use strpos()
Source: Stackoverflow.com