LogStreamer

Simple class that takes a path to a file and gives you the following features:

• $stream->readLines(10) to get the first 10 lines as a string
• $stream->getLines(10) to get the first 10 lines as an array
• $stream->readLines(-10) to get the last 10 lines as a string
• $stream->getLines(-10) to get the last 10 lines as an array
• $stream->readIncremental() to get new content added to the file (as it's written to)

Also gives you a simple way of seeking lines:

• $stream->seekLines(10) to seek to the end of the first 10 lines
• $stream->seekLines(-10) to seek to the beginning of the last 10 lines
• $stream->seekReset() to reset the seek to the first byte
• $stream->seekEnd() to seek to the end

Note: Using a negative offset will return the lines in reverse order (last line first). This can be prevented by setting $returnOriginalOrder to true as such: $stream->readLines(-10, true)

Installation

composer require jalsoedesign/log-streamer

Usage

Instantiation

use jalsoedesign\LogStream\LogStream;

require_once('vendor/autoload.php');

$stream = LogStream::fromPath('foo.txt');

// OR

$handle = fread('foo.txt', r);
$stream = new LogStream($handle);

First 10 lines

Read the first 10 lines of a file and print them as text

$stream = LogStream::fromPath('foo.txt');

echo 'The first 10 lines:' . PHP_EOL;
echo $stream->readLines(10);

Read the first 10 lines of a file and print them as an array

$stream = LogStream::fromPath('foo.txt');

echo 'The first 10 lines:' . PHP_EOL;
print_r($stream->getLines(10));

Last 10 lines

Read the last 10 lines of a file and print them as text

$stream = LogStream::fromPath('foo.txt');

echo 'The last 10 lines:' . PHP_EOL;
echo $stream->readLines(-10);

Read the last 10 lines of a file and print them as an array

$stream = LogStream::fromPath('foo.txt');

echo 'The last 10 lines:' . PHP_EOL;
print_r($stream->getLines(-10));

Tail functionality

Read the last 10 lines of a file and then continue to printing content when the file gets updated

$stream = LogStream::fromPath('foo.txt');

$logStream->seekLines(-10);

$running = true;

echo 'The last 10 lines as well as all new content:' . PHP_EOL;

do {
    echo $logStream->readIncremental();

    usleep(100000);
} while ($running);

Open a stream and only print the bytes that have been added to the file after opening

$stream = \LogStream::fromPath('foo.txt');

$logStream->seekReset();

$running = true;

echo 'New file content:' . PHP_EOL;

do {
    echo $logStream->readIncremental();

    usleep(100000);
} while ($running);