PHP apache error log highlighter

php-log-highlight.php

#!/usr/bin/php
<?php
/**
 * Usage: tail -f /var/log/apache2/error.log | php-log-highlight
 */
ini_set('display_errors', E_ALL & ~E_STRICT);

// Dependencies
require_once 'Console/Color.php';

$input = fopen('php://stdin', 'r');

do {
	$line = fgets($input);
	if ($line) {
		cprint(highlight_log_line($line));
	} else {
		usleep(200);
	}
} while (true);

function cprint($str) {
	print Console_Color::convert($str);
}

function highlight_log_line($line) {
	// Escape %'s for Console_Color
	$line = preg_replace('/%/', '%%', $line);

	// Remove referer
	$line = preg_replace('/, referer: .+$/', '', $line);
	// Remove [error]
	$line = preg_replace('/(\[error\]) /', '', $line);
	// Remove [client ...]
	$line = preg_replace('/(\[client[^\[\]]+\]) /', '', $line);

	// Highlight and simplify timestamp
	$line = preg_replace('/\[[^\[\]]+(\d{2}:\d{2}:\d{2})[^\[\]]+\] /', '[%y\\1%n] ', $line);
	// Highlight depth in stack traces and file and line number
	$line = preg_replace('/( #\d+) (.*)\((\d+)\):/', '%g\\1%n %b\\2%n [%g\\3%n]', $line);
	// Highlight depth in stack traces, non files
	$line = preg_replace('/( #\d+)/', '%g\\1%n', $line);
	// Highlight PHP Stack trace: head
	$line = preg_replace('/PHP (Stack trace):/', 'PHP %g\\1%n:', $line);
	// Highlight PHP error type and message
	$line = preg_replace('/PHP ([a-zA-Z]+):  (.*) in (.*) on line (\d+)/', 'PHP %r\\1%n: %k\\2%n in %b\\3%n [%g\\4%n]', $line);

	// Highlight PHP Fatal error:
	$line = preg_replace('/PHP (Fatal error):  (.*) in (.*) on line (\d+)/', 'PHP %R\\1%n: %k\\2%n in %b\\3%n [%g\\4%n]', $line);
	// Highlight PHP Fatal error stack trace lines
	$line = preg_replace('/PHP\s+(\d+)\.\s+([^\s]+)\s+(.*):(\d+)/', '%g#\\1%n %b\\3%n [%g\\4%n] \\2', $line);

	// Strip paths relative to cwd
	$line = preg_replace('/' . preg_quote(getcwd(), '/') . '\//', '', $line);


	return $line;
}