efreed · June 9, 2014 18:27
diff --git a/errorlog.php b/errorlog.php
 // No configuration needed, will automatically find the Apache log folder and read error.log
 // Initialy displays the last 2k of contents and auto updates (and auto scrolls) as new lines show up
 // Can enter a search phrase in the UI to ignore any new lines that do (or don't) contain the phrase

 $tail = new PHPTail(GetApacheLogPath());
 if(isset($_GET['ajax'])) { //We're getting an AJAX call
 	echo $tail->getNewLines($_GET['lastsize'], $_GET['grep'], $_GET['invert']);
 	exit();
 }
 // Regular GET/POST call, print out the GUI
 $tail->generateGUI();
 exit;

 function GetApacheLogPath() {
 	ob_start();
 	phpinfo();
 	$info = ob_get_clean();
 	preg_match('/APACHE_LOG_DIR \<\/td\>[^\<]*<td[^\>]*>(?P<path>[^\<]*)/', $info, $matches);
 	if (isset($matches['path']) && trim($matches['path'])!='')
 		return trim($matches['path']) . DIRECTORY_SEPARATOR . 'error.log';
 	return false;
 }

 // From https://code.google.com/p/php-tail/source/browse/trunk/PHPTail.php
 // Then traded Log.php for document.location.href
 // Then defaulted to show last 2k of contents on page load
 class PHPTail {
 	/**
 	 * Location of the log file we're tailing
 	 * @var string
 	 */
 	private $log = "";
 	/**
 	 * The time between AJAX requests to the server.
 	 *
 	 * Setting this value too high with an extremly fast-filling log will cause your PHP application to hang.
 	 * @var integer
 	 */
 	private $updateTime;
 	/**
 	 * This variable holds the maximum amount of bytes this application can load into memory (in bytes).
 	 * @var string
 	 */
 	private $maxSizeToLoad;
 	/**
 	 *
 	 * PHPTail constructor
 	 * @param string $log the location of the log file
 	 * @param integer $defaultUpdateTime The time between AJAX requests to the server.
 	 * @param integer $maxSizeToLoad This variable holds the maximum amount of bytes this application can load into memory (in bytes). Default is 2 Megabyte = 2097152 byte
 	 */
 	public function __construct($log, $defaultUpdateTime = 2000, $maxSizeToLoad = 2097152) {
 		$this->log = $log;
 		$this->updateTime = $defaultUpdateTime;
 		$this->maxSizeToLoad = $maxSizeToLoad;
 	}
 	/**
 	 * This function is in charge of retrieving the latest lines from the log file
 	 * @param string $lastFetchedSize The size of the file when we lasted tailed it.  
 	 * @param string $grepKeyword The grep keyword. This will only return rows that contain this word
 	 * @return Returns the JSON representation of the latest file size and appended lines.
 	 */
 	public function getNewLines($lastFetchedSize, $grepKeyword, $invert) {
 		/**
 		 * Clear the stat cache to get the latest results
 		 */
 		clearstatcache();
 		/**
 		 * Define how much we should load from the log file
 		 * @var
 		 */
 		$fsize = filesize($this->log);
 		$maxLength = ($fsize - $lastFetchedSize);
 		/**
 		 * Verify that we don't load more data then allowed.
 		 */
 		if($maxLength > $this->maxSizeToLoad) {
 				return json_encode(array("size" => $fsize, "data" => array("ERROR: PHPTail attempted to load more (".round(($maxLength / 1048576), 2)."MB) then the maximum size (".round(($this->maxSizeToLoad / 1048576), 2)."MB) of bytes into memory. You should lower the defaultUpdateTime to prevent this from happening. ")));  
 		}
 		/**
 		 * Actually load the data
 		 */
 		$data = array();
 		if($maxLength > 0) {

 				$fp = fopen($this->log, 'r');
 				fseek($fp, -$maxLength , SEEK_END);
 				$data = explode("\n", fread($fp, $maxLength));

 		}
 		/**
 		 * Run the grep function to return only the lines we're interested in.
 		 */
 		if($invert == 0) {
 				$data = preg_grep("/$grepKeyword/",$data);
 		}
 		else {
 				$data = preg_grep("/$grepKeyword/",$data, PREG_GREP_INVERT);
 		}
 		/**
 		 * If the last entry in the array is an empty string lets remove it.
 		 */
 		if(end($data) == "") {
 				array_pop($data);
 		}
 		return json_encode(array("size" => $fsize, "data" => $data));  
 	}
 	/**
 	 * This function will print out the required HTML/CSS/JS
 	 */
 	public function generateGUI() {
 		?>
 		<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
 		"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 		<html xmlns="http://www.w3.org/1999/xhtml">
 				<head>
 						<title>PHPTail</title>
 						<meta http-equiv="content-type" content="text/html;charset=utf-8" />

 						<link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/themes/flick/jquery-ui.css" rel="stylesheet"></link>
 						<style type="text/css">
 								#grepKeyword, #settings {
 										font-size: 80%;
 								}
 								.float {
 										background: white;
 										border-bottom: 1px solid black;
 										padding: 10px 0 10px 0;
 										margin: 0px;  
 										height: 30px;
 										width: 100%;
 										text-align: left;
 								}
 								.results {
 										padding-bottom: 20px;
 								}
 						</style>

 						<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
 						<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/jquery-ui.min.js"></script>

 						<script type="text/javascript">
 								/* <![CDATA[ */
 								//Last know size of the file
 								lastSize = <?php echo max(0,filesize($this->log)-2000); ?>;
 								//Grep keyword
 								grep = "";
 								//Should the Grep be inverted?
 								invert = 0;
 								//Last known document height
 								documentHeight = 0;
 								//Last known scroll position
 								scrollPosition = 0;
 								//Should we scroll to the bottom?
 								scroll = true;
 								$(document).ready(function(){

 										// Setup the settings dialog
 										$( "#settings" ).dialog({
 												modal: true,
 												resizable: false,
 												draggable: false,
 												autoOpen: false,
 												width: 590,
 												height: 270,
 												buttons: {
 														Close: function() {
 																$( this ).dialog( "close" );
 														}
 												},
 												close: function(event, ui) {
 														grep = $("#grep").val();
 														invert = $('#invert input:radio:checked').val();
 														$("#grepspan").html("Grep keyword: \"" + grep + "\"");
 														$("#invertspan").html("Inverted: " + (invert == 1 ? 'true' : 'false'));
 												}
 										});
 										//Close the settings dialog after a user hits enter in the textarea
 										$('#grep').keyup(function(e) {
 												if(e.keyCode == 13) {
 														$( "#settings" ).dialog('close');
 												}
 										});            
 										//Focus on the textarea                                
 										$("#grep").focus();
 										//Settings button into a nice looking button with a theme
 										$("#grepKeyword").button();
 										//Settings button opens the settings dialog
 										$("#grepKeyword").click(function(){
 												$( "#settings" ).dialog('open');
 												$("#grepKeyword").removeClass('ui-state-focus');
 										});
 										//Set up an interval for updating the log. Change updateTime in the PHPTail contstructor to change this
 										setInterval ( "updateLog()", <?php echo $this->updateTime; ?> );
 										//Some window scroll event to keep the menu at the top
 										$(window).scroll(function(e) {
 											if ($(window).scrollTop() > 0) {
 												$('.float').css({
 													position: 'fixed',
 													top: '0',
 													left: 'auto'
 												});
 											} else {
 												$('.float').css({
 													position: 'static'
 												});
 											}
 										});
 										//If window is resized should we scroll to the bottom?
 										$(window).resize(function(){
 												if(scroll) {
 														scrollToBottom();
 												}
 										});
 										//Handle if the window should be scrolled down or not
 										$(window).scroll(function(){
 												documentHeight = $(document).height();
 												scrollPosition = $(window).height() + $(window).scrollTop();
 												if(documentHeight <= scrollPosition) {
 														scroll = true;
 												}
 												else {
 														scroll = false;
 												}
 										});
 										scrollToBottom();

 								});
 								//This function scrolls to the bottom
 								function scrollToBottom() {
 										$('.ui-widget-overlay').width($(document).width());
 									$('.ui-widget-overlay').height($(document).height());

 										$("html, body").scrollTop($(document).height());
 										if($( "#settings" ).dialog("isOpen")) {
 												$('.ui-widget-overlay').width($(document).width());
 											$('.ui-widget-overlay').height($(document).height());
 											$( "#settings" ).dialog("option", "position", "center");
 										}
 								}
 								//This function queries the server for updates.
 								function updateLog() {
 										$.getJSON(document.location.href+'?ajax=1&lastsize='+lastSize + '&grep='+grep + '&invert='+invert, function(data) {
 												lastSize = data.size;
 												$.each(data.data, function(key, value) {
 														$("#results").append('' + value + '<br/>');
 												});
 												if(scroll) {
 														scrollToBottom();
 												}
 										});
 								}
 								/* ]]> */
 						</script>
 				</head>
 				<body>
 						<div id="settings" title="PHPTail settings">
 								<p>Grep keyword (return results that contain this keyword)</p>
 								<input id="grep" type="text" value=""/>
 								<p>Should the grep keyword be inverted? (Return results that do NOT contain the keyword)</p>
 								<div id="invert">
 										<input type="radio" value="1" id="invert1" name="invert" /><label for="invert1">Yes</label>
 										<input type="radio" value="0" id="invert2" name="invert" checked="checked" /><label for="invert2">No</label>
 								</div>
 						</div>
 						<div class="float">
 								<button id="grepKeyword">Settings</button>
 								<span>Tailing file: <?php echo $this->log; ?></span> | <span id="grepspan">Grep keyword: ""</span> | <span id="invertspan">Inverted: false</span>
 						</div>
 						<div id="results">
 						</div>
 				</body>
 		</html>
 		<?php
 	}
 }
	// No configuration needed, will automatically find the Apache log folder and read error.log
	// Initialy displays the last 2k of contents and auto updates (and auto scrolls) as new lines show up
	// Can enter a search phrase in the UI to ignore any new lines that do (or don't) contain the phrase

	$tail = new PHPTail(GetApacheLogPath());
	if(isset($_GET['ajax'])) { //We're getting an AJAX call
	echo $tail->getNewLines($_GET['lastsize'], $_GET['grep'], $_GET['invert']);
	exit();
	}
	// Regular GET/POST call, print out the GUI
	$tail->generateGUI();
	exit;

	function GetApacheLogPath() {
	ob_start();
	phpinfo();
	$info = ob_get_clean();
	preg_match('/APACHE_LOG_DIR \<\/td\>[^\<]<td[^\>]>(?P<path>[^\<]*)/', $info, $matches);
	if (isset($matches['path']) && trim($matches['path'])!='')
	return trim($matches['path']) . DIRECTORY_SEPARATOR . 'error.log';
	return false;
	}

	// From https://code.google.com/p/php-tail/source/browse/trunk/PHPTail.php
	// Then traded Log.php for document.location.href
	// Then defaulted to show last 2k of contents on page load
	class PHPTail {
	/**
	* Location of the log file we're tailing
	* @var string
	*/
	private $log = "";
	/**
	* The time between AJAX requests to the server.
	*
	* Setting this value too high with an extremly fast-filling log will cause your PHP application to hang.
	* @var integer
	*/
	private $updateTime;
	/**
	* This variable holds the maximum amount of bytes this application can load into memory (in bytes).
	* @var string
	*/
	private $maxSizeToLoad;
	/**
	*
	* PHPTail constructor
	* @param string $log the location of the log file
	* @param integer $defaultUpdateTime The time between AJAX requests to the server.
	* @param integer $maxSizeToLoad This variable holds the maximum amount of bytes this application can load into memory (in bytes). Default is 2 Megabyte = 2097152 byte
	*/
	public function __construct($log, $defaultUpdateTime = 2000, $maxSizeToLoad = 2097152) {
	$this->log = $log;
	$this->updateTime = $defaultUpdateTime;
	$this->maxSizeToLoad = $maxSizeToLoad;
	}
	/**
	* This function is in charge of retrieving the latest lines from the log file
	* @param string $lastFetchedSize The size of the file when we lasted tailed it.
	* @param string $grepKeyword The grep keyword. This will only return rows that contain this word
	* @return Returns the JSON representation of the latest file size and appended lines.
	*/
	public function getNewLines($lastFetchedSize, $grepKeyword, $invert) {
	/**
	* Clear the stat cache to get the latest results
	*/
	clearstatcache();
	/**
	* Define how much we should load from the log file
	* @var
	*/
	$fsize = filesize($this->log);
	$maxLength = ($fsize - $lastFetchedSize);
	/**
	* Verify that we don't load more data then allowed.
	*/
	if($maxLength > $this->maxSizeToLoad) {
	return json_encode(array("size" => $fsize, "data" => array("ERROR: PHPTail attempted to load more (".round(($maxLength / 1048576), 2)."MB) then the maximum size (".round(($this->maxSizeToLoad / 1048576), 2)."MB) of bytes into memory. You should lower the defaultUpdateTime to prevent this from happening. ")));
	}
	/**
	* Actually load the data
	*/
	$data = array();
	if($maxLength > 0) {

	$fp = fopen($this->log, 'r');
	fseek($fp, -$maxLength , SEEK_END);
	$data = explode("\n", fread($fp, $maxLength));

	}
	/**
	* Run the grep function to return only the lines we're interested in.
	*/
	if($invert == 0) {
	$data = preg_grep("/$grepKeyword/",$data);
	}
	else {
	$data = preg_grep("/$grepKeyword/",$data, PREG_GREP_INVERT);
	}
	/**
	* If the last entry in the array is an empty string lets remove it.
	*/
	if(end($data) == "") {
	array_pop($data);
	}
	return json_encode(array("size" => $fsize, "data" => $data));
	}
	/**
	* This function will print out the required HTML/CSS/JS
	*/
	public function generateGUI() {
	?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<title>PHPTail</title>
	<meta http-equiv="content-type" content="text/html;charset=utf-8" />

	<link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/themes/flick/jquery-ui.css" rel="stylesheet"></link>
	<style type="text/css">
	#grepKeyword, #settings {
	font-size: 80%;
	}
	.float {
	background: white;
	border-bottom: 1px solid black;
	padding: 10px 0 10px 0;
	margin: 0px;
	height: 30px;
	width: 100%;
	text-align: left;
	}
	.results {
	padding-bottom: 20px;
	}
	</style>

	<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
	<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/jquery-ui.min.js"></script>

	<script type="text/javascript">
	/* <![CDATA[ */
	//Last know size of the file
	lastSize = <?php echo max(0,filesize($this->log)-2000); ?>;
	//Grep keyword
	grep = "";
	//Should the Grep be inverted?
	invert = 0;
	//Last known document height
	documentHeight = 0;
	//Last known scroll position
	scrollPosition = 0;
	//Should we scroll to the bottom?
	scroll = true;
	$(document).ready(function(){

	// Setup the settings dialog
	$( "#settings" ).dialog({
	modal: true,
	resizable: false,
	draggable: false,
	autoOpen: false,
	width: 590,
	height: 270,
	buttons: {
	Close: function() {
	$( this ).dialog( "close" );
	}
	},
	close: function(event, ui) {
	grep = $("#grep").val();
	invert = $('#invert input:radio:checked').val();
	$("#grepspan").html("Grep keyword: \"" + grep + "\"");
	$("#invertspan").html("Inverted: " + (invert == 1 ? 'true' : 'false'));
	}
	});
	//Close the settings dialog after a user hits enter in the textarea
	$('#grep').keyup(function(e) {
	if(e.keyCode == 13) {
	$( "#settings" ).dialog('close');
	}
	});
	//Focus on the textarea
	$("#grep").focus();
	//Settings button into a nice looking button with a theme
	$("#grepKeyword").button();
	//Settings button opens the settings dialog
	$("#grepKeyword").click(function(){
	$( "#settings" ).dialog('open');
	$("#grepKeyword").removeClass('ui-state-focus');
	});
	//Set up an interval for updating the log. Change updateTime in the PHPTail contstructor to change this
	setInterval ( "updateLog()", <?php echo $this->updateTime; ?> );
	//Some window scroll event to keep the menu at the top
	$(window).scroll(function(e) {
	if ($(window).scrollTop() > 0) {
	$('.float').css({
	position: 'fixed',
	top: '0',
	left: 'auto'
	});
	} else {
	$('.float').css({
	position: 'static'
	});
	}
	});
	//If window is resized should we scroll to the bottom?
	$(window).resize(function(){
	if(scroll) {
	scrollToBottom();
	}
	});
	//Handle if the window should be scrolled down or not
	$(window).scroll(function(){
	documentHeight = $(document).height();
	scrollPosition = $(window).height() + $(window).scrollTop();
	if(documentHeight <= scrollPosition) {
	scroll = true;
	}
	else {
	scroll = false;
	}
	});
	scrollToBottom();

	});
	//This function scrolls to the bottom
	function scrollToBottom() {
	$('.ui-widget-overlay').width($(document).width());
	$('.ui-widget-overlay').height($(document).height());

	$("html, body").scrollTop($(document).height());
	if($( "#settings" ).dialog("isOpen")) {
	$('.ui-widget-overlay').width($(document).width());
	$('.ui-widget-overlay').height($(document).height());
	$( "#settings" ).dialog("option", "position", "center");
	}
	}
	//This function queries the server for updates.
	function updateLog() {
	$.getJSON(document.location.href+'?ajax=1&lastsize='+lastSize + '&grep='+grep + '&invert='+invert, function(data) {
	lastSize = data.size;
	$.each(data.data, function(key, value) {
	$("#results").append('' + value + '<br/>');
	});
	if(scroll) {
	scrollToBottom();
	}
	});
	}
	/* ]]> */
	</script>
	</head>
	<body>
	<div id="settings" title="PHPTail settings">
	<p>Grep keyword (return results that contain this keyword)</p>
	<input id="grep" type="text" value=""/>
	<p>Should the grep keyword be inverted? (Return results that do NOT contain the keyword)</p>
	<div id="invert">
	<input type="radio" value="1" id="invert1" name="invert" /><label for="invert1">Yes</label>
	<input type="radio" value="0" id="invert2" name="invert" checked="checked" /><label for="invert2">No</label>
	</div>
	</div>
	<div class="float">
	<button id="grepKeyword">Settings</button>
	<span>Tailing file: <?php echo $this->log; ?></span> \| <span id="grepspan">Grep keyword: ""</span> \| <span id="invertspan">Inverted: false</span>
	</div>
	<div id="results">
	</div>
	</body>
	</html>
	<?php
	}
	}