161 lines
3.3 KiB
PHP
161 lines
3.3 KiB
PHP
<?php
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/**
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* Class MC4WP_Debug_Log_Reader
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*/
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class MC4WP_Debug_Log_Reader
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{
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/**
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* @var resource|null
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*/
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private $handle;
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/**
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* @var string
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*/
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private static $regex = '/^(\[[\d \-\:]+\]) (\w+\:) (.*)$/S';
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/**
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* @var string
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*/
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private static $html_template = '<span class="time">$1</span> <span class="level">$2</span> <span class="message">$3</span>';
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/**
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* @var string The log file location.
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*/
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private $file;
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/**
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* MC4WP_Debug_Log_Reader constructor.
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*
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* @param $file
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*/
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public function __construct($file)
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{
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$this->file = $file;
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}
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/**
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* @return string
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*/
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public function all()
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{
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return file_get_contents($this->file);
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}
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/**
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* Sets file pointer to $n of lines from the end of file.
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*
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* @param int $n
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*/
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private function seek_line_from_end($n)
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{
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$line_count = 0;
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// get line count
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while (! feof($this->handle)) {
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fgets($this->handle);
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++$line_count;
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}
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// rewind to beginning
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rewind($this->handle);
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// calculate target
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$target = $line_count - $n;
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$target = $target > 1 ? $target : 1; // always skip first line because oh PHP header
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$current = 0;
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// keep reading until we're at target
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while ($current < $target) {
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fgets($this->handle);
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++$current;
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}
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}
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/**
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* @return string|null
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*/
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public function read()
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{
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// open file if not yet opened
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if (! is_resource($this->handle)) {
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// doesn't exist?
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if (! file_exists($this->file)) {
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return null;
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}
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$this->handle = @fopen($this->file, 'r');
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// unable to read?
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if (! is_resource($this->handle)) {
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return null;
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}
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// set pointer to 1000 files from EOF
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$this->seek_line_from_end(1000);
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}
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// stop reading once we're at the end
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if (feof($this->handle)) {
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fclose($this->handle);
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$this->handle = null;
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return null;
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}
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// read line, up to 8kb
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$text = fgets($this->handle);
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// strip tags & trim
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$text = strip_tags($text);
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$text = trim($text);
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return $text;
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}
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/**
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* @return string
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*/
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public function read_as_html()
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{
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$line = $this->read();
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// null means end of file
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if (is_null($line)) {
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return null;
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}
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// empty string means empty line, but not yet eof
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if (empty($line)) {
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return '';
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}
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$line = preg_replace(self::$regex, self::$html_template, $line);
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return $line;
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}
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/**
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* Reads X number of lines.
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*
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* If $start is negative, reads from end of log file.
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*
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* @param int $start
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* @param int $number
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* @return string
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*/
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public function lines($start, $number)
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{
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$handle = fopen($start, 'r');
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$lines = '';
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$current_line = 0;
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while ($current_line < $number) {
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$lines .= fgets($handle);
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}
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fclose($handle);
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return $lines;
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}
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}
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