Log watching

[Anonymous]

Hi Guys,

I managed to read log files. I know its not the way how it should looks like, but maybe one of you can use it, or can manage to make it right.

PHP:

<?php
        /**
     * read a log file last lines
     *
     * Author: László Simon
     *
     * @return html formed string
     */
function log_watch($log, $onlyerrors = true, $lines = 100, $block_size = 4096, $showRealLineNumbers = false) {
$out = '';
$a = last_lines($log, $lines+1, 512);
$s = true;
$i=$lines+1;
if ($showRealLineNumbers) $i = count_lines($log, 4096)-1;
$color_err = '#FF0000';
$color_warn = 'yellow';
$color_exc = '#FF6600';
$color_fail = 'orange';
$out .= '<div class="logtitle"><span>'.$log.'<small style="float:right">(shows the last '.$lines.' lines in reverse order)</small></span>';
$out .= '<div class="scrollContent"><table class="scrollTable">
<tbody class="scrollContent">';
foreach ($a as $v) {
    $tr_bgcolor = '';
    $type = '';
    if ( $a[0] != $v) {
        if (!$onylerrors || (strpos($v,'Error') || strpos($v,'Exception') || strpos($v,'Warning') || strpos($v,'Failed'))) {
    //'Error, Exception, Warning, Failed

            if (strpos($v,'Error')) {$tr_bgcolor = 'style="background-color:'.$tr_bgcolor.$color_err.';"'; $type='Error';} //strpos is not case sensitive!
            if (strpos($v,'Exception')) {$tr_bgcolor = 'style="background-color:'.$tr_bgcolor.$color_exc.';"'; $type='Exception';}
            if (strpos($v,'Warning')) {$tr_bgcolor = 'style="background-color:'.$tr_bgcolor.$color_warn.';"'; $type='Warning';}
            if (strpos($v,'Failed')) {$tr_bgcolor = 'style="background-color:'.$tr_bgcolor.$color_fail.';"'; $type='Failed';}

            if ($s) $out .= '<tr class="normalRow">';
            else    $out .= '<tr class="alternateRow">';

            $out .= '<td>';
            $out .= $i;
            $out .= '</td>';
            $out .= '<td>';
            $out .= $type;
            $out .= '</td>';
            $out .= '<td '.$tr_bgcolor.'>';
            $out .= $v;
            $out .= '</td>';
            $out .= '</tr>';
            }
    }
    $i-=1;
    $s=!$s;
    }

    $out .= '</tbody>
    </table>
    </div></div>';

    return $out;
}
function last_lines($path, $line_count, $block_size = 512){
    $lines = array();
    // we will always have a fragment of a non-complete line
    // keep this in here till we have our next entire line.
    $leftover = "";
    $fh = fopen($path, 'r');
    // go to the end of the file
    fseek($fh, 0, SEEK_END);
    do{
        // need to know whether we can actually go back
        // $block_size bytes
        $can_read = $block_size;
        if(ftell($fh) < $block_size){
            $can_read = ftell($fh);
        }
        // go back as many bytes as we can
        // read them to $data and then move the file pointer
        // back to where we were.
        fseek($fh, -$can_read, SEEK_CUR);
        $data = fread($fh, $can_read);
        $data .= $leftover;
        fseek($fh, -$can_read, SEEK_CUR);
        // split lines by \n. Then reverse them,
        // now the last line is most likely not a complete
        // line which is why we do not directly add it, but
        // append it to the data read the next time.
        $split_data = array_reverse(explode("\n", $data));
        $new_lines = array_slice($split_data, 0, -1);
        $lines = array_merge($lines, $new_lines);
        $leftover = $split_data[count($split_data) - 1];
    }
    while(count($lines) < $line_count && ftell($fh) != 0);
    if(ftell($fh) == 0){
        $lines[] = $leftover;
    }
    fclose($fh);
    // Usually, we will read too many lines, correct that here.
    return array_slice($lines, 0, $line_count);
}
function count_lines($path, $block_size = 4096) {
$file = $path;
$linecount = 0;
$handle = fopen($file, "r");
while(!feof($handle)){
  $line = fgets($handle, $block_size);
  $linecount = $linecount + substr_count($line, PHP_EOL);
}
fclose($handle);
return $linecount;
}
?>

CSS:

tbody.scrollContent td, tbody.scrollContent tr.normalRow td {
    color: #000;
    background: #FFF;
    border-bottom: none;
    border-left: none;
    border-right: 1px solid #CCC;
    border-top: 1px solid #DDD;
    padding: 2px 3px 3px 4px;
    font: normal normal 12px Courier New, Geneva, Arial, Helvetica, sans-serif
}
tbody.scrollContent tr.alternateRow td {
    color: #000;
    background: #EEE;
    border-bottom: none;
    border-left: none;
    border-right: 1px solid #CCC;
    border-top: 1px solid #DDD;
    padding: 2px 3px 3px 4px;
    font: normal normal 12px Courier New, Geneva, Arial, Helvetica, sans-serif
}
div.logtitle {
background-color:#EDEDED;
font-family: Verdana, "Bitstream Vera Sans";
font-weight: bold;
font-size: 100%;
color: #2B2828;
}
div.scrollContent {
width:100%;
height:250px;
overflow: scroll;
}
table.scrollTable {
width:100%;
height: 250px;
padding: 0px;
font-size: 16px;
border:0;
padding:0;
border-spacing:0;
}
#logs {
    width: 915px;
}

Code into index_dynamic.html:

 <div id="logs"><h2><span>Logs</span></h2>
      <?php include '/test/readlog.php'; echo log_watch("C:\HB\HeartBeatMonitor.log",false,100,4096,true); ?>
</div>

For me its perfect, I hope it will help you also.

[Erkan]

Hi,

I think it's a great idea of plugin for the next version, thanks.

We can also used the tail command (on Linux)