crash-report-tools/get-explosives.php

674 строки
26 KiB
PHP
Executable File

#!/usr/bin/php
<?php
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
// This script retrieves explosiveness stats for crash signatures.
// *** non-commandline handling ***
if (php_sapi_name() != 'cli') {
// not commandline, assume apache and output own source
header('Content-Type: text/plain; charset=utf8');
print(file_get_contents($_SERVER['SCRIPT_FILENAME']));
exit;
}
include_once('datautils.php');
// *** script settings ***
// turn on error reporting in the script output
ini_set('display_errors', 1);
// make sure new files are set to -rw-r--r-- permissions
umask(022);
// set default time zone - right now, always the one the server is in!
date_default_timezone_set('America/Los_Angeles');
// set higher memory limit so we can process large SQL results
ini_set('memory_limit', '512M');
// *** data gathering variables ***
// reports to gather. fields:
// product - product name
// version - empty is all versions
// fake_adu - no ADUs known, fake the value
// mincount - minimum count of crashes per day to analyze
$reports = array(array('product'=>'Firefox',
'version'=>'17',
'version_regex'=>'17\..*', // keep around for ESR
'fake_adu'=>false,
'mincount'=>20,
),
array('product'=>'Firefox',
'version'=>'24',
'version_regex'=>'24\..*',
'fake_adu'=>false,
'mincount'=>100,
),
array('product'=>'Firefox',
'version'=>'25',
'version_regex'=>'25\..*',
'fake_adu'=>false,
'mincount'=>50,
),
array('product'=>'Firefox',
'version'=>'26',
'version_regex'=>'26\..*',
'fake_adu'=>false,
'mincount'=>10,
),
array('product'=>'Firefox',
'version'=>'27',
'version_regex'=>'27\..*',
'fake_adu'=>false,
'mincount'=>10,
),
array('product'=>'Firefox',
'version'=>'28',
'version_regex'=>'28\..*',
'fake_adu'=>false,
'mincount'=>10,
),
array('product'=>'Firefox',
'channel'=>'aurora',
'fake_adu'=>false,
'mincount'=>10,
),
array('product'=>'Firefox',
'channel'=>'nightly',
'fake_adu'=>false,
'mincount'=>10,
),
array('product'=>'MetroFirefox',
'channel'=>'aurora',
'fake_adu'=>false,
'mincount'=>6,
),
array('product'=>'MetroFirefox',
'channel'=>'nightly',
'fake_adu'=>false,
'mincount'=>6,
),
array('product'=>'FennecAndroid',
'version'=>'24',
'version_regex'=>'24\..*',
'fake_adu'=>false,
'mincount'=>50,
),
array('product'=>'FennecAndroid',
'version'=>'25',
'version_regex'=>'25\..*',
'fake_adu'=>false,
'mincount'=>30,
),
array('product'=>'FennecAndroid',
'version'=>'26',
'version_regex'=>'26\..*',
'fake_adu'=>false,
'mincount'=>10,
),
array('product'=>'FennecAndroid',
'channel'=>'aurora',
'fake_adu'=>false,
'mincount'=>6,
),
array('product'=>'FennecAndroid',
'channel'=>'nightly',
'fake_adu'=>false,
'mincount'=>6,
),
);
// for how many days back to get the data
$backlog_days = 20;
// *** explosiveness tuning ***
$exp_vars = array(
// minimum of crashes/ADU to use as "dist" values
'clamp_1' => 30,
'clamp_3' => 15,
// limit for explosiveness output to trigger warning
'limit_1' => 2,
'limit_3' => 2,
);
// *** URLs and paths ***
$on_moz_server = file_exists('/mnt/crashanalysis/rkaiser/');
$url_algolink = 'https://wiki.mozilla.org/CrashKill/Plan/Explosive';
$url_siglinkbase = 'https://crash-stats.mozilla.com/report/list?signature=';
$url_nullsiglink = 'https://crash-stats.mozilla.com/report/list?missing_sig=EMPTY_STRING';
$url_buglinkbase = 'https://bugzilla.mozilla.org/show_bug.cgi?id=';
// File storing the DB access data - including password!
$fdbsecret = '/home/rkaiser/.socorro-prod-dbsecret.json';
if ($on_moz_server) { chdir('/mnt/crashanalysis/rkaiser/'); }
else { chdir('/mnt/mozilla/projects/socorro/'); }
// *** code start ***
// get current day
$curtime = time();
if (file_exists($fdbsecret)) {
$dbsecret = json_decode(file_get_contents($fdbsecret), true);
if (!is_array($dbsecret) || !count($dbsecret)) {
print('ERROR: No DB secrets found, aborting!'."\n");
exit(1);
}
$db_conn = pg_pconnect('host='.$dbsecret['host']
.' port='.$dbsecret['port']
.' dbname=breakpad'
.' user='.$dbsecret['user']
.' password='.$dbsecret['password']);
if (!$db_conn) {
print('ERROR: DB connection failed, aborting!'."\n");
exit(1);
}
// For info on what data can be accessed, see also
// http://socorro.readthedocs.org/en/latest/databasetabledesc.html
// For the DB schema, see
// https://github.com/mozilla/socorro/blob/master/sql/schema.sql
}
else {
// Won't work! (Set just for documenting what fields are in the file.)
$dbsecret = array('host' => 'host.m.c', 'port' => '6432',
'user' => 'analyst', 'password' => 'foo');
print('ERROR: No DB secrets found, aborting!'."\n");
exit(1);
}
foreach ($reports as $rep) {
$channel = array_key_exists('channel', $rep)?$rep['channel']:'';
$ver = array_key_exists('version', $rep)?$rep['version']:'';
$prd = strtolower($rep['product']);
$prdvershort = (($prd == 'firefox')?'ff':(($prd == 'fennec')?'fn':(($prd == 'fennecandroid')?'fna':$prd)))
.(strlen($channel)?'-'.$channel:'')
.(strlen($ver)?'-'.$ver:'');
$prdverfile = $prd
.(strlen($channel)?'.'.$channel:'')
.(strlen($ver)?'.'.$ver:'');
$prdverdisplay = $rep['product']
.(strlen($channel)?' '.ucfirst($channel):'')
.(strlen($ver)?' '.(isset($rep['version_display'])?$rep['version_display']:$ver):'');
$crdata = array();
$adu = array();
$virtual_adu = array(); // reduced for throttling
$total = array();
$sigcnt = array();
$pv_ids = array();
$pv_query =
'SELECT product_version_id '
.'FROM product_versions '
."WHERE product_name = '".$rep['product']."'"
.(strlen($ver)
?' AND release_version '.(isset($rep['version_regex'])
?"~ '^".$rep['version_regex']."$'"
:"= '".$ver."'")
:'')
.(strlen($channel)?" AND build_type = '".ucfirst($channel)."'":'')
.';';
$pv_result = pg_query($db_conn, $pv_query);
if (!$pv_result) {
print('--- ERROR: product version query failed!'."\n");
}
while ($pv_row = pg_fetch_array($pv_result)) {
$pv_ids[] = $pv_row['product_version_id'];
}
if (!count($pv_ids)) {
print('--- ERROR: no versions found in DB for '.$prdverdisplay.'!'."\n");
continue;
}
$throttle_ids = array();
if ($rep['product'] == 'Firefox') {
$throttle_query =
'SELECT product_version_id '
.'FROM product_versions '
."WHERE build_type = 'Release' AND product_name = '".$rep['product']."'"
.(strlen($ver)
?' AND release_version '.(isset($rep['version_regex'])
?"~ '^".$rep['version_regex']."$'"
:"= '".$ver."'")
:'')
.(strlen($channel)?" AND build_type = '".ucfirst($channel)."'":'')
.';';
$throttle_result = pg_query($db_conn, $throttle_query);
if ($throttle_result) {
while ($throttle_row = pg_fetch_array($throttle_result)) {
$throttle_ids[] = $throttle_row['product_version_id'];
}
}
}
if (!$rep['fake_adu']) {
$first_day = date('Y-m-d', strtotime(date('Y-m-d', $curtime).' -'.($backlog_days + 1).' day'));
$adu_query =
'SELECT SUM('.(count($throttle_ids)?'CASE
WHEN product_version_id IN ('.implode(',', $throttle_ids).')
THEN adu_count / 10 ELSE adu_count END':'adu_count').') as v_adu,
SUM(adu_count) as adu, adu_date '
.'FROM product_adu '
.'WHERE product_version_id IN ('.implode(',', $pv_ids).') '
." AND adu_date >= '".$first_day."' "
.'GROUP BY adu_date '
.'ORDER BY adu_date ASC;';
$adu_result = pg_query($db_conn, $adu_query);
if (!$adu_result) {
print('--- ERROR: ADU query failed!'."\n");
}
while ($adu_row = pg_fetch_array($adu_result)) {
$adu[$adu_row['adu_date']] = $adu_row['adu'];
$virtual_adu[$adu_row['adu_date']] = $adu_row['v_adu'];
}
}
for ($daysback = $backlog_days + 1; $daysback > 0; $daysback--) {
$anatime = strtotime(date('Y-m-d', $curtime).' -'.$daysback.' day');
$anadir = date('Y-m-d', $anatime);
print('Explosiveness: Looking at '.$prdverdisplay.' data for '.$anadir."\n");
if (!file_exists($anadir)) { mkdir($anadir); }
$fsigcnt = $prdvershort.'-sigcount.csv';
$ftotal = $prdvershort.'-total.csv';
$fadu = $prdvershort.'-adu.csv';
$fexpdata = $prdvershort.'-expdata.json';
$fpages = 'pages.json';
$fweb = $anadir.'.'.$prdverfile.'.explosiveness.html';
if (!array_key_exists($anadir, $adu) && $rep['fake_adu']) {
$adu[$anadir] = 1000000;
$virtual_adu[$anadir] = 1000000;
}
$rep_query =
'SELECT COUNT(*) as cnt, signature '
.'FROM reports_clean LEFT JOIN signatures'
.' ON (reports_clean.signature_id=signatures.signature_id) '
.'WHERE product_version_id IN ('.implode(',', $pv_ids).') '
." AND utc_day_is(date_processed, '".$anadir."')"
.'GROUP BY signature '
.'ORDER BY cnt DESC;';
$rep_result = pg_query($db_conn, $rep_query);
if (!$rep_result) {
print('--- ERROR: Reports/signatures query failed!'."\n");
}
$sigcnt[$anadir] = pg_num_rows($rep_result);
$total[$anadir] = 0;
$sigs = array();
$tcranks = array();
$tcrank = 1;
while ($rep_row = pg_fetch_array($rep_result)) {
$sig = $rep_row['signature'];
$sigidx = md5($sig);
$sigs[$sigidx] = $sig;
$crdata[$sigidx][$anadir] = $rep_row['cnt'];
$total[$anadir] += $rep_row['cnt'];
$tcranks[$sigidx] = $tcrank++;
}
// Save total crash count (if needed).
$anaftotal = $anadir.'/'.$ftotal;
if (!file_exists($anaftotal)) {
print('Saving total crash count'."\n");
file_put_contents($anaftotal, $total[$anadir]);
}
// Save signature count (if needed).
$anafsigcnt = $anadir.'/'.$fsigcnt;
if (!file_exists($anafsigcnt)) {
print('Saving signature count'."\n");
file_put_contents($anafsigcnt, $sigcnt[$anadir]);
}
// Save ADUs (if needed).
$anafadu = $anadir.'/'.$fadu;
if (intval(@$adu[$anadir]) && !$rep['fake_adu'] &&
(!file_exists($anafadu) || !filesize($anafadu))) {
print('Saving ADU count'."\n");
file_put_contents($anafadu, $adu[$anadir]);
}
// get explosiveness
if (intval(@$virtual_adu[$anadir]) && intval(@$total[$anadir]) &&
($daysback < $backlog_days - 8)) {
$anafexpdata = $anadir.'/'.$fexpdata;
if (!file_exists($anafexpdata)) {
// get topcrasher list with counts per signature
print('Calculating explosiveness'."\n");
$exp = array();
$dayset = array($anadir);
$aduset = array($virtual_adu[$anadir]);
$totalset = array($total[$anadir] / $virtual_adu[$anadir]);
for ($i = 1; $i < 11; $i++) {
$prevdir = date('Y-m-d',
strtotime(date('Y-m-d', $anatime).' -'.$i.' day'));
$dayset[] = $prevdir;
$aduset[] = array_key_exists($prevdir, $virtual_adu) ? $virtual_adu[$prevdir] : 0;
$totalset[] = array_key_exists($prevdir, $virtual_adu) ?
$total[$prevdir] / $virtual_adu[$prevdir] :
0;
}
$exp_total = get_explosiveness($totalset, $aduset, $exp_vars);
$exp_total['dataset'] = $totalset;
// loop over signatures over a certain threshold
foreach ($sigs as $sigidx=>$sig) {
if (intval(@$crdata[$sigidx][$anadir]) > $rep['mincount']) {
$dataset = array($crdata[$sigidx][$anadir] / $virtual_adu[$anadir]);
$rawcountset = array($crdata[$sigidx][$anadir]);
// get crash counts for previous days if not yet in the array
for ($i = 1; $i < 11; $i++) {
$dataset[] = array_key_exists($dayset[$i], $virtual_adu) ?
intval(@$crdata[$sigidx][$dayset[$i]]) /
$virtual_adu[$dayset[$i]] :
0;
$rawcountset[] = intval(@$crdata[$sigidx][$dayset[$i]]);
}
// Fetch bugs associated with that signature.
$bugs = array();
$bug_query =
'SELECT bug_id, status, resolution, short_desc '
.'FROM bug_associations LEFT JOIN bugs'
.' ON (bug_associations.bug_id=bugs.id) '
."WHERE signature = '".pg_escape_string($sig)."';";
$bug_result = pg_query($db_conn, $bug_query);
if (!$bug_result) {
print('--- ERROR: Bug associations query failed!'."\n");
}
while ($bug_row = pg_fetch_array($bug_result)) {
$bugs[$bug_row['bug_id']] = array('status' => $bug_row['status'],
'resolution' => $bug_row['resolution'],
'short_desc' => $bug_row['short_desc']);
}
// Now that we have the data, calculate explosiveness!
$exp[$sigidx] = get_explosiveness($dataset, $aduset, $exp_vars);
$exp[$sigidx]['sig'] = $sig;
$exp[$sigidx]['bugs'] = $bugs;
$exp[$sigidx]['dataset'] = $dataset;
$exp[$sigidx]['rawcountset'] = $rawcountset;
$exp[$sigidx]['tcrank'] = $tcranks[$sigidx];
print('.');
}
}
print("\n");
uasort($exp, 'expmax_compare'); // sort by max, highest-first
file_put_contents($anafexpdata,
json_encode(array('exp'=>$exp,
'exp_total'=> $exp_total,
'dayset'=> $dayset)));
}
else {
print('Reading stored explosiveness'."\n");
$edata = json_decode(file_get_contents($anafexpdata), true);
$exp = $edata['exp'];
$exp_total = $edata['exp_total'];
$dayset = $edata['dayset'];
}
$anafweb = $anadir.'/'.$fweb;
if (!file_exists($anafweb)) {
// create out an HTML page
print('Writing HTML output'."\n");
$doc = new DOMDocument('1.0', 'utf-8');
$doc->formatOutput = true; // we want a nice output
$root = $doc->appendChild($doc->createElement('html'));
$head = $root->appendChild($doc->createElement('head'));
$title = $head->appendChild($doc->createElement('title',
$anadir.' '.$prdverdisplay.' Explosiveness Report'));
$style = $head->appendChild($doc->createElement('style'));
$style->setAttribute('type', 'text/css');
$style->appendChild($doc->createCDATASection(
'.num {'."\n"
.' text-align: right;'."\n"
.'}'."\n"
.'.datelabel,'."\n"
.'.sig {'."\n"
.' font-size: small;'."\n"
.'}'."\n"
.'.bug {'."\n"
.' font-size: small;'."\n"
.' empty-cells: show;'."\n"
.'}'."\n"
.'.resolved {'."\n"
.' text-decoration: line-through;'."\n"
.'}'."\n"
.'.explosive1 > .totallabel,'."\n"
.'.explosive3 > .totallabel,'."\n"
.'.explosive1 > .sig,'."\n"
.'.explosive3 > .sig {'."\n"
.' font-weight: bold;'."\n"
.'}'."\n"
.'.explosive1 > .exp1,'."\n"
.'.explosive3 > .exp3 {'."\n"
.' font-weight: bold;'."\n"
.' color: red;'."\n"
.'}'."\n"
));
$body = $root->appendChild($doc->createElement('body'));
$h1 = $body->appendChild($doc->createElement('h1',
$anadir.' '.$prdverdisplay.' Explosiveness Report'));
// description
$para = $body->appendChild($doc->createElement('p',
'All signatures with more than '.$rep['mincount']
.' crashes on '.$prdverdisplay.'*,'
.' ordered by explosiveness (max of the two values),'
.' with topcrash rank noted.'));
$para->appendChild($doc->createElement('br'));
$para->appendChild($doc->createTextNode('See the '));
$link = $para->appendChild($doc->createElement('a',
'explosiveness wiki page'));
$link->setAttribute('href', $url_algolink);
$para->appendChild($doc->createTextNode(
' for more information on the algorithm used.'));
$table = $body->appendChild($doc->createElement('table'));
$table->setAttribute('border', '1');
// table head
$tr = $table->appendChild($doc->createElement('tr'));
$th = $tr->appendChild($doc->createElement('th', 'TC #'));
$th->setAttribute('title', 'top-crash rank');
$th->setAttribute('rowspan', '2');
$th = $tr->appendChild($doc->createElement('th', 'Signature'));
$th->setAttribute('rowspan', '2');
$th = $tr->appendChild($doc->createElement('th', 'Bug(s)'));
$th->setAttribute('rowspan', '2');
$th = $tr->appendChild($doc->createElement('th', 'Explosiveness'));
$th->setAttribute('colspan', '2');
$th = $tr->appendChild($doc->createElement('th',
'Data (total crashes'.($rep['fake_adu']?'':' / 1M ADU').')'));
$th->setAttribute('colspan', '11');
$tr = $table->appendChild($doc->createElement('tr'));
$th = $tr->appendChild($doc->createElement('th', '1-day'));
$th = $tr->appendChild($doc->createElement('th', '3-day'));
for ($i = 0; $i < 11; $i++) {
$th = $tr->appendChild($doc->createElement('th', $dayset[$i]));
$th->setAttribute('class', 'datelabel');
}
// total crashes row
$tr = $table->appendChild($doc->createElement('tr'));
$classes = array();
if ($exp_total['warn_1']) { $classes[] = 'explosive1'; }
if ($exp_total['warn_3']) { $classes[] = 'explosive3'; }
if (count($classes)) {
$tr->setAttribute('class', implode(' ', $classes));
}
$td = $tr->appendChild($doc->createElement('td', 'Total crashes'));
$td->setAttribute('colspan', '3');
$td->setAttribute('class', 'totallabel');
$td = $tr->appendChild($doc->createElement('td',
sprintf('%.1f', $exp_total['explosiveness_1'])));
$td->setAttribute('class', 'num exp1');
$td = $tr->appendChild($doc->createElement('td',
sprintf('%.1f', $exp_total['explosiveness_3'])));
$td->setAttribute('class', 'num exp3');
foreach ($exp_total['dataset'] as $i=>$c_per_adu) {
$td = $tr->appendChild($doc->createElement('td',
sprintf($rep['fake_adu']?'%d':'%.3f', $c_per_adu * pow(10, 6))));
$td->setAttribute('class', 'num');
if (!$rep['fake_adu']) {
$td->appendChild($doc->createElement('br'));
$td->appendChild($doc->createElement('small',
'('.formatValue(@$total[$dayset[$i]], null, 'kMG').'/'
.formatValue(@$adu[$dayset[$i]], null, 'kMG').')'));
}
}
// signatures rows
foreach ($exp as $expdata) {
$tr = $table->appendChild($doc->createElement('tr'));
$classes = array();
if ($expdata['warn_1']) { $classes[] = 'explosive1'; }
if ($expdata['warn_3']) { $classes[] = 'explosive3'; }
if (count($classes)) {
$tr->setAttribute('class', implode(' ', $classes));
}
$td = $tr->appendChild($doc->createElement('td', $expdata['tcrank']));
$td->setAttribute('class', 'num');
$td = $tr->appendChild($doc->createElement('td'));
$td->setAttribute('class', 'sig');
if (!strlen($expdata['sig'])) {
$link = $td->appendChild($doc->createElement('a', '(empty signature)'));
$link->setAttribute('href', $url_nullsiglink);
}
elseif ($expdata['sig'] == '\N') {
$td->appendChild($doc->createTextNode('(processing failure - "'.$expdata['sig'].'")'));
}
else {
// common case, useful signature
$link = $td->appendChild($doc->createElement('a',
htmlentities($expdata['sig'], ENT_COMPAT, 'UTF-8')));
$link->setAttribute('href', $url_siglinkbase.rawurlencode($expdata['sig']));
}
$td = $tr->appendChild($doc->createElement('td'));
if (array_key_exists('bugs', $expdata) && count($expdata['bugs'])) {
foreach ($expdata['bugs'] as $bug => $bugdata) {
if (strlen($td->textContent)) {
$td->appendChild($doc->createTextNode(', '));
}
$link = $td->appendChild($doc->createElement('a', $bug));
$link->setAttribute('href', $url_buglinkbase.$bug);
$link->setAttribute('title',
$bugdata['status'].' '.$bugdata['resolution'].' - '
.htmlentities($bugdata['short_desc'], ENT_COMPAT, 'UTF-8'));
if ($bugdata['status'] == 'RESOLVED' || $bugdata['status'] == 'VERIFIED') {
$link->setAttribute('class', 'bug resolved');
}
else {
$link->setAttribute('class', 'bug');
}
}
}
else {
$td->appendChild($doc->createTextNode('-'));
}
$td = $tr->appendChild($doc->createElement('td',
sprintf('%.1f', $expdata['explosiveness_1'])));
$td->setAttribute('class', 'num exp1');
$td = $tr->appendChild($doc->createElement('td',
sprintf('%.1f', $expdata['explosiveness_3'])));
$td->setAttribute('class', 'num exp3');
foreach ($expdata['dataset'] as $idx=>$c_per_adu) {
$td = $tr->appendChild($doc->createElement('td',
sprintf($rep['fake_adu']?'%d':'%.3f', $c_per_adu * pow(10,6))));
$td->setAttribute('class', 'num');
$td->setAttribute('title', $expdata['rawcountset'][$idx].' crashes');
}
}
$doc->saveHTMLFile($anafweb);
// add the page to the pages index
$anafpages = $anadir.'/'.$fpages;
if (file_exists($anafpages)) {
$pages = json_decode(file_get_contents($anafpages), true);
}
else {
$pages = array();
}
$pages[$fweb] =
array('product' => $rep['product'],
'channel' => $channel,
'version' => $ver,
'report' => 'explosive',
'report_sub' => null,
'display_ver' => $prdverdisplay,
'display_rep' => 'Explosiveness Report');
file_put_contents($anafpages, json_encode($pages));
}
}
elseif (!intval(@$total[$anadir])) {
print('--- ERROR: No ADU data found for '.$anadir.' and '.$prdverdisplay.'!'."\n");
}
elseif (!intval(@$virtual_adu[$anadir])) {
print('--- ERROR: No ADU data found for '.$anadir.' and '.$prdverdisplay.'!'."\n");
}
}
print("\n");
}
// *** helper functions ***
// Function to calculate explosiveness values
function get_explosiveness($dataset, $aduset, $exp_vars) {
$exp_out = array();
$baseset_1 = array_slice($dataset, 1, 10);
$avgADU_1 = max(arr_mean(array_slice($aduset, 1, 10)), 1);
$base_1 = arr_mean($baseset_1);
// maximum of the clamp/ADU and the distance of the max value to the mean
$dist_1 = max($exp_vars['clamp_1'] / $avgADU_1, max($baseset_1) - $base_1);
$data_1 = $dataset[0];
$exp_out['explosiveness_1'] = ($data_1 - $base_1) / $dist_1;
$exp_out['warn_1'] = ($exp_out['explosiveness_1'] > $exp_vars['limit_1']);
$baseset_3 = array_slice($dataset, 3, 10);
$avgADU_3 = max(arr_mean(array_slice($aduset, 3, 10)), 1);
$base_3 = arr_mean($baseset_3);
// maximum of the clamp/ADU and the standard deviation of the mean
$dist_3 = max($exp_vars['clamp_3'] / $avgADU_3, arr_stddev($baseset_3, $base_3));
$data_3 = arr_mean(array_slice($dataset, 0, 3));
$exp_out['explosiveness_3'] = ($data_3 - $base_3) / $dist_3;
$exp_out['warn_3'] = ($exp_out['explosiveness_3'] > $exp_vars['limit_3']);
$exp_out['exp_max'] = max($exp_out['explosiveness_1'],
$exp_out['explosiveness_3']);
return $exp_out;
}
// Comparison function using ex_max member (reverse sort!)
function expmax_compare($a, $b) {
if ($a['exp_max'] == $b['exp_max']) { return 0; }
return ($a['exp_max'] > $b['exp_max']) ? -1 : 1;
}
?>