1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
* @category Piwik
* @package Piwik
*/
namespace Piwik;
/**
* Class SettingsServer holds the logic related to reading server/php settings
*
* @package Piwik
*/
class SettingsServer
{
/**
* Is the current script execution triggered by misc/cron/archive.php ?
*
* Helpful for error handling: directly throw error without HTML (eg. when DB is down)
* @return bool
*/
public static function isArchivePhpTriggered()
{
return !empty($_GET['trigger'])
&& $_GET['trigger'] == 'archivephp';
}
/**
* Returns true if PHP was invoked from command-line interface (shell)
*
* @since added in 0.4.4
* @return bool true if PHP invoked as a CGI or from CLI
*/
public static function isPhpCliMode()
{
$remoteAddr = @$_SERVER['REMOTE_ADDR'];
return PHP_SAPI == 'cli' ||
(!strncmp(PHP_SAPI, 'cgi', 3) && empty($remoteAddr));
}
/**
* Returns true if running on Microsoft IIS 7 (or above)
*
* @return bool
*/
public static function isIIS()
{
$iis = isset($_SERVER['SERVER_SOFTWARE']) &&
preg_match('/^Microsoft-IIS\/(.+)/', $_SERVER['SERVER_SOFTWARE'], $matches) &&
version_compare($matches[1], '7') >= 0;
return $iis;
}
/**
* Returns true if running on an Apache web server
*
* @return bool
*/
public static function isApache()
{
$apache = isset($_SERVER['SERVER_SOFTWARE']) &&
!strncmp($_SERVER['SERVER_SOFTWARE'], 'Apache', 6);
return $apache;
}
/**
* Returns true if running on a Windows operating system
*
* @since 0.6.5
* @return bool true if PHP detects it is running on Windows; else false
*/
public static function isWindows()
{
return DIRECTORY_SEPARATOR === '\\';
}
/**
* Determine if this php version/build supports timezone manipulation
* (e.g., php >= 5.2, or compiled with EXPERIMENTAL_DATE_SUPPORT=1 for
* php < 5.2).
*
* @return bool True if timezones supported; false otherwise
*/
public static function isTimezoneSupportEnabled()
{
return
function_exists('date_create') &&
function_exists('date_default_timezone_set') &&
function_exists('timezone_identifiers_list') &&
function_exists('timezone_open') &&
function_exists('timezone_offset_get');
}
/**
* Is GD php extension (sparklines, graphs) available?
*
* @return bool
*/
public static function isGdExtensionEnabled()
{
static $gd = null;
if (is_null($gd)) {
$extensions = @get_loaded_extensions();
$gd = in_array('gd', $extensions) && function_exists('imageftbbox');
}
return $gd;
}
/**
* Raise PHP memory limit if below the minimum required
*
* @return bool true if set; false otherwise
*/
public static function raiseMemoryLimitIfNecessary()
{
$memoryLimit = self::getMemoryLimitValue();
if ($memoryLimit === false) {
return false;
}
$minimumMemoryLimit = Config::getInstance()->General['minimum_memory_limit'];
if (self::isArchivePhpTriggered()
&& Piwik::isUserIsSuperUser()
) {
// archive.php: no time limit, high memory limit
self::setMaxExecutionTime(0);
$minimumMemoryLimitWhenArchiving = Config::getInstance()->General['minimum_memory_limit_when_archiving'];
if ($memoryLimit < $minimumMemoryLimitWhenArchiving) {
return self::setMemoryLimit($minimumMemoryLimitWhenArchiving);
}
return false;
}
if ($memoryLimit < $minimumMemoryLimit) {
return self::setMemoryLimit($minimumMemoryLimit);
}
return false;
}
/**
* Set PHP memory limit
*
* Note: system settings may prevent scripts from overriding the master value
*
* @param int $minimumMemoryLimit
* @return bool true if set; false otherwise
*/
protected static function setMemoryLimit($minimumMemoryLimit)
{
// in Megabytes
$currentValue = self::getMemoryLimitValue();
if ($currentValue === false
|| ($currentValue < $minimumMemoryLimit && @ini_set('memory_limit', $minimumMemoryLimit . 'M'))
) {
return true;
}
return false;
}
/**
* Get php memory_limit (in Megabytes)
*
* Prior to PHP 5.2.1, or on Windows, --enable-memory-limit is not a
* compile-time default, so ini_get('memory_limit') may return false.
*
* @see http://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
* @return int|bool memory limit in megabytes, or false if there is no limit
*/
public static function getMemoryLimitValue()
{
if (($memory = ini_get('memory_limit')) > 0) {
// handle shorthand byte options (case-insensitive)
$shorthandByteOption = substr($memory, -1);
switch ($shorthandByteOption) {
case 'G':
case 'g':
return substr($memory, 0, -1) * 1024;
case 'M':
case 'm':
return substr($memory, 0, -1);
case 'K':
case 'k':
return substr($memory, 0, -1) / 1024;
}
return $memory / 1048576;
}
// no memory limit
return false;
}
/**
* Set maximum script execution time.
*
* @param int $executionTime max execution time in seconds (0 = no limit)
*/
public static function setMaxExecutionTime($executionTime)
{
// in the event one or the other is disabled...
@ini_set('max_execution_time', $executionTime);
@set_time_limit($executionTime);
}
}
|
