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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
################
User Agent Class
################
The User Agent Class provides functions that help identify information
about the browser, mobile device, or robot visiting your site. In
addition you can get referrer information as well as language and
supported character-set information.
.. contents::
:local:
.. raw:: html
<div class="custom-index container"></div>
**************************
Using the User Agent Class
**************************
Initializing the Class
======================
Like most other classes in CodeIgniter, the User Agent class is
initialized in your controller using the $this->load->library function::
$this->load->library('user_agent');
Once loaded, the object will be available using: ``$this->agent``
User Agent Definitions
======================
The user agent name definitions are located in a config file located at:
application/config/user_agents.php. You may add items to the various
user agent arrays if needed.
Example
=======
When the User Agent class is initialized it will attempt to determine
whether the user agent browsing your site is a web browser, a mobile
device, or a robot. It will also gather the platform information if it
is available.
::
$this->load->library('user_agent');
if ($this->agent->is_browser())
{
$agent = $this->agent->browser().' '.$this->agent->version();
}
elseif ($this->agent->is_robot())
{
$agent = $this->agent->robot();
}
elseif ($this->agent->is_mobile())
{
$agent = $this->agent->mobile();
}
else
{
$agent = 'Unidentified User Agent';
}
echo $agent;
echo $this->agent->platform(); // Platform info (Windows, Linux, Mac, etc.)
***************
Class Reference
***************
.. class:: CI_User_agent
.. method:: is_browser([$key = NULL])
:param string $key: Optional browser name
:returns: TRUE if the user agent is a (specified) browser, FALSE if not
:rtype: bool
Returns TRUE/FALSE (boolean) if the user agent is a known web browser.
::
if ($this->agent->is_browser('Safari'))
{
echo 'You are using Safari.';
}
elseif ($this->agent->is_browser())
{
echo 'You are using a browser.';
}
.. note:: The string "Safari" in this example is an array key in the list of browser definitions.
You can find this list in **application/config/user_agents.php** if you want to add new
browsers or change the stings.
.. method:: is_mobile([$key = NULL])
:param string $key: Optional mobile device name
:returns: TRUE if the user agent is a (specified) mobile device, FALSE if not
:rtype: bool
Returns TRUE/FALSE (boolean) if the user agent is a known mobile device.
::
if ($this->agent->is_mobile('iphone'))
{
$this->load->view('iphone/home');
}
elseif ($this->agent->is_mobile())
{
$this->load->view('mobile/home');
}
else
{
$this->load->view('web/home');
}
.. method:: is_robot([$key = NULL])
:param string $key: Optional robot name
:returns: TRUE if the user agent is a (specified) robot, FALSE if not
:rtype: bool
Returns TRUE/FALSE (boolean) if the user agent is a known robot.
.. note:: The user agent library only contains the most common robot definitions. It is not a complete list of bots.
There are hundreds of them so searching for each one would not be very efficient. If you find that some bots
that commonly visit your site are missing from the list you can add them to your
**application/config/user_agents.php** file.
.. method:: is_referral()
:returns: TRUE if the user agent is a referral, FALSE if not
:rtype: bool
Returns TRUE/FALSE (boolean) if the user agent was referred from another site.
.. method:: browser()
:returns: Detected browser or an empty string
:rtype: string
Returns a string containing the name of the web browser viewing your site.
.. method:: version()
:returns: Detected browser version or an empty string
:rtype: string
Returns a string containing the version number of the web browser viewing your site.
.. method:: mobile()
:returns: Detected mobile device brand or an empty string
:rtype: string
Returns a string containing the name of the mobile device viewing your site.
.. method:: robot()
:returns: Detected robot name or an empty string
:rtype: string
Returns a string containing the name of the robot viewing your site.
.. method:: platform()
:returns: Detected operating system or an empty string
:rtype: string
Returns a string containing the platform viewing your site (Linux, Windows, OS X, etc.).
.. method:: referrer()
:returns: Detected referrer or an empty string
:rtype: string
The referrer, if the user agent was referred from another site. Typically you'll test for this as follows::
if ($this->agent->is_referral())
{
echo $this->agent->referrer();
}
.. method:: agent_string()
:returns: Full user agent string or an empty string
:rtype: string
Returns a string containing the full user agent string. Typically it will be something like this::
Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.0.4) Gecko/20060613 Camino/1.0.2
.. method:: accept_lang([$lang = 'en'])
:param string $lang: Language key
:returns: TRUE if provided language is accepted, FALSE if not
:rtype: bool
Lets you determine if the user agent accepts a particular language. Example::
if ($this->agent->accept_lang('en'))
{
echo 'You accept English!';
}
.. note:: This method is not typically very reliable since some browsers do not provide language info,
and even among those that do, it is not always accurate.
.. method:: languages()
:returns: An array list of accepted languages
:rtype: array
Returns an array of languages supported by the user agent.
.. method:: accept_charset([$charset = 'utf-8'])
:param string $charset: Character set
:returns: TRUE if the character set is accepted, FALSE if not
:rtype: bool
Lets you determine if the user agent accepts a particular character set. Example::
if ($this->agent->accept_charset('utf-8'))
{
echo 'You browser supports UTF-8!';
}
.. note:: This method is not typically very reliable since some browsers do not provide character-set info,
and even among those that do, it is not always accurate.
.. method:: charsets()
:returns: An array list of accepted character sets
:rtype: array
Returns an array of character sets accepted by the user agent.
.. method:: parse($string)
:param string $string: A custom user-agent string
:rtype: void
Parses a custom user-agent string, different from the one reported by the current visitor.
|
