]>
Commit | Line | Data |
---|---|---|
59c06b17 CS |
1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
2 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> | |
3 | <head> | |
4 | ||
5 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
6 | <title>File Uploading Class : CodeIgniter User Guide</title> | |
7 | ||
8 | <style type='text/css' media='all'>@import url('../userguide.css');</style> | |
9 | <link rel='stylesheet' type='text/css' media='all' href='../userguide.css' /> | |
10 | ||
11 | <script type="text/javascript" src="../nav/nav.js"></script> | |
12 | <script type="text/javascript" src="../nav/prototype.lite.js"></script> | |
13 | <script type="text/javascript" src="../nav/moo.fx.js"></script> | |
14 | <script type="text/javascript" src="../nav/user_guide_menu.js"></script> | |
15 | ||
16 | <meta http-equiv='expires' content='-1' /> | |
17 | <meta http-equiv= 'pragma' content='no-cache' /> | |
18 | <meta name='robots' content='all' /> | |
19 | <meta name='author' content='ExpressionEngine Dev Team' /> | |
20 | <meta name='description' content='CodeIgniter User Guide' /> | |
21 | ||
22 | </head> | |
23 | <body> | |
24 | ||
25 | <!-- START NAVIGATION --> | |
26 | <div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div> | |
27 | <div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div> | |
28 | <div id="masthead"> | |
29 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%"> | |
30 | <tr> | |
31 | <td><h1>CodeIgniter User Guide Version 2.1.3</h1></td> | |
32 | <td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td> | |
33 | </tr> | |
34 | </table> | |
35 | </div> | |
36 | <!-- END NAVIGATION --> | |
37 | ||
38 | ||
39 | <!-- START BREADCRUMB --> | |
40 | <table cellpadding="0" cellspacing="0" border="0" style="width:100%"> | |
41 | <tr> | |
42 | <td id="breadcrumb"> | |
43 | <a href="http://codeigniter.com/">CodeIgniter Home</a> › | |
44 | <a href="../index.html">User Guide Home</a> › | |
45 | File Uploading Class | |
46 | </td> | |
47 | <td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td> | |
48 | </tr> | |
49 | </table> | |
50 | <!-- END BREADCRUMB --> | |
51 | ||
52 | <br clear="all" /> | |
53 | ||
54 | ||
55 | <!-- START CONTENT --> | |
56 | <div id="content"> | |
57 | ||
58 | ||
59 | <h1>File Uploading Class</h1> | |
60 | ||
61 | <p>CodeIgniter's File Uploading Class permits files to be uploaded. You can set various | |
62 | preferences, restricting the type and size of the files.</p> | |
63 | ||
64 | ||
65 | <h2>The Process</h2> | |
66 | ||
67 | <p>Uploading a file involves the following general process:</p> | |
68 | ||
69 | ||
70 | <ul> | |
71 | <li>An upload form is displayed, allowing a user to select a file and upload it.</li> | |
72 | <li>When the form is submitted, the file is uploaded to the destination you specify.</li> | |
73 | <li>Along the way, the file is validated to make sure it is allowed to be uploaded based on the preferences you set.</li> | |
74 | <li>Once uploaded, the user will be shown a success message.</li> | |
75 | </ul> | |
76 | ||
77 | <p>To demonstrate this process here is brief tutorial. Afterward you'll find reference information.</p> | |
78 | ||
79 | <h2>Creating the Upload Form</h2> | |
80 | ||
81 | ||
82 | ||
83 | <p>Using a text editor, create a form called <dfn>upload_form.php</dfn>. In it, place this code and save it to your <samp>applications/views/</samp> | |
84 | folder:</p> | |
85 | ||
86 | ||
87 | <textarea class="textarea" style="width:100%" cols="50" rows="23"> | |
88 | <html> | |
89 | <head> | |
90 | <title>Upload Form</title> | |
91 | </head> | |
92 | <body> | |
93 | ||
94 | <?php echo $error;?> | |
95 | ||
96 | <?php echo form_open_multipart('upload/do_upload');?> | |
97 | ||
98 | <input type="file" name="userfile" size="20" /> | |
99 | ||
100 | <br /><br /> | |
101 | ||
102 | <input type="submit" value="upload" /> | |
103 | ||
104 | </form> | |
105 | ||
106 | </body> | |
107 | </html></textarea> | |
108 | ||
109 | <p>You'll notice we are using a form helper to create the opening form tag. File uploads require a multipart form, so the helper | |
110 | creates the proper syntax for you. You'll also notice we have an $error variable. This is so we can show error messages in the event | |
111 | the user does something wrong.</p> | |
112 | ||
113 | ||
114 | <h2>The Success Page</h2> | |
115 | ||
116 | <p>Using a text editor, create a form called <dfn>upload_success.php</dfn>. | |
117 | In it, place this code and save it to your <samp>applications/views/</samp> folder:</p> | |
118 | ||
119 | <textarea class="textarea" style="width:100%" cols="50" rows="20"><html> | |
120 | <head> | |
121 | <title>Upload Form</title> | |
122 | </head> | |
123 | <body> | |
124 | ||
125 | <h3>Your file was successfully uploaded!</h3> | |
126 | ||
127 | <ul> | |
128 | <?php foreach ($upload_data as $item => $value):?> | |
129 | <li><?php echo $item;?>: <?php echo $value;?></li> | |
130 | <?php endforeach; ?> | |
131 | </ul> | |
132 | ||
133 | <p><?php echo anchor('upload', 'Upload Another File!'); ?></p> | |
134 | ||
135 | </body> | |
136 | </html></textarea> | |
137 | ||
138 | ||
139 | <h2>The Controller</h2> | |
140 | ||
141 | <p>Using a text editor, create a controller called <dfn>upload.php</dfn>. In it, place this code and save it to your <samp>applications/controllers/</samp> | |
142 | folder:</p> | |
143 | ||
144 | ||
145 | <textarea class="textarea" style="width:100%" cols="50" rows="43"><?php | |
146 | ||
147 | class Upload extends CI_Controller { | |
148 | ||
149 | function __construct() | |
150 | { | |
151 | parent::__construct(); | |
152 | $this->load->helper(array('form', 'url')); | |
153 | } | |
154 | ||
155 | function index() | |
156 | { | |
157 | $this->load->view('upload_form', array('error' => ' ' )); | |
158 | } | |
159 | ||
160 | function do_upload() | |
161 | { | |
162 | $config['upload_path'] = './uploads/'; | |
163 | $config['allowed_types'] = 'gif|jpg|png'; | |
164 | $config['max_size'] = '100'; | |
165 | $config['max_width'] = '1024'; | |
166 | $config['max_height'] = '768'; | |
167 | ||
168 | $this->load->library('upload', $config); | |
169 | ||
170 | if ( ! $this->upload->do_upload()) | |
171 | { | |
172 | $error = array('error' => $this->upload->display_errors()); | |
173 | ||
174 | $this->load->view('upload_form', $error); | |
175 | } | |
176 | else | |
177 | { | |
178 | $data = array('upload_data' => $this->upload->data()); | |
179 | ||
180 | $this->load->view('upload_success', $data); | |
181 | } | |
182 | } | |
183 | } | |
184 | ?></textarea> | |
185 | ||
186 | ||
187 | <h2>The Upload Folder</h2> | |
188 | ||
189 | <p>You'll need a destination folder for your uploaded images. Create a folder at the root of your CodeIgniter installation called | |
190 | <dfn>uploads</dfn> and set its file permissions to 777.</p> | |
191 | ||
192 | ||
193 | <h2>Try it!</h2> | |
194 | ||
195 | <p>To try your form, visit your site using a URL similar to this one:</p> | |
196 | ||
197 | <code>example.com/index.php/<var>upload</var>/</code> | |
198 | ||
199 | <p>You should see an upload form. Try uploading an image file (either a jpg, gif, or png). If the path in your | |
200 | controller is correct it should work.</p> | |
201 | ||
202 | ||
203 | <p> </p> | |
204 | ||
205 | <h1>Reference Guide</h1> | |
206 | ||
207 | ||
208 | <h2>Initializing the Upload Class</h2> | |
209 | ||
210 | <p>Like most other classes in CodeIgniter, the Upload class is initialized in your controller using the <dfn>$this->load->library</dfn> function:</p> | |
211 | ||
212 | <code>$this->load->library('upload');</code> | |
213 | <p>Once the Upload class is loaded, the object will be available using: <dfn>$this->upload</dfn></p> | |
214 | ||
215 | ||
216 | <h2>Setting Preferences</h2> | |
217 | ||
218 | <p>Similar to other libraries, you'll control what is allowed to be upload based on your preferences. In the controller you | |
219 | built above you set the following preferences:</p> | |
220 | ||
221 | <code>$config['upload_path'] = './uploads/';<br /> | |
222 | $config['allowed_types'] = 'gif|jpg|png';<br /> | |
223 | $config['max_size'] = '100';<br /> | |
224 | $config['max_width'] = '1024';<br /> | |
225 | $config['max_height'] = '768';<br /> | |
226 | <br /> | |
227 | $this->load->library('upload', $config);<br /><br /> | |
228 | ||
229 | // Alternately you can set preferences by calling the initialize function. Useful if you auto-load the class:<br /> | |
230 | $this->upload->initialize($config);</code> | |
231 | ||
232 | <p>The above preferences should be fairly self-explanatory. Below is a table describing all available preferences.</p> | |
233 | ||
234 | ||
235 | <h2>Preferences</h2> | |
236 | ||
237 | <p>The following preferences are available. The default value indicates what will be used if you do not specify that preference.</p> | |
238 | ||
239 | <table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder"> | |
240 | <tr> | |
241 | <th>Preference</th> | |
242 | <th>Default Value</th> | |
243 | <th>Options</th> | |
244 | <th>Description</th> | |
245 | </tr> | |
246 | ||
247 | <tr> | |
248 | <td class="td"><strong>upload_path</strong></td> | |
249 | <td class="td">None</td> | |
250 | <td class="td">None</td> | |
251 | <td class="td">The path to the folder where the upload should be placed. The folder must be writable and the path can be absolute or relative.</td> | |
252 | </tr> | |
253 | ||
254 | <tr> | |
255 | <td class="td"><strong>allowed_types</strong></td> | |
256 | <td class="td">None</td> | |
257 | <td class="td">None</td> | |
258 | <td class="td">The mime types corresponding to the types of files you allow to be uploaded. Usually the file extension can be used as the mime type. Separate multiple types with a pipe.</td> | |
259 | </tr> | |
260 | ||
261 | ||
262 | <tr> | |
263 | <td class="td"><strong>file_name</strong></td> | |
264 | <td class="td">None</td> | |
265 | <td class="td">Desired file name</td> | |
266 | <td class="td"> | |
267 | <p>If set CodeIgniter will rename the uploaded file to this name. The extension provided in the file name must also be an allowed file type.</p> | |
268 | </td> | |
269 | </tr> | |
270 | ||
271 | <tr> | |
272 | <td class="td"><strong>overwrite</strong></td> | |
273 | <td class="td">FALSE</td> | |
274 | <td class="td">TRUE/FALSE (boolean)</td> | |
275 | <td class="td">If set to true, if a file with the same name as the one you are uploading exists, it will be overwritten. If set to false, a number will be appended to the filename if another with the same name exists.</td> | |
276 | </tr> | |
277 | ||
278 | ||
279 | <tr> | |
280 | <td class="td"><strong>max_size</strong></td> | |
281 | <td class="td">0</td> | |
282 | <td class="td">None</td> | |
283 | <td class="td">The maximum size (in kilobytes) that the file can be. Set to zero for no limit. Note: Most PHP installations have their own limit, as specified in the php.ini file. Usually 2 MB (or 2048 KB) by default.</td> | |
284 | </tr> | |
285 | ||
286 | <tr> | |
287 | <td class="td"><strong>max_width</strong></td> | |
288 | <td class="td">0</td> | |
289 | <td class="td">None</td> | |
290 | <td class="td">The maximum width (in pixels) that the file can be. Set to zero for no limit.</td> | |
291 | </tr> | |
292 | ||
293 | <tr> | |
294 | <td class="td"><strong>max_height</strong></td> | |
295 | <td class="td">0</td> | |
296 | <td class="td">None</td> | |
297 | <td class="td">The maximum height (in pixels) that the file can be. Set to zero for no limit.</td> | |
298 | </tr> | |
299 | ||
300 | <tr> | |
301 | <td class="td"><strong>max_filename</strong></td> | |
302 | <td class="td">0</td> | |
303 | <td class="td">None</td> | |
304 | <td class="td">The maximum length that a file name can be. Set to zero for no limit.</td> | |
305 | </tr> | |
306 | ||
307 | <tr> | |
308 | <td class="td"><strong>encrypt_name</strong></td> | |
309 | <td class="td">FALSE</td> | |
310 | <td class="td">TRUE/FALSE (boolean)</td> | |
311 | <td class="td">If set to TRUE the file name will be converted to a random encrypted string. This can be useful if you would like the file saved with a name that can not be discerned by the person uploading it.</td> | |
312 | </tr> | |
313 | ||
314 | <tr> | |
315 | <td class="td"><strong>remove_spaces</strong></td> | |
316 | <td class="td">TRUE</td> | |
317 | <td class="td">TRUE/FALSE (boolean)</td> | |
318 | <td class="td">If set to TRUE, any spaces in the file name will be converted to underscores. This is recommended.</td> | |
319 | </tr> | |
320 | </table> | |
321 | ||
322 | ||
323 | <h2>Setting preferences in a config file</h2> | |
324 | ||
325 | <p>If you prefer not to set preferences using the above method, you can instead put them into a config file. | |
326 | Simply create a new file called the <var>upload.php</var>, add the <var>$config</var> | |
327 | array in that file. Then save the file in: <var>config/upload.php</var> and it will be used automatically. You | |
328 | will NOT need to use the <dfn>$this->upload->initialize</dfn> function if you save your preferences in a config file.</p> | |
329 | ||
330 | ||
331 | <h2>Function Reference</h2> | |
332 | ||
333 | <p>The following functions are available</p> | |
334 | ||
335 | ||
336 | <h2>$this->upload->do_upload()</h2> | |
337 | ||
338 | <p>Performs the upload based on the preferences you've set. Note: By default the upload routine expects the file to come from a form field | |
339 | called <dfn>userfile</dfn>, and the form must be a "multipart type:</p> | |
340 | ||
341 | <code><form method="post" action="some_action" enctype="multipart/form-data" /></code> | |
342 | ||
343 | <p>If you would like to set your own field name simply pass its value to the <dfn>do_upload</dfn> function:</p> | |
344 | ||
345 | <code> | |
346 | $field_name = "some_field_name";<br /> | |
347 | $this->upload->do_upload($field_name)</code> | |
348 | ||
349 | ||
350 | <h2>$this->upload->display_errors()</h2> | |
351 | ||
352 | <p>Retrieves any error messages if the <dfn>do_upload()</dfn> function returned false. The function does not echo automatically, it | |
353 | returns the data so you can assign it however you need.</p> | |
354 | ||
355 | <h3>Formatting Errors</h3> | |
356 | <p>By default the above function wraps any errors within <p> tags. You can set your own delimiters like this:</p> | |
357 | ||
358 | <code>$this->upload->display_errors('<var><p></var>', '<var></p></var>');</code> | |
359 | ||
360 | <h2>$this->upload->data()</h2> | |
361 | ||
362 | <p>This is a helper function that returns an array containing all of the data related to the file you uploaded. | |
363 | Here is the array prototype:</p> | |
364 | ||
365 | <code>Array<br /> | |
366 | (<br /> | |
367 | [file_name] => mypic.jpg<br /> | |
368 | [file_type] => image/jpeg<br /> | |
369 | [file_path] => /path/to/your/upload/<br /> | |
370 | [full_path] => /path/to/your/upload/jpg.jpg<br /> | |
371 | [raw_name] => mypic<br /> | |
372 | [orig_name] => mypic.jpg<br /> | |
373 | [client_name] => mypic.jpg<br /> | |
374 | [file_ext] => .jpg<br /> | |
375 | [file_size] => 22.2<br /> | |
376 | [is_image] => 1<br /> | |
377 | [image_width] => 800<br /> | |
378 | [image_height] => 600<br /> | |
379 | [image_type] => jpeg<br /> | |
380 | [image_size_str] => width="800" height="200"<br /> | |
381 | )</code> | |
382 | ||
383 | <h3>Explanation</h3> | |
384 | ||
385 | <p>Here is an explanation of the above array items.</p> | |
386 | ||
387 | <table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder"> | |
388 | <tr><th>Item</th><th>Description</th></tr> | |
389 | ||
390 | <tr><td class="td"><strong>file_name</strong></td> | |
391 | <td class="td">The name of the file that was uploaded including the file extension.</td></tr> | |
392 | ||
393 | <tr><td class="td"><strong>file_type</strong></td> | |
394 | <td class="td">The file's Mime type</td></tr> | |
395 | ||
396 | <tr><td class="td"><strong>file_path</strong></td> | |
397 | <td class="td">The absolute server path to the file</td></tr> | |
398 | ||
399 | <tr><td class="td"><strong>full_path</strong></td> | |
400 | <td class="td">The absolute server path including the file name</td></tr> | |
401 | ||
402 | <tr><td class="td"><strong>raw_name</strong></td> | |
403 | <td class="td">The file name without the extension</td></tr> | |
404 | ||
405 | <tr><td class="td"><strong>orig_name</strong></td> | |
406 | <td class="td">The original file name. This is only useful if you use the encrypted name option.</td></tr> | |
407 | ||
408 | <tr><td class="td"><strong>client_name</strong></td> | |
409 | <td class="td">The file name as supplied by the client user agent, prior to any file name preparation or incrementing.</td></tr> | |
410 | ||
411 | <tr><td class="td"><strong>file_ext</strong></td> | |
412 | <td class="td">The file extension with period</td></tr> | |
413 | ||
414 | <tr><td class="td"><strong>file_size</strong></td> | |
415 | <td class="td">The file size in kilobytes</td></tr> | |
416 | ||
417 | <tr><td class="td"><strong>is_image</strong></td> | |
418 | <td class="td">Whether the file is an image or not. 1 = image. 0 = not.</td></tr> | |
419 | ||
420 | <tr><td class="td"><strong>image_width</strong></td> | |
421 | <td class="td">Image width.</td></tr> | |
422 | ||
423 | <tr><td class="td"><strong>image_height</strong></td> | |
424 | <td class="td">Image height</td></tr> | |
425 | ||
426 | <tr><td class="td"><strong>image_type</strong></td> | |
427 | <td class="td">Image type. Typically the file extension without the period.</td></tr> | |
428 | ||
429 | <tr><td class="td"><strong>image_size_str</strong></td> | |
430 | <td class="td">A string containing the width and height. Useful to put into an image tag.</td></tr> | |
431 | ||
432 | ||
433 | </table> | |
434 | ||
435 | </div> | |
436 | <!-- END CONTENT --> | |
437 | ||
438 | ||
439 | <div id="footer"> | |
440 | <p> | |
441 | Previous Topic: <a href="encryption.html">Encryption Helper</a> | |
442 | · | |
443 | <a href="#top">Top of Page</a> · | |
444 | <a href="../index.html">User Guide Home</a> · | |
445 | Next Topic: <a href="form_validation.html">Form Validation Class</a> | |
446 | </p> | |
447 | <p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p> | |
448 | </div> | |
449 | ||
450 | </body> | |
451 | </html> |