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- <div class="section" id="file-uploading-class">
- <h1>File Uploading Class<a class="headerlink" href="#file-uploading-class" title="Permalink to this headline">¶</a></h1>
- <p>CodeIgniter’s File Uploading Class permits files to be uploaded. You can
- set various preferences, restricting the type and size of the files.</p>
- <div class="contents local topic" id="contents">
- <ul class="simple">
- <li><a class="reference internal" href="#the-process" id="id1">The Process</a><ul>
- <li><a class="reference internal" href="#creating-the-upload-form" id="id2">Creating the Upload Form</a></li>
- <li><a class="reference internal" href="#the-success-page" id="id3">The Success Page</a></li>
- <li><a class="reference internal" href="#the-controller" id="id4">The Controller</a></li>
- <li><a class="reference internal" href="#the-upload-directory" id="id5">The Upload Directory</a></li>
- <li><a class="reference internal" href="#try-it" id="id6">Try it!</a></li>
- </ul>
- </li>
- <li><a class="reference internal" href="#reference-guide" id="id7">Reference Guide</a><ul>
- <li><a class="reference internal" href="#initializing-the-upload-class" id="id8">Initializing the Upload Class</a></li>
- <li><a class="reference internal" href="#setting-preferences" id="id9">Setting Preferences</a></li>
- <li><a class="reference internal" href="#preferences" id="id10">Preferences</a></li>
- <li><a class="reference internal" href="#setting-preferences-in-a-config-file" id="id11">Setting preferences in a config file</a></li>
- </ul>
- </li>
- <li><a class="reference internal" href="#class-reference" id="id12">Class Reference</a></li>
- </ul>
- </div>
- <div class="custom-index container"></div><div class="section" id="the-process">
- <h2><a class="toc-backref" href="#id1">The Process</a><a class="headerlink" href="#the-process" title="Permalink to this headline">¶</a></h2>
- <p>Uploading a file involves the following general process:</p>
- <ul class="simple">
- <li>An upload form is displayed, allowing a user to select a file and
- upload it.</li>
- <li>When the form is submitted, the file is uploaded to the destination
- you specify.</li>
- <li>Along the way, the file is validated to make sure it is allowed to be
- uploaded based on the preferences you set.</li>
- <li>Once uploaded, the user will be shown a success message.</li>
- </ul>
- <p>To demonstrate this process here is brief tutorial. Afterward you’ll
- find reference information.</p>
- <div class="section" id="creating-the-upload-form">
- <h3><a class="toc-backref" href="#id2">Creating the Upload Form</a><a class="headerlink" href="#creating-the-upload-form" title="Permalink to this headline">¶</a></h3>
- <p>Using a text editor, create a form called upload_form.php. In it, place
- this code and save it to your <strong>application/views/</strong> directory:</p>
- <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">html</span><span class="o">></span>
- <span class="o"><</span><span class="nx">head</span><span class="o">></span>
- <span class="o"><</span><span class="nx">title</span><span class="o">></span><span class="nx">Upload</span> <span class="nx">Form</span><span class="o"></</span><span class="nx">title</span><span class="o">></span>
- <span class="o"></</span><span class="nx">head</span><span class="o">></span>
- <span class="o"><</span><span class="nx">body</span><span class="o">></span>
- <span class="o"><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nv">$error</span><span class="p">;</span><span class="cp">?></span>
- <span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">form_open_multipart</span><span class="p">(</span><span class="s1">'upload/do_upload'</span><span class="p">);</span><span class="cp">?></span>
- <span class="p"><</span><span class="nt">input</span> <span class="na">type</span><span class="o">=</span><span class="s">"file"</span> <span class="na">name</span><span class="o">=</span><span class="s">"userfile"</span> <span class="na">size</span><span class="o">=</span><span class="s">"20"</span> <span class="p">/></span>
- <span class="p"><</span><span class="nt">br</span> <span class="p">/><</span><span class="nt">br</span> <span class="p">/></span>
- <span class="p"><</span><span class="nt">input</span> <span class="na">type</span><span class="o">=</span><span class="s">"submit"</span> <span class="na">value</span><span class="o">=</span><span class="s">"upload"</span> <span class="p">/></span>
- <span class="p"></</span><span class="nt">form</span><span class="p">></span>
- <span class="p"></</span><span class="nt">body</span><span class="p">></span>
- <span class="p"></</span><span class="nt">html</span><span class="p">></span>
- </pre></div>
- </div>
- <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 creates the proper
- syntax for you. You’ll also notice we have an $error variable. This is
- so we can show error messages in the event the user does something
- wrong.</p>
- </div>
- <div class="section" id="the-success-page">
- <h3><a class="toc-backref" href="#id3">The Success Page</a><a class="headerlink" href="#the-success-page" title="Permalink to this headline">¶</a></h3>
- <p>Using a text editor, create a form called upload_success.php. In it,
- place this code and save it to your <strong>application/views/</strong> directory:</p>
- <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">html</span><span class="o">></span>
- <span class="o"><</span><span class="nx">head</span><span class="o">></span>
- <span class="o"><</span><span class="nx">title</span><span class="o">></span><span class="nx">Upload</span> <span class="nx">Form</span><span class="o"></</span><span class="nx">title</span><span class="o">></span>
- <span class="o"></</span><span class="nx">head</span><span class="o">></span>
- <span class="o"><</span><span class="nx">body</span><span class="o">></span>
- <span class="o"><</span><span class="nx">h3</span><span class="o">></span><span class="nx">Your</span> <span class="nb">file</span> <span class="nx">was</span> <span class="nx">successfully</span> <span class="nx">uploaded</span><span class="o">!</</span><span class="nx">h3</span><span class="o">></span>
- <span class="o"><</span><span class="nx">ul</span><span class="o">></span>
- <span class="o"><?</span><span class="nx">php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$upload_data</span> <span class="k">as</span> <span class="nv">$item</span> <span class="o">=></span> <span class="nv">$value</span><span class="p">)</span><span class="o">:</span><span class="cp">?></span>
- <span class="p"><</span><span class="nt">li</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$item</span><span class="p">;</span><span class="cp">?></span>: <span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$value</span><span class="p">;</span><span class="cp">?></span><span class="p"></</span><span class="nt">li</span><span class="p">></span>
- <span class="cp"><?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?></span>
- <span class="p"></</span><span class="nt">ul</span><span class="p">></span>
- <span class="p"><</span><span class="nt">p</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">anchor</span><span class="p">(</span><span class="s1">'upload'</span><span class="p">,</span> <span class="s1">'Upload Another File!'</span><span class="p">);</span> <span class="cp">?></span><span class="p"></</span><span class="nt">p</span><span class="p">></span>
- <span class="p"></</span><span class="nt">body</span><span class="p">></span>
- <span class="p"></</span><span class="nt">html</span><span class="p">></span>
- </pre></div>
- </div>
- </div>
- <div class="section" id="the-controller">
- <h3><a class="toc-backref" href="#id4">The Controller</a><a class="headerlink" href="#the-controller" title="Permalink to this headline">¶</a></h3>
- <p>Using a text editor, create a controller called Upload.php. In it, place
- this code and save it to your <strong>application/controllers/</strong> directory:</p>
- <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
- <span class="k">class</span> <span class="nc">Upload</span> <span class="k">extends</span> <span class="nx">CI_Controller</span> <span class="p">{</span>
- <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span>
- <span class="p">{</span>
- <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span>
- <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'form'</span><span class="p">,</span> <span class="s1">'url'</span><span class="p">));</span>
- <span class="p">}</span>
- <span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span>
- <span class="p">{</span>
- <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'upload_form'</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'error'</span> <span class="o">=></span> <span class="s1">' '</span> <span class="p">));</span>
- <span class="p">}</span>
- <span class="k">public</span> <span class="k">function</span> <span class="nf">do_upload</span><span class="p">()</span>
- <span class="p">{</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'upload_path'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'./uploads/'</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'allowed_types'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'gif|jpg|png'</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'max_size'</span><span class="p">]</span> <span class="o">=</span> <span class="mi">100</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'max_width'</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1024</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'max_height'</span><span class="p">]</span> <span class="o">=</span> <span class="mi">768</span><span class="p">;</span>
- <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'upload'</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span>
- <span class="k">if</span> <span class="p">(</span> <span class="o">!</span> <span class="nv">$this</span><span class="o">-></span><span class="na">upload</span><span class="o">-></span><span class="na">do_upload</span><span class="p">(</span><span class="s1">'userfile'</span><span class="p">))</span>
- <span class="p">{</span>
- <span class="nv">$error</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'error'</span> <span class="o">=></span> <span class="nv">$this</span><span class="o">-></span><span class="na">upload</span><span class="o">-></span><span class="na">display_errors</span><span class="p">());</span>
- <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'upload_form'</span><span class="p">,</span> <span class="nv">$error</span><span class="p">);</span>
- <span class="p">}</span>
- <span class="k">else</span>
- <span class="p">{</span>
- <span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'upload_data'</span> <span class="o">=></span> <span class="nv">$this</span><span class="o">-></span><span class="na">upload</span><span class="o">-></span><span class="na">data</span><span class="p">());</span>
- <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'upload_success'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
- <span class="p">}</span>
- <span class="p">}</span>
- <span class="p">}</span>
- <span class="cp">?></span>
- </pre></div>
- </div>
- </div>
- <div class="section" id="the-upload-directory">
- <h3><a class="toc-backref" href="#id5">The Upload Directory</a><a class="headerlink" href="#the-upload-directory" title="Permalink to this headline">¶</a></h3>
- <p>You’ll need a destination directory for your uploaded images. Create a
- directory at the root of your CodeIgniter installation called uploads
- and set its file permissions to 777.</p>
- </div>
- <div class="section" id="try-it">
- <h3><a class="toc-backref" href="#id6">Try it!</a><a class="headerlink" href="#try-it" title="Permalink to this headline">¶</a></h3>
- <p>To try your form, visit your site using a URL similar to this one:</p>
- <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">example</span><span class="o">.</span><span class="nx">com</span><span class="o">/</span><span class="nx">index</span><span class="o">.</span><span class="nx">php</span><span class="o">/</span><span class="nx">upload</span><span class="o">/</span>
- </pre></div>
- </div>
- <p>You should see an upload form. Try uploading an image file (either a
- jpg, gif, or png). If the path in your controller is correct it should
- work.</p>
- </div>
- </div>
- <div class="section" id="reference-guide">
- <h2><a class="toc-backref" href="#id7">Reference Guide</a><a class="headerlink" href="#reference-guide" title="Permalink to this headline">¶</a></h2>
- <div class="section" id="initializing-the-upload-class">
- <h3><a class="toc-backref" href="#id8">Initializing the Upload Class</a><a class="headerlink" href="#initializing-the-upload-class" title="Permalink to this headline">¶</a></h3>
- <p>Like most other classes in CodeIgniter, the Upload class is initialized
- in your controller using the <code class="docutils literal"><span class="pre">$this->load->library()</span></code> method:</p>
- <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'upload'</span><span class="p">);</span>
- </pre></div>
- </div>
- <p>Once the Upload class is loaded, the object will be available using:
- $this->upload</p>
- </div>
- <div class="section" id="setting-preferences">
- <h3><a class="toc-backref" href="#id9">Setting Preferences</a><a class="headerlink" href="#setting-preferences" title="Permalink to this headline">¶</a></h3>
- <p>Similar to other libraries, you’ll control what is allowed to be upload
- based on your preferences. In the controller you built above you set the
- following preferences:</p>
- <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">'upload_path'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'./uploads/'</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'allowed_types'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'gif|jpg|png'</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'max_size'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'100'</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'max_width'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'1024'</span><span class="p">;</span>
- <span class="nv">$config</span><span class="p">[</span><span class="s1">'max_height'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'768'</span><span class="p">;</span>
- <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class=…