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<li class="toctree-l1"><a class="reference internal" href="choropleth.html">Leaflet Choropleth App</a></li>
<li class="toctree-l1"><a class="reference internal" href="geojson.html">Leaflet GeoJson</a></li>
<li class="toctree-l1 current"><a class="current reference internal" href="#">Leaflet and PHP</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#access">Access</a></li>
<li class="toctree-l2"><a class="reference internal" href="#initialize">Initialize</a></li>
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<div class="section" id="leaflet-and-php">
<h1><a class="toc-backref" href="#id1">Leaflet and PHP</a><a class="headerlink" href="#leaflet-and-php" title="Permalink to this headline"></a></h1>
<div class="contents topic" id="table-of-contents">
<p class="topic-title">Table of Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#leaflet-and-php" id="id1">Leaflet and PHP</a><ul>
<li><a class="reference internal" href="#access" id="id2">Access</a></li>
<li><a class="reference internal" href="#initialize" id="id3">Initialize</a></li>
<li><a class="reference internal" href="#security" id="id4">Security</a></li>
<li><a class="reference internal" href="#structure" id="id5">Structure</a></li>
<li><a class="reference internal" href="#content" id="id6">Content</a></li>
<li><a class="reference internal" href="#documentation" id="id7">Documentation</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="access">
<h2><a class="toc-backref" href="#id2">Access</a><a class="headerlink" href="#access" title="Permalink to this headline"></a></h2>
<p>A web application employing PostGIS, PHP, and LeafletJS.</p>
<p>This application uses the PHP-Database-GeoJSON file from <a class="reference external" href="https://github.com/bmcbride/PHP-Database-GeoJSON">https://github.com/bmcbride/PHP-Database-GeoJSON</a></p>
<p>It can be access via <a class="reference external" href="http://domain.com/LeafletPHPDemo.html">http://domain.com/LeafletPHPDemo.html</a></p>
<img alt="../_images/leaflet-geojson-europe.png" src="../_images/leaflet-geojson-europe.png" />
</div>
<div class="section" id="initialize">
<h2><a class="toc-backref" href="#id3">Initialize</a><a class="headerlink" href="#initialize" title="Permalink to this headline"></a></h2>
<p>If you any issues connecting to PostGIS, check line 12 of get-json.phpbelow:</p>
<blockquote>
<div>$conn = new PDO(‘pgsql:host=localhost;dbname=postgisftw’,’pgis’,’&lt;YourPgisPassword&gt;’);</div></blockquote>
<p>Replace &lt;YourPgisPassword&gt; with the password for user pgis.</p>
<p>The password for user pgis is auto-generated and can be found at /home/pgis/.pgpass</p>
</div>
<div class="section" id="security">
<h2><a class="toc-backref" href="#id4">Security</a><a class="headerlink" href="#security" title="Permalink to this headline"></a></h2>
<p>This map loads GeoJson generated from PostGIS directly and does not employ the pg_featurserv or GeoServer urls.</p>
<p>As you may have noticed, it is identical to our LeafletGeoJson.html map except for the GeoJson source url.</p>
<p>While urls for pg_featurserv and GeoServer can be secured, the url will always be exposed to your users as it is required for map rendering.</p>
<p>Conversely, the PostGIS PHP application uses the get-json.php file to establish a connection to PostGIS in the background.</p>
<p>You can employ the same method for loading GeoJson from pg_featurserv, GeoServer, or any other json url.</p>
<p>There is performance penalty, however, as the GeoJson is loaded into the end users browser and for large data sets, this can become extremely slow.</p>
</div>
<div class="section" id="structure">
<h2><a class="toc-backref" href="#id5">Structure</a><a class="headerlink" href="#structure" title="Permalink to this headline"></a></h2>
<p>The app is located at:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">/</span><span class="n">vaw</span><span class="o">/</span><span class="n">www</span><span class="o">/</span><span class="n">html</span><span class="o">/</span><span class="n">LeafletPHPDemo</span><span class="o">.</span><span class="n">html</span>
</pre></div>
</div>
<p>This is just a basic Leafletjs map in which we are pulling in geojson from get-json.php:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$.getJSON(&quot;get-json.php&quot;, function(data) {
</pre></div>
</div>
</div>
<div class="section" id="content">
<h2><a class="toc-backref" href="#id6">Content</a><a class="headerlink" href="#content" title="Permalink to this headline"></a></h2>
<p>The content of the html page is displayed below.</p>
<div class="highlight-console notranslate"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="normal">54</span></pre></div></td><td class="code"><div><pre><span></span><span class="go"> &lt;!doctype html&gt;</span>
<span class="go"> &lt;html&gt;</span>
<span class="go"> &lt;head&gt;</span>
<span class="go"> &lt;style type=&quot;text/css&quot;&gt;</span>
<span class="go"> body {</span>
<span class="go"> padding: 0;</span>
<span class="go"> margin: 0;</span>
<span class="go"> }</span>
<span class="go"> html, body, #map {</span>
<span class="go"> height: 100%;</span>
<span class="go"> }</span>
<span class="go"> &lt;/style&gt;</span>
<span class="go"> &lt;link rel=&quot;stylesheet&quot; href=&quot;https://unpkg.com/leaflet@1.1.0/dist/leaflet.css&quot;</span>
<span class="go"> integrity=&quot;sha512-wcw6ts8Anuw10Mzh9Ytw4pylW8+NAD4ch3lqm9lzAsTxg0GFeJgoAtxuCLREZSC5lUXdVyo/7yfsqFjQ4S+aKw==&quot;</span>
<span class="go"> crossorigin=&quot;&quot;/&gt;</span>
<span class="go"> &lt;script src=&quot;https://unpkg.com/leaflet@1.1.0/dist/leaflet.js&quot;</span>
<span class="go"> integrity=&quot;sha512-mNqn2Wg7tSToJhvHcqfzLMU6J4mkOImSPTxVZAdo+lcPlk+GhZmYgACEe0x35K7YzW1zJ7XyJV/TT1MrdXvMcA==&quot;</span>
<span class="go"> crossorigin=&quot;&quot;&gt;&lt;/script&gt;</span>
<span class="go"> &lt;/head&gt;</span>
<span class="go"> &lt;script src=&quot;http://code.jquery.com/jquery-2.1.0.min.js&quot;&gt;&lt;/script&gt;</span>
<span class="go"> &lt;/head&gt;</span>
<span class="go"> &lt;body&gt;</span>
<span class="go"> &lt;div id=&quot;map&quot;&gt;&lt;/div&gt;</span>
<span class="go"> &lt;script&gt;</span>
<span class="go"> var osmUrl=&#39;http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png&#39;;</span>
<span class="go"> var osmAttrib=&#39;Data &amp;copy &lt;a href=&quot;http://openstreetmap.org&quot;&gt;OpenStreetMap&lt;/a&gt; contributors&#39;;</span>
<span class="go"> var osm = new L.TileLayer(osmUrl, {minZoom: 2, maxZoom: 8, attribution: osmAttrib});</span>
<span class="gp"> $</span>.getJSON<span class="o">(</span><span class="s2">&quot;get-json.php&quot;</span>,<span class="w"> </span><span class="k">function</span><span class="o">(</span>data<span class="o">)</span><span class="w"> </span><span class="o">{</span>
<span class="go"> function onEachFeature(feature, layer) {</span>
<span class="go"> layer.bindPopup(&quot;Name: &quot; + feature.properties.name + &quot;&lt;br&gt;&quot; + &quot;Abbreviation: &quot; + feature.properties.abbrev);</span>
<span class="go"> }</span>
<span class="go"> var geojson = L.geoJson(data, {</span>
<span class="go"> onEachFeature: onEachFeature</span>
<span class="go"> });</span>
<span class="go"> var map = L.map(&#39;map&#39;).fitBounds(geojson.getBounds());</span>
<span class="go"> osm.addTo(map);</span>
<span class="go"> geojson.addTo(map);</span>
<span class="go"> });</span>
<span class="go"> &lt;/script&gt;</span>
<span class="go"> &lt;/body&gt;</span>
<span class="go"> &lt;/html&gt;</span>
</pre></div></td></tr></table></div>
</div>
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<h2><a class="toc-backref" href="#id7">Documentation</a><a class="headerlink" href="#documentation" title="Permalink to this headline"></a></h2>
<p><a class="reference external" href="https://leafletjs.com/">https://leafletjs.com/</a></p>
<p><a class="reference external" href="https://leafletjs.com/examples/geojson/">https://leafletjs.com/examples/geojson/</a></p>
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