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POWhy is isset($_POST['submit1']) equal to FALSE?
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  1. POWhy is isset($_POST['submit1']) equal to FALSE?
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    copied!<p>This is a follow-up of another question that I posted a few hours ago (<a href="https://stackoverflow.com/questions/18325764/php-post-method-apparently-not-working">PHP post method apparently not working</a>). The code still does not do what it should, but the code and also the question itself have changed so much that I prefer to post a new question (also considering that questions seem to be read mainly immediately after they have been posted). I’ll try to close the earlier question (still somewhat new here).</p> <p>On to the question then: why is, in the code given below, isset($_POST['submit1']) equal to FALSE when tested? In other words, why is $_POST['submit1'] equal to NULL? I believe that’s all I need to know.</p> <p>Here is the code, which consists of two files. The file ‘form.php’ (copied almost literally from the jQuery-site: <a href="http://www.visualjquery.net/category/Ajax/jQuery.post" rel="nofollow noreferrer">http://www.visualjquery.net/category/Ajax/jQuery.post</a> , see last example) contains the following code:</p> <pre><code>&lt;!doctype html&gt; &lt;html lang="en"&gt; &lt;head&gt; &lt;meta charset="utf-8"&gt; &lt;title&gt;jQuery.post demo&lt;/title&gt; &lt;script src="http://code.jquery.com/jquery-1.9.1.js"&gt;&lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;form action="formprocessing.php" name="formpje" id="searchForm"&gt; &lt;input type="text" name="s" placeholder="Search..." /&gt; &lt;input type="submit" value="Search" name="submit1" /&gt; &lt;/form&gt; &lt;!-- the result of the search will be rendered inside this div --&gt; &lt;div id="result"&gt;&lt;/div&gt; &lt;script&gt; /* attach a submit handler to the form */ $("#searchForm").submit(function(event) { /* stop form from submitting normally */ event.preventDefault(); /* get some values from elements on the page: */ var $form = $( this ), term = $form.find( 'input[name="s"]' ).val(), url = $form.attr( 'action' ); /* Send the data using post */ var posting = $.post(url,{s: term},'json'); /* Put the results in a div */ posting.done(function( data ) { var content1 = $( data ).find( '#content' ); contentstring = JSON.stringify(content1); $( "#result" ).empty().append( contentstring ); }); }); &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>And the file ‘formprocessing.php’ contains the following (this includes the isset-test):</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;?php if(isset($_POST['submit1'])) { echo ( json_encode(array("content" =&gt; $invoer)) ); } ?&gt; </code></pre> <p>Thanks!</p>
 

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