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POAjax updating database after submit
 

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    <p>I modified the code here (http://www.w3schools.com/PHP/php_ajax_database.asp) to update and display my database after an input box is typed and a button is clicked to submit. I have </p> <pre><code>&lt;form method="post" action="process.php" id="processer" onsubmit="showUser('me');"&gt; &lt;label for="Process"&gt;Process&lt;/label&gt;&lt;input type="text" name="process" id="process"&gt; &lt;input type="submit" value="Process"&gt; &lt;/form&gt; </code></pre> <p>My Ajax code sends a:</p> <pre><code>xmlhttp.open("GET","getuser.php?q="+str+"&amp;t=" + Math.random(),true); xmlhttp.send(); </code></pre> <p>and finally my getuser.php is</p> <pre><code>&lt;?php $q=$_GET["q"]; $con = mysql_connect('localhost', 'root', ''); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("short", $con); $sql="SELECT * FROM table WHERE creator = '$q'"; $result = mysql_query($sql); echo "&lt;table border='1'&gt; &lt;tr&gt; &lt;th&gt;id&lt;/th&gt; &lt;th&gt;data&lt;/th&gt; &lt;/tr&gt;"; while($row = mysql_fetch_array($result)) { echo "&lt;tr&gt; &lt;td&gt;" . $row['id'] . "&lt;/td&gt; &lt;td&gt;" . $row['data'] . "&lt;/td&gt; &lt;/tr&gt;"; } echo "&lt;/table&gt;"; mysql_close($con); ?&gt; </code></pre> <p>The problem is that when I click submit, sometimes 1 refreshes, sometimes 2 refresh, and others none at all. Like let's say i'm submitting the numbers 1 through 10, first time through I see 1, 2, then after inputting 3, i dont see anything, then suddenly 3, 4, and then nothing then 5 (while I just inputted 6), then 6, then 7, 8. </p> <p>Is my php display data getting cached? or how can i make the refreshing smooth and consistent?</p> <p>Thanks in advance.</p>
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    1. COYour example code is susceptible to SQL exploits. (Like pretty much all examples on w3schools. And you would find a better AJAX introduction anywhere else). -- I have no idea what you mean with 1,2,3,4,.. But instead of tedious manual xmlhttprequest setups, use jQuery which handles potential caching issues more reliably.
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    2. COThank you very much, turns out I was calling the data too quickly before it was stored into the database
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