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POHow to get the age from a birthdate using PHP & MySQL?
 

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  1. POHow to get the age from a birthdate using PHP & MySQL?
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    <p>I ask my users for their birthdate and store it in my database in the following way <code>$month</code> <code>$day</code> <code>$year</code> output <code>May 6 1901</code> but I was wondering how can I get the age from the stored birthdate using PHP &amp; MySQL?</p> <p>Here is the PHP code.</p> <pre><code>if (isset($_POST['submitted'])) { $mysqli = mysqli_connect("localhost", "root", "", "sitename"); $dbc = mysqli_query($mysqli,"SELECT users.* FROM users WHERE user_id=3"); $month_options = array("Month", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"); $day_options = array("Day", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31"); $month = mysqli_real_escape_string($mysqli, htmlentities(strip_tags($_POST['month']))); $day = mysqli_real_escape_string($mysqli, htmlentities(strip_tags($_POST['day']))); $year = mysqli_real_escape_string($mysqli, htmlentities(strip_tags($_POST['year']))); if (mysqli_num_rows($dbc) == 0) { $mysqli = mysqli_connect("localhost", "root", "", "sitename"); $dbc = mysqli_query($mysqli,"INSERT INTO users (user_id, month, day, year) VALUES ('$user_id', '$month', '$day', '$year')"); } if ($dbc == TRUE) { $dbc = mysqli_query($mysqli,"UPDATE users SET month = '$month', day = '$day', year = '$year' WHERE user_id = '$user_id'"); echo '&lt;p class="changes-saved"&gt;Your changes have been saved!&lt;/p&gt;'; } if (!$dbc) { print mysqli_error($mysqli); return; } } </code></pre> <p>Here is the html.</p> <pre><code>&lt;form method="post" action="index.php"&gt; &lt;fieldset&gt; &lt;ul&gt; &lt;li&gt;&lt;label&gt;Date of Birth: &lt;/label&gt; &lt;label for="month" class="hide"&gt;Month: &lt;/label&gt; &lt;?php // month options echo '&lt;select name="month" id="month"&gt;' . "\n"; foreach($month_options as $option) { if ($option == $month) { echo '&lt;option value="' . stripslashes(htmlentities(strip_tags($option))) . '" selected="selected"&gt;' . stripslashes(htmlentities(strip_tags($option))) . '&lt;/option&gt;' . "\n"; } else { echo '&lt;option value="'. stripslashes(htmlentities(strip_tags($option))) . '"&gt;' . stripslashes(htmlentities(strip_tags($option))) . '&lt;/option&gt;'."\n"; } } echo '&lt;/select&gt;'; ?&gt; &lt;label for="day" class="hide"&gt;Day: &lt;/label&gt; &lt;?php // day options echo '&lt;select id="day" name="day"&gt;' . "\n"; foreach($day_options as $option) { if ($option == $day) { echo '&lt;option value="' . stripslashes(htmlentities(strip_tags($option))) . '" selected="selected"&gt;' . stripslashes(htmlentities(strip_tags($option))) . '&lt;/option&gt;' . "\n"; } else { echo '&lt;option value="'. stripslashes(htmlentities(strip_tags($option))) . '"&gt;' . stripslashes(htmlentities(strip_tags($option))) . '&lt;/option&gt;'."\n"; } } echo '&lt;/select&gt;'; ?&gt; &lt;label for="year" class="hide"&gt;Year: &lt;/label&gt;&lt;input type="text" name="year" id="year" size="4" maxlength="4" value="&lt;?php if (isset($_POST['year'])) { echo stripslashes(htmlentities(strip_tags($_POST['year']))); } else if(!empty($year)) { echo stripslashes(htmlentities(strip_tags($year))); } ?&gt;" /&gt;&lt;/li&gt; &lt;li&gt;&lt;input type="submit" name="submit" value="Save Changes" class="save-button" /&gt; &lt;input type="hidden" name="submitted" value="true" /&gt; &lt;input type="submit" name="submit" value="Preview Changes" class="preview-changes-button" /&gt;&lt;/li&gt; &lt;/ul&gt; &lt;/fieldset&gt; &lt;/form&gt; </code></pre>
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