I'm using the Multiple Select Dropdown Lists with Ajax, with the code from this page:
columns-description-msl-ajax-t168.htm
and I tried to get description in a nice html table but I am not getting anywhere - I tried everywhere to insert between line 68/70 but it does not give me a nice table.
frozzie.com/scu/multiple/test.php
This is the code in select_lists.php
Code: Select all
<?php
// Multiple select lists - https://coursesweb.net/ajax/
// Here add your own data for connecting to MySQL database
$server = 'localhost';
$user = 'testing';
$pass = '1234';
$dbase = 'frozzie_orientation';
// Here add the name of the table and columns that will be used for select lists, in their order
// Add null for 'links' if you don`t want to display their data too
$table = 'orientation_schedule';
$ar_cols = array('campus', 'course', 'category', 'title');
//Here you can add extra columns with data for description
//Let it empty ( array(() ) if you not use additional column for description
$extra_desc = array('descr', 'start date', 'end date', 'start time', 'end time', 'location');
if(!isset($_SESSION)) session_start();
header('Content-type: text/html; charset=utf-8');
$preid = 'slo_'; // a prefix used for element's ID, in which Ajax will add <select>
$col = $ar_cols[0]; // the variable used for the column that wil be selected
$nrc = count($extra_desc);
$re_html = ''; // will store the returned html code
// if there is data sent via POST, with index 'col' and 'wval'
if(isset($_POST['col']) && isset($_POST['wval'])) {
// set the $col that will be selected and the value for WHERE (delete tags and external spaces in $_POST)
$col = trim(strip_tags($_POST['col']));
$wval = trim(strip_tags($_POST['wval']));
}
$key = array_search($col, $ar_cols); // get the key associated with the value of $col in $ar_cols
$wcol = $key===0 ? $col : $ar_cols[$key-1]; // gets the column for the WHERE clause
// gets the next element in $ar_cols (needed in the onchange() function in <select> tag)
$last_key = count($ar_cols)-1;
$next_col = $key<$last_key ? $ar_cols[$key+1] : '';
$conn = new mysqli($server, $user, $pass, $dbase); // connect to the MySQL database
if (mysqli_connect_errno()) { exit('Connect failed: '. mysqli_connect_error()); } // check connection
$_SESSION['ar_cols'][$wcol] = isset($wval) ? $conn->real_escape_string($wval) : $wcol; // store in SESSION the column and its value for WHERE
// sets an array with data of the WHERE condition (column=value) for SELECT query
for($i=1; $i<=$key; $i++) {
$ar_where[] = '`'. $ar_cols[$i-1]. "`='". $_SESSION['ar_cols'][$ar_cols[$i-1]] ."'";
}
// define a string with the WHERE condition, and then the SELECT query
$where = isset($ar_where) ? ' WHERE '. implode($ar_where, ' AND ') : '';
$get_cols = $key<$last_key ? $col : $col .($nrc >0 ?','. implode(',', $extra_desc) :'');
$get_cols = '`'. str_replace(array('`', ','), array('', '`,`'), $get_cols) .'`'; //add the column names between `..`
$sql = "SELECT DISTINCT $get_cols FROM `$table`".$where;
$result = $conn->query($sql); // perform the query and store the result
// if the $result contains at least one row
if ($result->num_rows > 0) {
// sets the "onchange" event, which is added in <select> tag
$onchg = $next_col!==null ? " onchange=\"ajaxReq('$next_col', this.value);\"" : '';
// sets the select tag list (and the first <option>), if it's not the last column
if($col!=$ar_cols[$last_key]) $re_html = $col. ': <select name="'. $col. '"'. $onchg. '><option>- - -</option>';
while($row = $result->fetch_assoc()) {
// if its the last column, set a tablle with description, else, adds data in OPTION tags
if($col==$ar_cols[$last_key]){
$re_html .= '<table width="200" border="1">
<tr>
<td>Title</td>
<td>Description</td>
<td>Start Date</td>
<td>End Date</td>
<td>Start Time</td>
<td>End Time</td>
<td>Location</td>
</tr>
</table>'. $row[$col] .'</td></tr>'; //start table with data from first column for description
for($i=0; $i<$nrc; $i++) $re_html .='<tr><td>'. $row[str_replace('`', '', $extra_desc[$i])] .'</td></tr>'; //add data from $extra_desc columns
$re_html .='</table>'; //end table
}
else $re_html .= '<option value="'. $row[$col]. '">'. $row[$col]. '</option>';
}
if($col!=$ar_cols[$last_key]) $re_html .= '</select> '; // ends the Select list
}
else { $re_html = '0 results'; }
$conn->close();
// if the selected column, $col, is the first column in $ar_cols
if($col==$ar_cols[0]) {
// adds html code with SPAN (or DIV for last item) where Ajax will add the select dropdown lists
// with ID in each SPAN, according to the columns added in $ar_cols
for($i=1; $i<count($ar_cols); $i++) {
if($ar_cols[$i]===null) continue;
if($i==$last_key) $re_html .= '<div id="'. $preid.$ar_cols[$i]. '"> </div>';
else $re_html .= '<span id="'. $preid.$ar_cols[$i]. '"> </span>';
}
// adds the columns in JS (used in removeLists() to remove the next displayed lists when makes other selects)
$re_html .= '<script>var ar_cols = '.json_encode($ar_cols).'; var preid = "'. $preid. '";</script>';
}
else echo $re_html; 