I have a dropdown menu populated from a table in a MySQL database. It functions, but I would like to add an if/else statement to the code to change the default value of the dropdown according to the conditions.
Here is the code for the dropdown (much thanks to AlienWebguy for his assistance in getting this far):
<?php
$sql="SELECT techID, tech_userlogin FROM technicians";
$result=mysql_query($sql);
while ($row=mysql_fetch_array($result))
{
$techID = $row['techID'];
$tech_userlogin=$row['tech_userlogin'];
// Here - check if the $_GET value in the query matches the tech_userlogin
($selected = ($tech_userlogin == $_GET['wtech_userlogin']) ? 'selected="selected"' : '');
echo '<option value="' . $tech_userlogin . '" ' . $selected . '>' . $tech_userlogin . '</option>' . "\n";
}
?>
I've tried a couple of things to accomplish what I'm after, but I'm severely hampered by my lack of experience and/or expertise in PHP/MySQL.
This is the first time I've tried these things and it has been hit and miss so far. I've recieved help here at Stack Overflow and I'm grateful such a resource exists.
This is my latest effort and it fails to achieve what I'm after. I want the default value of the dropdown to be "--Select Technician--" if the condition is not met in the if statement.
<?php
$sql="SELECT techID, tech_userlogin FROM technicians";
$result=mysql_query($sql);
$options="";
while ($row=mysql_fetch_array($result))
{
$techID = $row['techID'];
$tech=$row['tech_userlogin'];
$options.="<option value=\"$tech\">$tech</option>";
// Here - check if the $_GET value in the query matches the tech_userlogin
if
($selected = ($tech == $_GET['wtech_userlogin']) ? 'selected="selected"' : '')
{echo '<option value="' . $tech . '" ' . $selected . '>' . $tech . '</option>' . "\n";}
else
{echo '<option value="' . $options . '" . 'selected="selected"'>'--Select Tech--'<. $options .>' . "\n";}
}
?>
Can someone please help me or point me in the right direction? Many thanks.
Cheers
Try this
<select name="whatever">
<option value="">-- Select Technician --</option>
<?php while ($row = mysql_fetch_array($result)) :
$techId = $row['techID']; // why isn't this used?
$tech = htmlspecialchars($row['tech_userlogin']);
$selected = $row['tech_userlogin'] == $_GET['wtech_userlogin'] ? '" selected="selected' : '';
?>
<option value="<?php echo $tech, $selected ?>"><?php echo $tech ?></option>
<?php endwhile ?>
</select>
If the whole if/then is just there to create a default, you're making it way too complicated.
$options = '<option value="">--Select Tech--</option>';
while ($row=mysql_fetch_array($result))
{
$techID = $row['techID'];
$tech = $row['tech_userlogin'];
$selected = ($tech == $_GET['wtech_userlogin']) ? 'selected="selected"' : '';
$options .= '<option value="' . $techID . '" ' . $selected . '>' . $tech . '</option>' . "\n";
}
Now $options has all of your options in it, including a default option (--Select Tech--, with empty value) that shows up first, and will therefore start out selected if nothing else has the selected attribute.
Note that you also had $tech in the value of your option, but I assumed you meant to say $techID.
You wrote this, which isn't doing what you want:
($selected = ($tech == $_GET['wtech_userlogin']) ? 'selected="selected"' : '')
Change to this:
($selected = ($tech == $_GET['wtech_userlogin']) ? 'selected="selected"' : false)
Notice the 'false'. You need that because empty quotes is not false, it is considered 'true' by PHP.
I could be wrong, but I believe the problem is with your if statement. You have:
($selected = ($tech == $_GET['wtech_userlogin']) ? 'selected="selected"' : '')
The problem is that you are assigning the result of the ternary statement to the variable $selected, which will always return a true for a successful assignment.
Related
I have a select (dropdown) box. On each button click, I'd like it to load previously saved position. My code is:
<select name="myVariables" style="width:150px">
<?php
foreach ( $variables as $var ) {
echo "<option value=\"" . $var . "\"". $var . " </option>";}
?>
</select>
I have a variable $previouslySelected, and every time the button is clicked, this variable can change. I'd like to also change the currently selected option in the select box to the same value. I've tried with:
echo "<option value=\"" . $var . "\" <?=$previouslySelected==$var ? ' selected=\"selected\"' : '';?\>>". $var . " </option>";}
but this doesn't seem to work.
Also, I've tried this but it only works the first time.
How do you submit the form. With GET or POST?
With GET, than you must take the submitted value in this way:
$previouslySelected = isset($_GET['myVariables']) ? $_GET['myVariables'] : '';
Otherwise with POST:
$previouslySelected = isset($_POST['myVariables']) ? $_POST['myVariables'] : '';
In PHP 7 you can also do:
$previouslySelected = $_POST['myVariables'] ?? '';
EDIT: Write your echo more readable.
$selected = ($previouslySelected === $var) ? ' selected="selected"' : '';
echo '<option value="' . $var . '" ' . $selected . '>' . $var . '</option>';
I have a database field country which I want to query and select that country option from a select element. Is there any way to do this without adding:
if (query->country == "<some country>"){echo "selected"}
in every single option tag? As there are hundreds of country options. Here is a little example of the code. Thank you.
$query = $query->fetch_object();
// which ever country is held in the variable `$query->country` should be selected
echo"<select>
<option>Afghanistan</option>
......
......
<option>Zimbabwe</option>
</select>";
Don't you have a list of all countries on your server?
$countries = ["Afghanistan", ... , "Zimbabwe"];
You could do something like this:
$selection = "Some country";
echo "<select>";
foreach($countries as $country)
{
if($country == $selection)
echo "<option selected>" . $country . "</option>";
else
echo "<option>" . $country . "</option>";
}
echo "</select>";
The IF still needs to be "placed" on every <option> but as a programmer you should do something like this:
$options = array( 'Afghanistan', '...', 'Zimbabwe' );
foreach( $options as $option )
{
$selected = ( $query->country == $option )? ' selected': '';
echo '<option' . $selected . '>' . $option . '</option>';
}
and if you're unfamiliar with ternary operator, the $selected = ... part above can be written like this:
if ( $query->country == $option )
{
$selected = ' selected';
}
else
{
$selected = '';
}
I have a country list of every country in a form to get a parcel quote.
When a user presses the "Get Quote" button, all the text forms retain the information previously entered using PHP.
How can I do this with the country list box? As I can't have PHP on every option checking if that is the country selected and adding "Selected" to the html.
Is there a better way other than generating the country list from a file in a loop?
EDIT:
Going for the method of looping through a file, and checking..
This is what I have so far:
$countries = fopen("includes/countries.txt", "r");
$countries = explode(";", $countries);
Then in the HTML:
<select id="countries" name="countries">
<?php
foreach ($countries as $country){
echo("<option value=\"" . $country . "\">" . $country . "</option>");
}
?>
</select>
Not yet finished.
I assume you have an array with your countries stored. You could try something like this:
$countries = array('Albania', 'Egypt');
$selected_country_id = $_GET['c_id']; // You may need to change this to match with your code
$country_selected = array();
foreach($countries as $country) {
if($country['id'] == $selected_country_id) {
$country_selected[ $country['id'] ] = ' selected ';
} else {
$country_selected[ $country['id'] ] = '';
}
}
Then, assuming that you dynamically add your Select-Options, do this:
// In your each-fn
echo '<option value="' . $country['id'] . '" ' . $country_selected[ $country['id'] ] . '>' . $country['name'] . '</option>';
Something like this would be better
foreach ($countries as $country) {
?>
<option value="<?php echo $country" <?php echo ($country == $_POST['country'] ? 'selected' : ''; ?>><?php echo $country; ?></option>
<?php
}
<select id="countries" name="countries">
<?php
foreach ($countries as $country){
if(isset($_POST["country"]) && $_POST["country"] == $country){
$sel = "selected";
}else { $sel= ""; }
echo("<option value=\"" . $country . "\"" .$sel.">" . $country . "</option>");
}
?>
</select>
Get All Country-State-City Selectbox ....!!!
See Link : GitHub
Firstly apologies for asking this as it is quite basic but
I just can't seem to get it right. Have searched on here and
elsewhere for an answer (and tried various) but there is always
an error. Spent too long on this little bit and should really know
the answer but here goes:
Ok I have a main php file using an include statement to bring in a drop down menu
with the options being populated from a MySQL database. In the file being included I have this while loop which creates the
options and works fine:
while ($db_field = mysql_fetch_assoc($result)) {
$ManList2 = $db_field['categoryName'];
echo '<option value="' . $ManList2 . '">' . $ManList2 . '</option>';
}
What I want to add is something like the following in the option tag:
if($search == '$ManList2') { echo 'selected'; }
I just can't seem to get it right in the echo statement.
Any help greatly appreciated.
echo '<option value="'.$ManList2.'" '.($search == $ManList2 ? 'selected' : '').'>'.$ManList2.'</option>';
How about something like this:
while ($db_field = mysql_fetch_assoc($result)) {
$ManList2 = $db_field['categoryName'];
echo '<option value="' . $ManList2 . '"';
if($search == '$ManList2') {
echo ' selected';
}
echo '>' . $ManList2 . '</option>';
}
echo "<option value='".$ManList2; if($search == '$ManList2'){ echo 'selected'; } echo "'>".$ManList2."</option>";
You may try something like this (Assumed your select's name is search)
$search = isset($_POST['search']) ? $_POST['search'] : ''; // or $_GET maybe
$selected = '';
while ( $db_field = mysql_fetch_assoc($result) ) {
$ManList2 = $db_field['categoryName'];
$selected = $search == $ManList2 ? 'selected' : '';
echo '<option '.$selected.' value="'.$ManList2.'">'.$ManList2.'</option>';
}
You could use variables to put into your PHP, like:
while($db_field = mysql_fetch_assoc($result)) {
$ManList2 = $db_field['categoryName'];
$selected = $search === $ManList2 ? "selected='selected'" : '';
echo "<option value='$ManList2'$selected>$ManList2</option>";
}
I don't see what $search does, so this approach may not work. I would use my PHPglue Library. It handles this sort of thing for you.
I'm having problem with capturing the value from drop down list. This is my code for drop down list which is product id.
<select name="id" id="id" ONCHANGE="location =this.options[this.selectedIndex].value;" >
<option value="---">---</option>
<?php
foreach( $products as $ID => $info ){
echo '<option value="new_purchase.php?id=' . $ID . '"';
echo isset( $id ) && $id == $ID ? ' selected="selected"' : '';
echo '>' . $info['id'] . '</option>'; }
?>
</select>
And this is my code for capture the value.
$id = $mysqli->real_escape_string ($_POST['$("#id:selected").val()'] );
The query run but it stores 0 as product id value no matter what I chose.
Any helps would be appreciated.
You're mashing up PHP and JavaScript. You just need the name of the form field in your $_POST array:
$id = $mysqli->real_escape_string($_POST['$("#id:selected").val()']);
should be:
$id = $mysqli->real_escape_string($_POST['id']);
UPDATE
and change
echo '<option value="new_purchase.php?id=' . $ID . '"';
to
echo '<option value="' . $ID . '"';
UPDATE Part Deaux
and change
ONCHANGE="location =this.options[this.selectedIndex].value;"
to
ONCHANGE="location = 'new_purchase.php?id=' + this.options[this.selectedIndex].value;"
Since you are not submitting a form and just changing a window.location your POST array will be empty. Instead you should read GET parameter, not POST:
$id = $mysqli->real_escape_string($_GET['id']);
try this :
<select name="id" id="id" ONCHANGE="location ='http://site.com/new_purchase.php?id='+this.options[this.selectedIndex].value;" >
<option value="---">---</option>
<?php
foreach( $products as $ID => $info ){
echo '<option value="'.$ID .'"';
echo isset( $id ) && $id == $ID ? ' selected="selected"' : '';
echo '>' . $info['id'] . '</option>'; }
?>
</select>
i guess your database is expecting integer for the column of product id, right? so it is a mismatch of data type.