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I have select, I want user to choose one of its option .according to the selected option the other select show some options. the second select retrieve its value from db via query . the some value should be a selected value from the first select .can any body help?
<select name="select2">
<option value="--">--------</option>
<?php
$stmt = "SELECT * FROM XXX where f=somevalue";
$data = sqlsrv_query ($conn, $stmt);
if ($data == false){}
elseif (sqlsrv_fetch_array($data) == 0){}
else {$data = sqlsrv_query ($conn, $stmt);
while ( $row = sqlsrv_fetch_array( $data, SQLSRV_FETCH_ASSOC)){ ?>
<option value="<?php echo $row["id"] ?>"><?php echo $row["name"]?></option>
<?php }}?>
</select>
Once you got what to show on second select, create an array and pass it to this function
function addToSelect(optionsToAdd) {
sNum = 0
for(option of optionsToAdd) {
sNum += 1
indivOption = document.createElement("option")
indivOption.innerText = option
indivOption.setAttribute("value", sNum)
document.getElementsByClassName("select-class")[0].appendChild(indivOption)
}
}
addToSelect(["choice 1", "choice 2", "choice 3", "choice 4"])<html>
<head></head>
<body>
<select class="select-class">
</select>
</body>
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