我正在尝试将所选选项的值放入我的 PHP 中,以便我可以在查询中使用它。但是它不断返回:null
我的代码:
<form onsubmit="getAlles()" method = "get">
<select name="optionsDrop" id = "optionsDrop" class="buttons">
</select>
<input name="submitbutton" type="submit" value="submit" onclick = 'refresh()' />
</form>
Javascript:
window.onload= function getAlles()
{
$.getJSON('js/getVoorraad.php', function (data) {
refresh('#voorraadTable', data);
});
function refresh (tbBodyId, data) {
var i, j;
arrHTML = [];
console.log(data);
for (i = 0; i < data.length; i++) {
arrHTML.push('<tr>');
for (j= 0; j < data[i].length; j++) {
arrHTML.push('<td>' + data[i][j] + '</td>');
}
arrHTML.push('<td>' + "<input type = 'number' value = '1' min = '1' style=\"width: 40px;\" onKeyUp=\"this.style.width = Math.max(40,this.value.length*13)+'px';\"></input>" + '</td>');
arrHTML.push('<td>' + "<button class='but' onClick = 'replyClick(this.id)'>Voeg toe</button>" + '</td>');
arrHTML.push('</tr>');
}
$(tbBodyId).html(arrHTML.join(''));
}
}
这些选项是从数据库中插入的。我想要做的是:从选择框中选择一个选项,然后将其提供给 PHP。然后我将所选选项插入到 SQL 中的 WHERE 语句中。
PHP代码:
<?php
header('Content-type: application/json');
$selectedoption = $_GET['optionsDrop'];
var_dump($_GET);
var_dump($selectedoption);
$accdbFilename = "C:\Users\Me/Proftaak DBB.accdb";
$connection = odbc_connect("Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=$accdbFilename", "", "");
$qFormat = <<<EOQ
select l.Naam, ac.catomschrijving, Aantal
from voorraad vo, locatie l, artikelcategorie ac
where vo.typeNr = ac.typeNr
and l.locatieNr = vo.locatieNr
and l.Naam = '%s'
EOQ;
var_dump($qFormat);
$query = sprintf($qFormat, $selectedoption);
var_dump($query);
$result = odbc_exec($connection, $query);
$rs = [];
for ($rownr = 0; odbc_fetch_row($result); $rownr++) {
for($colnr = 1; $colnr <= odbc_num_fields($result); $colnr++) {
$rs[$rownr][] = odbc_result($result, $colnr);
}
}
echo json_encode($rs);
odbc_close($connection);
?>
但是它一直在说:
未定义索引:未定义索引:optionsDrop in C:\Users\Me\voorraadbeheer\js\getVoorraad.php on line 4
array(0) { } NULL
如何从选择框中的选项中获取值或文本。那我可以用吗?