在尝试使用selectize multiselect时，我试图使某些选项开始为选定状态。我正在使用PHP从数据库中提取一些信息，然后将信息转换为JS数组。当我尝试“初始化Selectize控件”时，出现错误消息 <?
//Query
$courseQuery = $page->dbf->query("SELECT * FROM courses");
$curCourses = $page->dbf->query("SELECT * FROM recipesToCourse WHERE recipeId = '$recID'");
$course = [];
while($crs = $courseQuery->fetch_object()) {
$course[$crs->id] = $crs->title;
}
$jsCourse = json_encode($course);
$crsList = [];
while($cr = $curCourses->fetch_object()) {
$crsList[] = $cr->courseId;
}
$jsCrsList = json_encode($crsList);
?>
<script>
//Enable multiselect
$('#course').selectize({
maxItems: 10
});
</script>
<select id="course" name="course[]" multiple>
<option value="">-- Select Courses --</option>
<?
foreach($course as $key=>$value) {
?>
<option value="<?=$key?>"><?=$value?></option>
<?
}
?>
</select>
<script>
var courses = '<?echo $jsCourse?>';
courses = JSON.parse(courses);
var crsList = '<?echo $jsCrsList?>';
crsList = JSON.parse(crsList);
// initialize the Selectize control !!My ERROR!!
var $select = $('#course').selectize(options);
// fetch the instance
var selectize = $select[0].selectize;
index = 0;
var select = document.getElementById('course');
for(var i = 1; i < Object.keys(courses).length + 1; i++) {
console.log('checking...');
if(crsList[index] == i) {
console.log('adding');
selectize.addItem(courses[i]);
index++;
}
}
</script>
。我该怎么做才能将项目添加到多选项目中？
c