<html><body><?php//student interface$file = fopen("subject.csv","r");$subjects = fgetcsv($file);fclose($file);//puts the csv file provided into a 2d array$studentTable = array();if (($handle = fopen("students.csv", "r")) !== FALSE) { while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) { $studentTable[] = $data; } fclose($handle);}//creates list that will store list of girls emails$usernames = array();//runs through studentTable and appends emails to toEmail. for ($I = 0; $I < sizeof($studentTable); $I++){ array_push($usernames, $studentTable[$I][0]); } ?><script type="text/javascript"> // Using PHP implode() function to turn the php list into a javascript listvar subjects = <?php echo '["' . implode('", "', $subjects) . '"]' ?>; var usernames = <?php echo '["' . implode('", "', $usernames) . '"]' ?>; var select = document.getElementById("usernames");for(var i = 0; i < usernames.length; i++) { var opt = usernames[i]; var el = document.createElement("option"); el.textContent = opt; el.value = opt; select.appendChild(el);}var subchoice = [];subchoice.push(document.getElementById("choice1"), document.getElementById("choice2"), document.getElementById("choice3"), document.getElementById("choice4"), document.getElementById("choice5"));for(var x = 0; x < subchoice.length; x++) { for(var i = 0; i < subjects.length; i++) { var opt = subjects[i]; var el = document.createElement("option"); el.textContent = opt; el.value = opt; subchoice[x].appendChild(el); }}var six = [];six = subjects;six.push("null");var select = document.getElementById("choice6");for(var i = 0; i < six.length; i++) { var opt = six[i]; var el = document.createElement("option"); el.textContent = opt; el.value = opt; select.appendChild(el);}</script> 我无法在下拉选项卡中显示任何内容。下拉列表应该是主题或用户名列表中的项目。但是，即使我认为我的编码正确，也没有任何反应。它给了我这个错误消息：“Uncaught SyntaxError: Unexpected token '<'” 我已经寻找这个额外的令牌但似乎找不到它，请帮忙！
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<html>
<body>
<?php
//student interface
$file = fopen("subject.csv","r");
$subjects = fgetcsv($file);
fclose($file);
//puts the csv file provided into a 2d array
$studentTable = array();
if (($handle = fopen("students.csv", "r")) !== FALSE) {
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
$studentTable[] = $data;
} fclose($handle);
}
//creates list that will store list of girls emails
$usernames = array();
//runs through studentTable and appends emails to toEmail.
for ($I = 0; $I < sizeof($studentTable); $I++){
array_push($usernames, $studentTable[$I][0]);
}
?>
<h2> Select your subjects! </h2>
<form method="POST" action='handlestudents.php'>
<p> Select your name </p>
<select id='userN' name='userN'>
<option selected="selected">Choose one</option>
<?php
// Iterating through the product array
foreach($usernames as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
</select>
<p> Select your 1st choice subject </p>
<select id='choice1' name='choice1'>
<option selected="selected" >Choose a subject</option>
<?php
// Iterating through the product array
foreach($subjects as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
</select>
<p> Select your 2nd choice subject </p>
<select id='choice2' name='choice2'>
<option selected="selected" >Choose a subject</option>
<?php
// Iterating through the product array
foreach($subjects as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
</select>
<p> Select your 3rd choice subject </p>
<select id='choice3' name='choice3'>
<option selected="selected" >Choose a subject</option>
<?php
// Iterating through the product array
foreach($subjects as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
</select>
<p> Select your 4th choice subject </p>
<select id='choice4' name='choice4'>
<option selected="selected" >Choose a subject</option>
<?php
// Iterating through the product array
foreach($subjects as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
</select>
<p> Select your 5th choice subject </p>
<select id='choice5' name='choice5' >
<option selected="selected" >Choose a subject</option>
<?php
// Iterating through the product array
foreach($subjects as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
</select>
<p> Select your 6th choice subject (none is an option) </p>
<select id='choice6' name='choice6'>
<option selected="selected" >Choose a subject</option>
<?php
// Iterating through the product array
foreach($subjects as $item){
?>
<option value="<?php echo strtolower($item); ?>"><?php echo $item; ?></option>
<?php
}
?>
<option value = ""> None </option>
</select>
<input type="submit" value="Submit">
</form>
</body>
</html>
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