字符数据没有从php传递到jquery [英] Character data is not passing from php to jquery
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问题描述
Html文件
子组合框的值由php select查询检索,值为字符。
The values for the sub combobox is retrieved by a php select query and the values are characters.
我试过整数值完全通过。
i have tried with integers values are perfectly passed.
<select name="sub" id="sub">
<option value="">Select semester first</option>
</select>
<select name="staff" id="staff">
<option value="">Select sub first</option>
</select>
Javascript
Javascript
$('#sub').on('change',function(){
var SUB = $(this).val();
if(1){
$.ajax({
type:'POST',
url:'sta.php',
data:'sub='+SUB,//character is not passing.
success:function(html){
$('#staff').html(html);
}
});
}else{
$('#staff').html('<option value="">Select sub first</option>');
}
});
php file
if(isset($_POST["sub"]) && !empty($_POST["sub"]))
{
//Get all city data
$query = mysql_query("SELECT staff_name FROM subject WHERE course_name = ".$_POST['sub']);
//Count total number of rows
$rowCount = mysql_num_rows($query);//It always shows 0
//Display cities list
if($rowCount > 0){
echo '<option value="">Select staff</option>';
while($row = mysql_fetch_assoc($query)){
echo '<option value='.$row['staff_name'].'>'.$row['staff_name'].'</option>';
}
}else{
echo '<option value="">staff not available</option>';//when i tried to execute it comes here
}
}
推荐答案
有简单的语法错误在您的PHP查询中只需将其重写为:
There is simple syntactical error in your query in php just rewrite it as:
$query = mysql_query("SELECT staff_name FROM subject WHERE course_name = '".$_POST['sub']."'");
无论您传递数字以外的数据,总是使用单个倒置逗号,例如 'myData'
包围值。
wherever you pass the data other than numbers always use single inverted comma such as'myData'
to surround the values.
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