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[英]Setting value with `textarea.value("")` throws “`TypeError`: `textarea.value` is not a function”
[英]Store textarea.value via settimer-function to MySQL database without losing newlines
在主体上载时,我设置了一个计时器,每3秒自动上载音符,如下所示:
<body onload="setInterval(uploadNote,3000);current = 1;">
并且uploadNote的代码是:
function uploadNote() {
var note = current+document.getElementById(\'note\').value; //current is the number of the note selected\' because echoed
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){}
}
xmlhttp.open("GET","uploadnote.php?q="+note,true);
xmlhttp.send();
}
然后是这个php代码:
$note = $_GET["q"]; //contains both notenumber as first digit and note
echo($note."\n"); //for debugging reasons
$notenumber = substr($note, 0, 1);
$notecontent = substr($note, 1, strlen($note));
$notecontent = str_replace("'","''",$notecontent);
$notecontent = nl2br($notecontent);
echo($notecontent); //for debugging reasons
$request = 'UPDATE notes SET note'.$notenumber.' = "'.$notecontent.'" WHERE mail LIKE "'.$email.'"';
$result = mysql_query($request);
现在的问题是,textarea中的换行符已被完全擦除,因此php-snippet的结果是没有换行符的文本的两倍,数据库中也是如此。 但是,当我将换行符直接插入数据库时,在换行符中显示换行符没有问题。
帮助将不胜感激。
编辑:更新了uploadNote()函数:
function uploadNote() {
var note = current+document.getElementById(\'note\').value;
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){}
}
xmlhttp.open("POST","uploadnote.php",true);
xmlhttp.send("note="+note);
}
和PHP:
$note = $_POST["note"];
echo($note."\n");
$notenumber = substr($note, 0, 1);
$notecontent = substr($note, 1, strlen($note));
$notecontent = mysql_real_escape_string($notecontent);
echo($notecontent);
$request = 'UPDATE notes SET note'.$notenumber.' = "'.$notecontent.'" WHERE mail LIKE "'.$email.'"';
$result = mysql_query($request);
现在的问题是什么都没有。 该注释不会在MySQL数据库中更新。
您的代码存在的问题:
mysql_real_escape_string()
。 <br>
是错误的。
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