我正在尝试将PHP变量转换为JS变量,因此我可以在我正在制作的游戏中使用它。当我检查地图代码时,它只是undefined
。提前致谢。仅供参考PHP。
<script>
var mapCode;
var used;
var active;
function downloadCode() {
$.ajax({
type: 'GET',
url: 'getMapCode.php',
data: {
mapCode: $mapCode,
used: $used,
active: $active,
},
dataType: "text",
});
}
</script>
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
// Create connection
$conn = mysqli_connect($servername, $username, $password);
mysqli_select_db($conn, $dbname);
// Check connection
if (!$conn)
{
die("Connection failed: " . mysqli_connect_error());
}
// echo "Connected successfully";
$query = "SELECT mapCode FROM mapCodes";
$result = mysqli_query($conn, $query);
$mapCode = mysqli_fetch_row($result);
$query1 = "SELECT used FROM mapCodes";
$result1 = mysqli_query($conn, $query1);
$used = mysqli_fetch_row($result1);
$query2 = "SELECT active FROM mapCodes";
$result2 = mysqli_query($conn, $query2);
$active = mysqli_fetch_row($result2);
mysqli_close($conn);
?>
据我所知,PHP代码很可怕,但它确实有效,而且当整个工作正常时,我会“非常好”
答案 0 :(得分:1)
如果文件扩展名为.php
而不是.js
,那么这应该有效
<script>
function downloadCode() {
$.ajax({
type: 'GET',
url: 'getMapCode.php',
data: {
mapCode: "<?php echo $mapCode; ?>",
used: "<?php echo $used; ?>",
active: "<?php echo $active; ?>",
},
dataType: "text",
});
}
</script>
如果你有.js
文件,那么在将你的js包含在.php
文件中之前声明javascript变量
<script>
var mapCode = "<?php echo $mapCode; ?>";
var used = "<?php echo $used; ?>";
var active = "<?php echo $active; ?>";
</script>
然后在.js
文件中,您将轻松获得
<script>
function downloadCode() {
$.ajax({
type: 'GET',
url: 'getMapCode.php',
data: {
mapCode: mapCode,
used: used,
active: active,
},
dataType: "text",
});
}
</script>
答案 1 :(得分:0)
你只需要使用&lt;?php echo $ mapCode;?&gt;而是$ mapCode。 .... php变量无法打开Php标签
答案 2 :(得分:0)
我当前的项目实际上处理了很多ajax调用, 这是我用来与服务器通信的简化版本:
// php
// needed functions
function JSONE(array $array)
{
$json_str = json_encode( $array, JSON_NUMERIC_CHECK );
if (json_last_error() == JSON_ERROR_NONE)
{
return $json_str;
}
throw new Exception(__FUNCTION__.': bad $array.');
}
function output_array_as_json(array $array)
{
if (headers_sent()) throw new Exception(__FUNCTION__.': headers already sent.');
header('Content-Type: application/json');
print JSONE($array);
exit();
}
// pack all data
$json_output = array(
'mapCode' => $mapCode,
'used' => $used,
'active' => $active
);
// output/exit
output_array_as_json( $json_output );
// javascript
function _fetch()
{
return $.ajax({
url: 'getMapCode.php', // url copied from yours
type: 'POST',
dataType: 'json',
success: function(data, textStatus, req){
console.log('server respond:', data);
window.mydata = data;
},
error: function(req , textStatus, errorThrown){
console.log("jqXHR["+textStatus+"]: "+errorThrown);
console.log('jqXHR.data', req.responseText);
}
});
}
window.mydata = null;
_fetch();
我没有对此进行过测试,但请告诉我,我会为您解决此问题。
答案 3 :(得分:0)
我是如何得到你的,你需要从ajax请求得到结果,要做到这一点,你应该首先设置你的php输出你的结果,所以ajax可以得到像这样的php输出结果:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
// Create connection
$conn = mysqli_connect($servername, $username, $password);
mysqli_select_db($conn, $dbname);
// Check connection
if (!$conn)
{
die("Connection failed: " . mysqli_connect_error());
}
// echo "Connected successfully";
$query = "SELECT mapCode FROM mapCodes";
$result = mysqli_query($conn, $query);
$mapCode = mysqli_fetch_row($result);
$query1 = "SELECT used FROM mapCodes";
$result1 = mysqli_query($conn, $query1);
$used = mysqli_fetch_row($result1);
$query2 = "SELECT active FROM mapCodes";
$result2 = mysqli_query($conn, $query2);
$active = mysqli_fetch_row($result2);
mysqli_close($conn);
// Outputing results:
echo json_encode(array('mapCode'=>$mapCode[0], 'used'=>$used[0], 'active'=>$active[0]));
?>
然后在ajax中,在ajax完成后使用success
监听返回消息:
<script>
var mapCode;
var used;
var active;
function downloadCode() {
$.ajax({
type: 'GET',
url: 'getMapCode.php',
data: {
/** Your data to send to server **/
},
dataType: "text",
success: function(data) { /** Here is data returned by php echo **/
var temp = $.parseJSON(data);
mapCode = temp['mapCode'];
used = temp['used'];
active = temp['active'];
}
});
}
</script>