<分区>
我有以下问题，
我正在将一个 json_encoded 数据数组从 PHP 发送到 javascript。我从 PHP 接收到的实际 JSON 如下所示，
{
"route": "1(M)A",
"startSignal": "AN1",
"startX": 100,
"startY": 320,
"direction": "down",
"endSignal": "AN3",
"endX": 1100,
"endY": 320,
"1AT": {
"length": "100",
"xStart": 100,
"yStart": 320,
"xFinish": 133.33333333333,
"yFinish": 320
},
"1BT": {
"length": "100",
"xStart": 133.33333333333,
"yStart": 320,
"xFinish": 166.66666666667,
"yFinish": 320
},
"1CT": {
"length": "100",
"xStart": 166.66666666667,
"yStart": 320,
"xFinish": 200,
"yFinish": 320
},
"1DT": {
"length": "100",
"xStart": 200,
"yStart": 320,
"xFinish": 233.33333333333,
"yFinish": 320
}
}
在我的 .JS 文件中，我得到如下“echo json_encode($dataArray)”，
$.ajax({
url: "visualiser/visualiser_RouteList.php",
data: "JSON",
async: false,
success: function(data){
console.log(data);
}
});
问题是由于某种原因，ajax 以下列方式读取 json..(JSON 中的每个字符都存储为数组元素..所以我无法检索关联名称的特定值，例如，获取“1(M)A” 来自关联名称“route”的字符串值..
data[0] = "{"
data[1] = " \" "
data[2] = "r"
data[3] = "o"
我哪里错了？
============================================= =============================
收到意见后进一步修改，
谢谢大家，我确实将数据更改为 'dataType = "json"' 但它仍然不起作用..我真的很想在执行 'console.log(数据)但没有打印出来所以我的 PHP 源代码中的 $array 一定有问题，不确定是否有人愿意看但我在这里发布我的 php 源代码..(很抱歉我是 PHP 的菜鸟..除了拔头发，我似乎什么也做不了)
============================================= ==============================
<?php
// Route registration form processing php
// accepts a serialized data from myRoute.js
//header('Content-Type: application/json');
include_once ("dbConnect.php");
//$sql="SELECT * FROM route";
$routeStarts = "SELECT id, idSignal, km, line_name, direction, route.type
FROM route
JOIN signals
ON startSignal = idSignal";
$routeEnds = "SELECT id, idSignal, km, line_name, direction, route.type
FROM route
JOIN signals
ON endSignal = idSignal";
$routeTracks = "SELECT idRoute, signalName, routeTrack.idTrack, length, firstTrack, pointTrack, prevTrack
FROM routeTrack
JOIN track
ON routeTrack.idTrack = track.idTrack";
/*ORDER BY idRoute";*/
$pointTracks = "SELECT idRoute, routeTrack.idTrack, aLocation, bLocation, aLine, bLine, aTrack, bTrack, type
FROM routeTrack
JOIN points
ON routeTrack.idTrack = aTrack";
$sqlMax = "SELECT MAX(km) FROM signals";
$sqlMin = "SELECT MIN(km) FROM signals";
$max = mysqli_query($con, $sqlMax);
$min = mysqli_query($con, $sqlMin);
$start = mysqli_query($con, $routeStarts);
$rowMax = mysqli_fetch_array($max);
$rowMin = mysqli_fetch_array($min);
$range = $rowMax[0] - $rowMin[0];
// For each route picks up the start signal
while($row1 = mysqli_fetch_array($start)){
$resultArray = array();
$routeName = $row1['id'];
$startSig = $row1['idSignal'];
$startX = ((($row1['km'] - $rowMin[0]) / $range)*1000)+100;
$startY = getYcoordinate($row1['line_name']);
$direction = $row1['direction'];
$resultArray['route'] = $routeName;
$resultArray['startSignal'] = $startSig;
$resultArray['startX'] = $startX;
$resultArray['startY'] = $startY;
$resultArray['direction'] = $direction;
//picking up the end signal for the same route
$end = mysqli_query($con, $routeEnds);
while($row2 = mysqli_fetch_array($end)){
if ($row2['id'] == $routeName){
$endSignal = $row2['idSignal'];
$endX = ((($row2['km'] - $rowMin[0]) / $range)*1000)+100;
$endY = getYcoordinate($row2['line_name']);
$resultArray['endSignal'] = $endSignal;
$resultArray['endX'] = $endX;
$resultArray['endY'] = $endY;
}
}
//now filtering out the track for the particular route , non-point
if ($resultArray['startY'] == $resultArray['endY']){
$tracks = mysqli_query($con, $routeTracks);
while($row3 = mysqli_fetch_array($tracks)){
if ($row3['idRoute'] == $routeName && $row3['firstTrack'] == 1 ){
$xFinish = getXfinish($range, $row3['length']);
$resultArray[$row3['idTrack']] = ['length'=>$row3['length'],
'xStart'=>$startX,
'yStart'=>$startY,
'xFinish'=>$startX + $xFinish,
'yFinish'=>$startY ];
} else if ($row3['idRoute'] == $routeName && $row3['firstTrack'] != 1 ){
foreach ($resultArray as $key => $value) {
if ($row3['prevTrack'] == $key){
$prevXstart = $resultArray[$key]['xFinish'];
$prevYstart = $resultArray[$key]['yFinish'];
}
}
$xFinish = getXfinish($range, $row3['length']);
$resultArray[$row3['idTrack']] = ['length'=>$row3['length'],
'xStart'=>$prevXstart,
'yStart'=>$prevYstart,
'xFinish'=>$prevXstart + $xFinish,
'yFinish'=>$prevYstart
];
}
}
//now filtering out the track for plotting point tracks
} else {
$tracks = mysqli_query($con, $routeTracks);
while($row3 = mysqli_fetch_array($tracks)){
if ($row3['idRoute'] == $routeName && $row3['firstTrack'] == 1 && $row3['pointTrack'] != 1){
$xFinish = getXfinish($range, $row3['length']);
$resultArray[$row3['idTrack']] = ['length'=>$row3['length'],
'xStart'=>$startX,
'yStart'=>$startY,
'xFinish'=>$startX + $xFinish,
'yFinish'=>$startY ];
} else if ($row3['idRoute'] == $routeName && $row3['firstTrack'] != 1 && $row3['pointTrack'] != 1){
foreach ($resultArray as $key => $value) {
if ($row3['prevTrack'] == $key){
$prevXstart = $resultArray[$key]['xFinish'];
$prevYstart = $resultArray[$key]['yFinish'];
}
}
$xFinish = getXfinish($range, $row3['length']);
$resultArray[$row3['idTrack']] = ['length'=>$row3['length'],
'xStart'=>$prevXstart,
'yStart'=>$prevYstart,
'xFinish'=>$prevXstart + $xFinish,
'yFinish'=>$prevYstart
];
// first track and point track
} else if ($row3['idRoute'] == $routeName && $row3['firstTrack'] == 1 && $row3['pointTrack'] == 1){
$pointTrack = mysqli_query($con, $pointTracks);
// not first track and point track
} else if ($row3['idRoute'] == $routeName && $row3['firstTrack'] != 1 && $row3['pointTrack'] == 1){
foreach ($resultArray as $key => $value) {
if ($row3['prevTrack'] == $key){
$prevXstart = $resultArray[$key]['xFinish'];
$prevYstart = $resultArray[$key]['yFinish'];
}
}
$turnPoint = getXfinish($range, ($row3['length']/2));
$pointTrack = mysqli_query($con, $pointTracks);
while($row4 = mysqli_fetch_array($pointTrack)){
if ($row4['idTrack'] == $row3['idTrack']){
$yTurnEnd = getYcoordinate($row4['bLine']);
}
}
if ($row1['direction'] == 'down'){
$resultArray[$row3['idTrack']] = ['xStart'=>$prevXstart,
'yStart'=>$prevYstart,
'xTurnStart'=> $prevXstart + $turnPoint,
'yTurnStart'=> $prevYstart,
'xFinish' => $prevXstart + $turnPoint + 50,
'yFinish' => $yTurnEnd
];
} else {
$resultArray[$row3['idTrack']] = ['xStart'=>$prevXstart,
'yStart'=>$prevYstart,
'xTurnStart'=> $prevXstart - $turnPoint,
'yTurnStart'=> $prevYstart,
'xFinish' => $prevXstart - $turnPoint -50,
'yFinish' => $yTurnEnd
];
}
}
}
}
//print_r($resultArray);
//header('Content-Type: application/json');
echo json_encode($resultArray);
unset($resultArray);
}
function getYcoordinate($line_name){
if ($line_name == 'downSuburban'){
$y= (800/20) * 8; // down Suburban
} else if ($line_name == 'upSuburban'){
$y= (800/20) * 10; // up Suburban
} else if ($line_name =='downMain'){
$y= (800/20) * 12; // down Main
} else if ($line_name == 'upMain'){
$y= (800/20) * 14; // up Main
}
return $y;
}
function getXfinish($trackRange, $trackLength){
return ($trackLength/($trackRange*1000))*1000;
}
// $dataArray = array();
// $dataArray[] = array('idRoute'=>$row['id'], 'startSignal'=>$row['startSignal']);
mysqli_close($con);
?>