[英]PHP - Insert Value with Key from another array into Array in Specific Place
我试图根据从SQL查询接收到的数据创建一个JSON对象作为数组。 目前,我得到的编码JSON是:
[{"firstname":"Student","lastname":"1"},{"firstname":"Student","lastname":"2"},{"firstname":"Student","lastname":"3"}]
我想从另一个数组插入的值,这些值的顺序与上述JSON中的每个数组相对应:(JSON)
["85.00000","50.00000","90.00000"]
因此,JSON应该如下所示:
{"firstname":"Student","lastname":"1","grade":"85.00000"}
我当前的代码:
//Provisional Array Setup for Grades
$grade = array();
$userid = array();
$sqldata = array();
foreach($json_d->assignments[0]->grades as $gradeInfo) {
$grade[] = $gradeInfo->grade;
$userid[] = $gradeInfo->userid;
}
//Server Details
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "moodle";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
foreach($userid as $id) {
$sql = "SELECT firstname, lastname FROM mdl_user WHERE id='$id'";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row
while($row = mysqli_fetch_array($result, MYSQL_ASSOC)) {
$sqldata[] = $row;
}
} else {
echo "ERROR!";
}
}
$sqlr = json_encode($sqldata);
$grd = json_encode($grade);
echo $sqlr;
echo $grd;
mysqli_close($conn);
试试这个代码:
foreach($userid as $x => $id) {
$sql = "SELECT firstname, lastname FROM mdl_user WHERE id='$id'";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row
while($row = mysqli_fetch_array($result, MYSQL_ASSOC)) {
$row['grade'] = $grade[$x];
$sqldata[] = $row;
}
} else {
echo "ERROR!";
}
}
我添加了变量$x
并在$grade
数组上添加$row['grade']
具有相同索引的$row['grade']
function set_column_values($arr, $column_name, $column_values) {
$ret_arr = array_map(function($arr_value, $col_value) use ($column_name) {
$arr_value[$column_name] = $col_value;
return $arr_value;
}, $arr, $column_values);
return $ret_arr;
}
$sqldata = set_column_values($sqldata, 'grades', $grade);
$sqlr = json_encode($sqldata);
var_dump($sqlr);
希望能帮助到你!
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