Question

这是我的三维数组。

我的$ _POST数组。这些是值

$_POST = Array ( 
[9] => Array ( [student_id] => 9 [subject_id] => 6 [class_id] => 2 [mark_obtained] => 40 [mark_obtainable] => 100 ) 
[10] => Array ( [student_id] => 10 [subject_id] => 6 [class_id] => 2 [mark_obtained] => 52 [mark_obtainable] => 100 ) 
[11] => Array ( [student_id] => 11 [subject_id] => 6 [class_id] => 2 [mark_obtained] => 30 [mark_obtainable] => 100 ) 
[12] => Array ( [student_id] => 12 [subject_id] => 6 [class_id] => 2 [mark_obtained] => 68 [mark_obtainable] => 100 ) )

如何循环并将每个数组提交到数据库？

我的列名是键。 “student_id，subject_id，class_id，mark_obtained，mark_obtainable”。

我正在尝试这个，但我不断收到重复的条目.foreach（$ _POST as $ i =＆gt; $ values1）{

foreach ($values1 as $key => $value) {
    $columns = implode(", ",array_keys($values1));
    $values  = implode(", ", $values1);
    $columns = $columns
    $sql = "INSERT INTO `daily_report`($columns) VALUES ($values)";

    if ($conn->multi_query($sql) === TRUE) {
        echo "New records created successfully <br>";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
}

Answer 1

你必须像这样回显foreach循环中的sql变量。

foreach ($_POST as $data => $values) {

echo $sql = "INSERT INTO `daily_report` (student_id, subject_id, class_id,mark_obtained,mark_obtainable,daily_report.date)
VALUES (".$values['student_id'].", ".$values['subject_id'].", ".$values['class_id'].", ".$values['mark_obtained'].",".$values['mark_obtainable'].", now())";

// echo $sqlupdate1 = "UPDATE table SET commodity_quantity=$qty WHERE user='".$rows['user']."' ";
if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

在回显时连接变量。

Answer 2

您不需要三维数组。您可以使用二维数组，并使用$data_array = [ [ 'student_id' => 9, 'subject_id' => 6, 'class_id' => 2, 'mark_obtained' => 40, 'mark_obtainable' => 100 ], [ 'student_id' => 10, 'subject_id' => 6, 'class_id' => 2, 'mark_obtained' => 52, 'mark_obtainable' => 100 ], [ 'student_id' => 11, 'subject_id' => 6, 'class_id' => 2, 'mark_obtained' => 30, 'mark_obtainable' => 100 ], [ 'student_id' => 12, 'subject_id' => 6, 'class_id' => 2, 'mark_obtained' => 30, 'mark_obtainable' => 100 ], ]; foreach($data_array as $data) { $sql = "INSERT INTO `daily_report` (student_id, subject_id, class_id,mark_obtained,mark_obtainable) VALUES ($data['student_id'], $data['subject_id'], $data['class_id'], $data['mark_obtained'],$data['mark_obtainable'])"; if ($conn->query($sql) === TRUE) { echo "New record created successfully"; } else { echo "Error: " . $sql . "<br>" . $conn->error; }逐个插入它们。这是一个例子：

var w = 500;
var h = 250;

var svg = d3.select("body")
            .append("svg")
            .attr("width", w)
            .attr("height", h);

// Values for calculating pdf of normal distribution 
var sigma = 4;
var mu = 0;
var N = 10;
var step = 0.1;
var dataset = [];
var x;

// creating the pdf of the normal distribution and plotting it for -N to N
var C = 1/(sigma*Math.sqrt(2*Math.PI));
for (x=-N; x < N; x += step) {
    var E = (x-mu)/sigma;
    E = -(E*E)/2;
    var d = C*Math.exp(E);
    dataset.push(d);
}


// Scales slightly over fancy, required for features stripped out
var overlap = w*0.1;
var xscale1 = d3.scale.linear().range([0, w/2+overlap]).domain([0, dataset.length-1]).clamp(true);
var xscale2 = d3.scale.linear().range([w/2-overlap, w]).domain([0, dataset.length-1]).clamp(true);



// So specifies the height as max in dataset and it takes up 1/2 the svg
var yscale = d3.scale.linear().domain([0, d3.max(dataset)]).range([h,h/2]);
var area1 = d3.svg.area()
    .x(function(d,i) { return xscale1(i); })
    .y0(h)
    .y1(function(d,i) { return yscale(d); });

svg.append("path")
  .datum(dataset)
  .attr("class", "area1")
  .attr("d", area1)
  .attr("opacity",0.75)
  .call(d3.behavior.drag().on("drag", dragged));

function dragged(d) {

  // Current position:
  this.x = this.x || 0;
  this.y = this.y || 0;
  // Update thee position with the delta x and y applied by the drag:
  this.x += d3.event.dx;
  this.y += d3.event.dy;

  // Apply the translation to the shape:
  d3.select(this)
    .attr("transform", "translate(" + this.x + "," + this.y + ")");
}

如何循环三维数组以将数据插入数据库？

2 个答案: