Question

请帮助我解决这个问题。

注意：未定义的变量：第10行的C：\ xampp \ htdocs \ ecommerce \ function \ fuction.php中的con

警告：mysqli_query（）期望参数1为mysqli，在第10行的C：\ xampp \ htdocs \ ecommerce \ function \ fuction.php中给出null

警告：mysqli_fetch_array（）要求参数1为mysqli_result，在第11行的C：\ xampp \ htdocs \ ecommerce \ function \ fuction.php中给出null

<?php
$host="localhost";
$user_id="root";
$password="";
$con = mysqli_connect($host,$user_id,$password) OR die("not connected.... ");
$db = mysqli_select_db($con,'ecommerce') OR die ("not connected...");
?>




<?php
function getbrands()
{
$fetch_brand="SELECT * FROM brands";


        $run=mysqli_query($con,$fetch_brand);
    while($row=mysqli_fetch_array($run));

         $brands_id=$row[0];
         $brands_title=$row[1];

         echo "<h4 align='center' style='margin:0px'>

         <a href='ecommerce.php?brands=$brands_id'>$brands_title</a></h4><hr>";


    }



?>

Answer 1

试试这个：

  function supportsSVG() {
        return !!document.createElementNS && !!document.createElementNS('http://www.w3.org/2000/svg', "svg").createSVGRect;
    }
var token = $('#_token').val();
$.ajax({
    url: 'getShares',
    type: 'post',
    //  dataType:'json',
    data: {
        _token: token,

    },
    success: function (data, textStatus, jQxhr) {

        var DBData = jQuery.parseJSON(data);
        UserGroupsBar = new AmCharts.AmSerialChart();
       // var Data = [{}];

        UserGroupsBar.dataProvider = DBData;
        UserGroupsBar.startDuration = 1;
        UserGroupsBar.categoryField = "gid";

        $.each(DBData, function (i, item) {
          //  alert(item['Users']);
            if (item['Users'] > 0) {

               // Data[0][item['gid'] = item['Users']];
                var UserGroupGraph = new AmCharts.AmGraph();
                UserGroupGraph.id = item['gid'];
                UserGroupGraph.valueField = item['Users'];
                UserGroupGraph.title = item['gid'];
                UserGroupGraph.type = "column";
                UserGroupGraph.lineAlpha = 0;
                UserGroupGraph.fillAlphas = 1;
                UserGroupGraph.balloonText = "[[title]]: [[value]]";
                UserGroupsBar.addGraph(UserGroupGraph);
            }
        });

        UserGroupsBar.write("BarChart");

        var GroupValueAxis = new AmCharts.ValueAxis();
        GroupValueAxis.axisColor = "#DADADA";
        GroupValueAxis.gridAlpha = 0.1;
        GroupValueAxis.integersOnly = true;
        UserGroupsBar.addValueAxis(GroupValueAxis);
        UserGroupsBar.outlineColor = "#FFFFFF";
        UserGroupsBar.outlineAlpha = 0.2;
        UserGroupsBar.outlineThickness = 2;
        UserGroupsBar.startDuration = supportsSVG() ? 1 : 0;
        UserGroupsBar.depth3D = supportsSVG() ? 20 : 0;
        UserGroupsBar.angle = supportsSVG() ? 30 : 0;
        //Root Causes Legend
        GroupLegend = new AmCharts.AmLegend();
        UserGroupsBar.addLegend(GroupLegend, "Legend");
        GroupLegend.valueText = "";
        GroupLegend.align = "center";
        GroupLegend.position = "absolute";
        GroupLegend.marginTop = 30;
        GroupLegend.markerType = "circle";
        GroupLegend.labelWidth = 180;
        GroupLegend.fontSize = 10;
        GroupLegend.verticalGap = 20;
        // WRITE
        UserGroupsBar.write("BarChart");
    }


});

Answer 2

这是使用mysqli连接到mysql的方法：

<?php
$servername = "localhost";
$username = "root";
$password = "";

// Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 
echo "Connected successfully";
?>

mysqli_query，mysqli_fetch_array和php

2 个答案: