我的数据库如下,在PHP数组删除空值
date income expenses maincat
2015-02-06 10000 salary
2015-02-05 500 bank charges
2015-02-05 300 rent
2015-02-01 500 bonus
,我使用下面的SQL查询来获得DB值。
$sql= mysqli_query($con,"SELECT maincat as label,income as value FROM transaction where date BETWEEN '$date1' AND '$date2' AND email='$user' GROUP BY maincat") or die ("error3");
和它去,虽然下面的PHP查询,
$arr = array();
While($row1 = mysqli_fetch_assoc($sql)){
$arr[] = $row1;
}
$ar = array_values($arr);
,并给出了把这样的,
[{"label":"income","value":"10000"},{"label":"bank charges","value":""},{"label":"rent","value":""},{"label":"bonus","value":"500"}]
,我传递一个值,Java脚本(莫里斯。 js)将它显示在圆环图中。但它不起作用。当值,
[{"label":"income","value":"10000"},{"label":"bonus","value":"500"}]
它的工作原理fine.i着放“”值“0”,因为没有实际的收入,“银行收费”或“租”(他们的费用)没有任何方法删除此空值({“标签”:“银行手续费”,“值”:“”})从上面滚出去放为,
[{"label":"income","value":"10000"},{"label":"bonus","value":"500"}]
和我morris.js代码如下所示,
<script>
Morris.Donut({
element: 'donut',
resize : true,
data : <?php echo json_encode($ar); ?>,
backgroundColor: '#0011',
labelColor: 'black',
colors:[
'#A4A4A4','#FE2E64','#0B610B','#0B615E',
'#FF8000','#088A68','#4B8A08','#A9D0F5',
'#5F4C0B','#F3F781','#81BEF7','#04B431',
'#D7DF01','#BE85F7','#BE59F7','#BE81F7',
'#F4FA58','#0431B4','#D8D8D8','#4C0B5F',
'#086A87','#F7D358','#DF7401','#B18904',
'#045FB4',
],
});
</script>
谢谢..
你可能不会首先从数据库中查询它们。只需在您的查询中添加'AND income!=''' – user1950929 2015-02-08 08:39:26