求教php如何创建一个带键名的空数组，后期再赋值

Question

php数组

Answer 1

首先你创建数组的格式就不对.$strkeys= ['tagname'=>'',
           'descr'=>'','unit'=>''
];
$days=30;
for($w= 1; $w<= $days; $w++)
{
    $strkeys[$w.'日']='';
}
$strkeys['Total']='';
print_r($strkeys);

Answer 2

[] 格式是PHP 5.4 及以上版本才有的数组简写格式

Answer 3

$strkeys= array('tagname'=>'','descr'=>'','unit'=>'');
$days = 31;
for($w= 1; $w<= $days; $w++)
{
$strkeys[$w.'日'] = '';
}
$strkeys['Total'] = '';
$excelres[]= $strkeys;print_r($excelres);Array
(
    [0] => Array
        (
            [tagname] => 
            [descr] => 
            [unit] => 
            [1日] => 
            [2日] => 
            [3日] => 
            [4日] => 
            [5日] => 
            [6日] => 
            [7日] => 
            [8日] => 
            [9日] => 
            [10日] => 
            [11日] => 
            [12日] => 
            [13日] => 
            [14日] => 
            [15日] => 
            [16日] => 
            [17日] => 
            [18日] => 
            [19日] => 
            [20日] => 
            [21日] => 
            [22日] => 
            [23日] => 
            [24日] => 
            [25日] => 
            [26日] => 
            [27日] => 
            [28日] => 
            [29日] => 
            [30日] => 
            [31日] => 
            [Total] => 
        ))