PHP - 创建一个默认对象以替换数组中的空值 - PHP - Creating a default object to substitute an empty value inside an array

PHP - Creating a default object to substitute an empty value inside an array

我创建了一个从CSV文件导入它的数组。

$csv = str_getcsv(file_get_contents('table.csv'));

$csv数组给出此输出

Array
(
Values
    [90] => 
    [91] => 
    [92] => 
    [93] => 
    [94] => 
    [95] => 
    [96] => 
    [97] => 
    [98] => 136
    [99] => 384
    [100] => 431
)

如何将数组内的所有空对象（从 90 到 97）替换为符号/符号（例如-）？

foreach($csv as $key=>$value)
{
  if($csv[$key]=="")
  {
    $csv[$key]="-";
   }
}
print_r($csv);

输出

Array
(
Values
    [90] => -
    [91] => -
    [92] => -
    [93] => -
    [94] => -
    [95] => -
    [96] => -
    [97] => -
    [98] => 136
    [99] => 384
    [100] => 431
)