PHP：我的foreach循环为每个元素提供了两个值，如何阻止它同时回显？

Question

This is my code:

foreach($total_columns as $value){
    echo "<td><b>{$value}</b></td>";
}

Each $value is being echoed twice, one for the numerical key and one for the associative key. How do I stop this from happening?

Answer 1

I guess your array comes from a mysql record? If so, then use mysql_fetch_assoc there!

mysql_fetch_array would output => 
array
(
   [0] => "1"
   "foo" => "1"
   [1] => "2"
   "bar" => "2"
)


mysql_fetch_assoc outputs =>
array
(
   "foo" => "1"
   "bar" => "2"
)

This is probably, where your double entries come from. If so, see the docs here