php mysql用数组更新值[关闭]

Question

$array['a']['b']=50;
mysql_query("update table set name=name-$array['a']['b']");

It show's error. Why it is not working? How fix it?

Thanks

Answer 1

PHP's parser is not "greedy".

echo "$arr[a][b]"

is actually parsed as if it was:

echo $arr['a'];
echo '[b]';

and would produce as output

Array[b]

You need to use the {} notation for this to work as you've written it:

mysql_query("update table set name=name-{$array['a']['b']}");
                                        ^--              ^--