没有获得金钱字符串数组的最大和最小值

Question

This is my array

Array ( [0] => $30.00 [1] => $200.00 [2] => $138.00 [3] => $100.00 [4] => $30.00 
[5]=>$30.00 [6] => $30.00 )

Trying to get the max and min value from this array

echo $maxprice = max($list);
echo $minprice = min($list);

I get $30.00 for max and $100.00 for min

I am guessing this is due to the values are in money string.

Can someone please tell me how I could get the real max and min for this array? Is this really due to money string?

Thanks in advance

Note This array is stripped down from a multidimensional array. If it was normal array, it would be straightforward

Answer 1

You need to use decimal values (without the "$") in your array. The dollar sign should only be applied when outputting to display.

To get the string converted to floats, you can just array_walk() the array.

If on PHP 5.3 or greater, I like to use closures like this

array_walk($array, function (&$value, $key) {
   $value = (float)ltrim($value, '$');
});

If in older version of PHP, you would need to define a separate function and call the function in array_walk like this

array_walk($array, 'strip_dollar_signs');

function strip_dollar_signs (&$value, $key) {
    $value = (float)ltrim($value, '$');
}

Then just sort your array as you typically would

sort($array, SORT_NUMERIC);