How to get the length of longest string in an array

Question

Say I have this array:

$array[] = \'foo\';
$array[] = \'apple\';
$array[] = \'1234567890;

I want to get the length of the longest string in

Answer 1

Sure:

function getmax($array, $cur, $curmax) {
  return $cur >= count($array) ? $curmax :
    getmax($array, $cur + 1, strlen($array[$cur]) > strlen($array[$curmax])
           ? $cur : $curmax);
}

$index_of_longest = getmax($my_array, 0, 0);

No loop there. ;-)

Answer 2

try

$maxlen = max(array_map('strlen', $ary));

Answer 3

Loop through the arrays and use strlen to verify if the current length is longer than the previous.. and save the index of the longest string in a variable and use it later where you need that index.

Something like this..

$longest = 0;
for($i = 0; $i < count($array); $i++)
{
  if($i > 0)
  {
    if(strlen($array[$i]) > strlen($array[$longest]))
    {
      $longest = $i;
    }
  }
}