PHP string The number of uppercase letters, lowercase letters, spaces, punctuation numbers in English text

For information about an English text, count the number of uppercase letters, lowercase letters, spaces, and punctuation marks.

<?php
$manuscript = "Where There is a would, there is a."; /string literal
$smallLetter = 0;
$capitalLetter = 0;
$blank = 0;
$punctuation = 0;

$num =strlen ($manuscript);
$arr =str_split ($manuscript);//string split into arrays
foreach ($arr as $key = $value)
{
if ($value = = ")
{
$blank +=1;
}
if (' A ' <= $value && $value <= ' z ')
{
$smallLetter +=1;
}
if (' A ' <= $value && $value <= ' Z ')
{
$capitalLetter +=1;
}
}
$punctuation = $num-$smallLetter-$capitalLetter-$blank;

echo ' Lowercase letter number: '. $smallLetter. " <br> ";
Echo ' Number of capitals: '. $capitalLetter. " <br> ";
Echo ' Number of spaces: '. $blank. " <br> ";
Echo ' Punctuation number: '. $punctuation. ' <br> ";
?>

PHP string The number of uppercase letters, lowercase letters, spaces, punctuation numbers in English text