Count characters from string position x to string position y

Question

how do i find how many characters are between the position of a string to another

For example the string might be: brown fox

How do i find how many characters are between 'r' and 'f'?

Thanks in advance

Answer 1

$r_pos = strpos($str, 'r');
$distance = strpos($str, 'f', $r_pos) - $r_pos - 1;
echo $distance;

Answer 2

Using strpos ( or stripos for case- insensitive searching), get the position of "r", and the position of "f". Then, subtract the two.

$phrase = "brown fox";
echo stripos( $phrase, "f" ) - stripos( $phrase, "r" );

If your sentence can contain an "f" prior to an "r", you can provide an offset for the "f" by passing in the position of "r" as the third argument to stripos :

$r = stripos( $phrase, "r" );
$f = stripos( $phrase, "f", $r );

echo $f - $r;

Answer 3

$str = "brown fox";
strpos($str,'f') - strpos($str,'r');