php - Increment char in for loop -

i know how can make : php function exists ?

for ($i=0; $i < 26; $i++) {      // echoes "a" ... b ... c ... } 

php supports perl-style character incrementing

so use

for($char = 'a'; $char !== 'iw'; $char++) {     echo $char, php_eol; } 

which print out a iv.... important use !== in terminating comparison though