php - Fastest way to get the next element in a string from a needle -

i'll start off code:

$characterset = 'abcdefg'; $character    = 'a'; 

say have 2 variables, characterset , character, , want next character, did:

$characterset = 'abcdefg'; $character    = 'a'; $ncharacter   = $characterset[ strpos($characterset, $character) + 1 ]; 

and worked, i'm using method has thousands of times per / second, , using xdebug + webgrind result many, many calls strpos, making function go lot slower should going, realise doing math in language faster doing function calls math, , have tried using:

$character  = 'a'; $ncharacter = chr( ord($character) + 1 ); 

and work, gives me many characters , if wanted make sure didn't +1 character : or etc, it'd bunch of conditional arguments, making slower, looking cheap way character -> nextcharacter (determined characterset) doesn't use lot of resources, benchmarks webgrind preferred.

thanks :-)

use this:

# character set we're using iterate. $characterset  = 'abcdefg'; $chr_array = str_split($characterset);  foreach($chr_array $character){ //do whatever character, everytime provide next 1 when foreach loop continues } 

i hope helps