| 'a' . 'b' | ['a' 'b'], strcat('a', 'b') |
| array('a','b') | ['a';'b'], strvcat('a','b') (two dimensional array), or {'a','b'} (cell array) |
| substr($str, 0, 3) | str(1:2), subtr(str, 0, 3) (MATLB String Utilities ) |
| rtrim($str) | deblank(str) |
| trim($str) | strtrim(str) |
| explode($delim,$str) (split) | strsplit(delim,str) (MATLB String Utilities) |
| implode($delim,$str) (join) | strjoin(delim,str) (MATLB String Utilities) |
| strpos($str,$needle) | strfind(str,needle), findstr(str,needle), findstr(needle,str) |
| preg($regexp,$str), ereg($regexp,$str) | regexp(str,regexp) |
| pregi($regexp,$str), eregi($regexp,$str) | regexpi(str,regexp) |
| preg_replace($pattern,$replace,$str), ereg_replace($pattern,$replace,$str) | regexprep(str,pattern,replace) |
| preg_grep($pattern,$array) | |
| strlen($str) | length(str) |
| str_replace($pattern,$replace,$str) | strrep(str,pattern,replace) |
| sprintf | sprintf |
| sscanf | sscanf |
| strtok($str,$token) | strtok(str,token) |
| strcmp($str1,$str2) | strcmp(str1,str2) |
| strncmp($str1,$str2,$len) | strncmp(str1,str2,len) |
| strcasecmp($str1,$str2) | strcmpi(str1,str2) |
| strtolower($str) | lower(str) |
| strtoupper($str) | upper(str) |
| ucfirst($str) | [upper(str(1)), str(2:end)] |
| lcfirst($str) | [lower(str(1)), str(2:end)] |
| ucwords($str) | |
| genvarname(str) |
| parse_url($str) (This is for URL, though) | [dir,file,ext]=fileparts(str) |
| http_build_query (This is for URL, though) | fullfile(dir,file) |
