问题
I know this is simple, and I've done it before, but I've forgotten how to do it.
How might I, in php, subtract the first letter of a string?
For example:
FOOBAR would become OOBAR
I think its something like $string[-1];
回答1:
substr($string, 1)
http://php.net/manual/en/function.substr.php
回答2:
substr ( $string , 1 ,strlen($string) )
回答3:
If you are echoing the string out, then use:
$string[0] = '';
It's over an order of magnitude faster than:
substr($string, 1);
However, for anything else (eg accessing a database) it can cause problems and should be avoided.
来源：https://stackoverflow.com/questions/3592000/php-subtract-first-character-of-string