从左侧和右侧修剪字符串

Question

如何从左侧和右侧修剪字符串中的5个字符。例如

4k2l3k4jc9l3kancie9 

应该怎样进行修整，并保持有：

4k2l3  k4jc9l3ka  ncie9 
^  ^  ^
remove  keep  remove 

Answer 1

$string = substr($string, 5, -5); 

Answer 2

$string = substr($string, 5, -5);//from left 
$string = substr($string, 0, 5);//from right