这段php代码定义了两个函数 str_prefix和str_suffix，分别用来给字符串前后添加指定数量的符号
| 1 2 3 4 5 6 7 8 | function str_prefix($str, $n=1, $char=" "){ for ($x=0;$x<$n;$x++){$str = $char.$str;} return $str; } function str_suffix($str, $n=1, $char=" "){ for ($x=0;$x<$n;$x++){$str = $str.$char;} return $str; } |
用法举例：
| 1 2 | str_prefix('test',3,'-')=>returns'---test' str_suffix('test',3,'-')=> returns 'test---' |
