php 字符串分割几种方式
$str = str_replace("\\","/",__FILE__);
var_dump($str);
var_dump(split("/",$str));
var_dump(preg_split("/\//",$str));
var_dump(explode("/",$str));
var_dump(chunk_split($str,10));
var_dump(wordwrap(str_replace("\\"," ",__FILE__),10,"\r\n")); //wordwrap 是按照词语分割，句子要有空格
var_dump(str_split($str,10));
var_dump(implode("\r\n",str_split($str,10)));
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