php讀取檔案內容至字串並加以處理的程式碼

/*
*读取文件内容至字符串中，同时去除换行、行首行尾空格。
*/
header("Content-type: text/html; charset=utf-8");
echo preg_replace('/((s)*(n)+(s)*)/i',',',file_get_contents('./file.php'));//End_php
//输出:
//aaaa,bbbb,cccc,dddd,eeee,ffff,gggg,hhhh,iiii,jjjj,kk kk,ll ll
?>

file.php内容： aaaa

cccc dddd eeee ffff gggg hhhh iiii jjjj kk kk ll ll

//file.php替换空格(x)、Tab(T)效果 aaaa

TTTT cccc ddddT xxxxxxxxxxxT eeeexxxxxxxxxx ffff gggg hhhhxxxxxxxx xxxxxxxxiiii xxxxxxxxjjjjxxxxxxx kkxxxkkTT xxxxllxxllTT Txxxxxxxxxx TTTxx