<?php　　/*　　 *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