regex - Delete text form textfile with php -

i try delete texte in text file.

the texte file :

#message :0 * ^(to|cc).*fd.* |/usr/bin/vacation fd #monfiltreperso :0 * ^from.*martial@gironde.com maildir/.repertorymoi #fin #monfiltreperso2 :0 * ^subject:.*monsujet2 maildir/.repertorymoi2 #fin #monfiltreperso3 :0 * ^from.*martial2@gironde.com maildir/.repertorymoi2 #fin 

i try delete line between #monfiltre... , #monfiltre...

i have :

$pattern = '~'.'#filtre'.$nom.'\s*\n^#monfiltre~'; $filecontent = preg_replace($pattern, '', $filecontent); 

so can delete line :

#monfiltreperso :0 * ^from.*martial@gironde.com maildir/.repertorymoi 

but there #fin not deleted.

and have :

 #message :0 * ^(to|cc).*fd.* |/usr/bin/vacation fd #fin  (need deleted) :0 * ^subject:.*monsujet2 maildir/.repertorymoi2 #fin 

i need change rules :

$pattern = '~'.'#filtre'.$nom.'\s*\n^#monfiltre~'; 

but didn't find how.

if want remove portion between #monfiltre* until #fin, can use expression:

echo preg_replace('/^#monfiltreperso$.+?^#fin$[\r\n]*/ms', '', $str); 

it uses multiline mode /m can match against ^ (start of line) , $ (end of line). match across multiple lines, need dot-match-all mode /s; otherwise match until end of each line.

an optional set of newline characters matched prevent empty lines appearing in end result.

expression visualization

you can make dynamic if want:

$filter = preg_quote('perso3', '/'); echo preg_replace('/^#monfiltre' . $filter . '$.+?^#fin$[\r\n]*/ms', '', $str);