i have a following paragraph.
++ a
xxx
xxxx
++ b
yyy
yyyy
yyyyy
++ c
zz
zzz
i need to delete this line.
++ b
yyy
yyyy
yyyyy
What is the regular expression i want to use?
Something like:
preg_replace('%(^++ b.*?)(++ c)%', '$2', $yourfile);
but you'll have to do some test to see if it is correct.
Something like:
preg_replace('%(^++ b.*?)(++ c)%', '$2', $yourfile);
but you'll have to do some test to see if it is correct.
Thankyou for your reply. But in my above paragraph , "b" is the only known variable. a,c and others are unknown.(changable).
What is the best solution for this problem? Please help me.
Just remove the c from the pattern. As long as the line will start with ++ it will still work.
Just remove the c from the pattern. As long as the line will start with ++ it will still work.
Even if i remove c, preg_replace function replace the following text including ++.
++ b
yyy
yyyy
yyyyy
++
i only need to delete
++ b
yyy
yyyy
yyyyy
Any Solutions please?
My test show you should use this:
$result = preg_replace('/(^\+\+ b.*?)(^\+\+)/sm', '${2}', $subject);
My test show you should use this:
$result = preg_replace('/(^\+\+ b.*?)(^\+\+)/sm', '${2}', $subject);
thanks for your reply. what this syntax "${2}" tells ?
Basically, the first pattern matches two parts $1 and $2, which are replaced by the second ($2). If you want to learn more, I can recommend this website.
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