Replace all but the last one.

[Captain Paralytic]

To replace just the last full stop in some text with ".@" I can use

preg_replace('/\.$/','.@',$s);

But how so I reverse that to replace all full stops except for the
last one.

E.G.
"Hello I must be going.
And so it goes. On and on."
should become:
"Hello I must be going.@
And so it goes.@ On and on."

[Curtis]

Captain Paralytic wrote:

To replace just the last full stop in some text with ".@" I can use

preg_replace('/\.$/','.@',$s);

But how so I reverse that to replace all full stops except for the
last one.

E.G.
"Hello I must be going.
And so it goes. On and on."
should become:
"Hello I must be going.@
And so it goes.@ On and on."

Do you mean remove the last occurrence of ".@", or only remove ".@" if
it's at the end of the string?

Your regex replace doesn't work, so I changed it up. Here are a couple
examples:

Remove if .@ is at end of string:

<?php
$s = "Hello I must be going.\n" .
"And so it goes. On and on.';

$s = preg_replace('/\.(\s|$)/', '.@$1', $s);
$s = rtrim($s, '.@') . '.';
?>

Remove last occurrence of .@ in the string (might not be at end):

<?php
$s = "Hello I must be going.\n" .
"And so it goes. On and on.';

$s = preg_replace('/\.(\s|$)/', '.@$1', $s);
$s = substr_replace($s, '.', strrpos($s,'.@'), 2);
?>

HTH

--
Curtis (http://dyersweb.com)

[Curtis]

Curtis wrote:

Captain Paralytic wrote:

>To replace just the last full stop in some text with ".@" I can use

preg_replace('/\.$/','.@',$s);

But how so I reverse that to replace all full stops except for the
last one.

E.G.
"Hello I must be going.
And so it goes. On and on."
should become:
"Hello I must be going.@
And so it goes.@ On and on."

Do you mean remove the last occurrence of ".@", or only remove ".@" if
it's at the end of the string?

Your regex replace doesn't work, so I changed it up. Here are a couple
examples:

<snip>

Sorry, just a follow up. The reason the regex didn't work for me was
because I'm on win32, and the line terminators were CRLFs, which the
/m modifier won't recognize. Setting the text editor to UNIX format or
explicitly using LFs make it work properly.

Sorry, again.

--
Curtis

[Captain Paralytic]

On 29 Aug, 02:53, Curtis <[e-mail]:

Captain Paralytic wrote:

To replace just the last full stop in some text with ".@" I can use

preg_replace('/\.$/','.@',$s);

But how so I reverse that to replace all full stops except for the
last one.

E.G.
"Hello I must be going.
And so it goes. On and on."
should become:
"Hello I must be going.@
And so it goes.@ On and on."

Do you mean remove the last occurrence of ".@", or only remove ".@" if
it's at the end of the string?

No, I don't mean that at all.

I have:
Hello I must be going.
And so it goes. On and on.

If I run it through:
preg_replace('/\.$/','.@',$s);

I get:
Hello I must be going.
And so it goes. On and on.@

So that pattern replaces the last occurrence (and only if that last
occurrence is at the end of the string) of a full stop with .@

If instead I run it through:
preg_replace('/\./','.@',$s);

I get:
Hello I must be going.@
And so it goes.@ On and on.@

HOWEVER, what I want to get is:
Hello I must be going.@
And so it goes.@ On and on.

Is this any clearer?

[Curtis Dyer]

In article <66042273-66fd-41df-b9bb-3ef0ec275170
@k37g2000hsf.googlegroups.com>, pa**********@yahoo.com says...

On 29 Aug, 02:53, Curtis <[e-mail]:

Captain Paralytic wrote:

To replace just the last full stop in some text with ".@" I can use

preg_replace('/\.$/','.@',$s);

But how so I reverse that to replace all full stops except for the
last one.

E.G.
"Hello I must be going.
And so it goes. On and on."
should become:
"Hello I must be going.@
And so it goes.@ On and on."

Do you mean remove the last occurrence of ".@", or only remove ".@" if
it's at the end of the string?

No, I don't mean that at all.

I have:
Hello I must be going.
And so it goes. On and on.

If I run it through:
preg_replace('/\.$/','.@',$s);

I get:
Hello I must be going.
And so it goes. On and on.@

So that pattern replaces the last occurrence (and only if that last
occurrence is at the end of the string) of a full stop with .@

If instead I run it through:
preg_replace('/\./','.@',$s);

I get:
Hello I must be going.@
And so it goes.@ On and on.@

HOWEVER, what I want to get is:
Hello I must be going.@
And so it goes.@ On and on.

Is this any clearer?

Ok, then try my example in my first reply that uses rtrim, that should
do the trick.

--
Curtis

[Captain Paralytic]

On 30 Aug, 01:57, Curtis Dyer <[e-mail]:

In article <66042273-66fd-41df-b9bb-3ef0ec275170
@k37g2000hsf.googlegroups.com>, [e-mail] says...

On 29 Aug, 02:53, Curtis <[e-mail]:

Captain Paralytic wrote:
To replace just the last full stop in some text with ".@" I can use

preg_replace('/\.$/','.@',$s);

But how so I reverse that to replace all full stops except for the
last one.

E.G.
"Hello I must be going.
And so it goes. On and on."
should become:
"Hello I must be going.@
And so it goes.@ On and on."

Do you mean remove the last occurrence of ".@", or only remove ".@" if
it's at the end of the string?

No, I don't mean that at all.

I have:
Hello I must be going.
And so it goes. On and on.

If I run it through:
preg_replace('/\.$/','.@',$s);

I get:
Hello I must be going.
And so it goes. On and on.@

So that pattern replaces the last occurrence (and only if that last
occurrence is at the end of the string) of a full stop with .@

If instead I run it through:
preg_replace('/\./','.@',$s);

I get:
Hello I must be going.@
And so it goes.@ On and on.@

HOWEVER, what I want to get is:
Hello I must be going.@
And so it goes.@ On and on.

Is this any clearer?

Ok, then try my example in my first reply that uses rtrim, that should
do the trick.

--
Curtis- Hide quoted text -

- Show quoted text -

I was already doing something similar. It just seemed to me that there
ought to be a way to "reverse" the action of the pattern so as to do
it in one go.

[John Dunlop]

Captain Paralytic:

[...] replace all full stops except for the last one.

/\.(?=.*\..*$)/s

--
Jock

[Curtis]

John Dunlop wrote:

Captain Paralytic:

>[...] replace all full stops except for the last one.

/\.(?=.*\..*$)/s

--
Jock

Simpler yet, this will only replace periods followed by one or more
whitespace chars, but will not replace a period at the end of the string:

preg_replace('/\.(\s+)/', '.@$1', $str);

--
Curtis