matching word into string? is this correct variable insertion?

[bilis_money]

hi

i'm trying to match a word inside a string.
and here are the codes,
[code]
<?php
$title_old = "The payment system is currently unavailable while
we perform a system upgrade. Bringing these features back is
our top priority, and we expect to have them restored shortly.";

$title_new = "online";

//compare and search new_topic with old_topic using REGEX
if(preg_match("/\b$topic_new\b/i", $title_old)) {
echo "Yeah, i saw it!<br>";
} else {
echo "I can't see it!";
}
?>
[/code]

what i'm trying to do here is to just match the word 'online' witht the string
content of $title_old.
now i'm not sure of inserting those variables inside preg_match, can you
guys check if if i'm inserting $title_new and $title_old inside preg_match() correctly?

Thank you very much in advance.

[corbin]

$title_old = "The payment system is currently unavailable while
we perform a system upgrade. Bringing these features back is
our top priority, and we expect to have them restored shortly.";

I dont see online in there....

[corbin]

http://us2.php.net/preg_match

[zq29]

If you're only doing simple searches like that, it would be more efficient to use strpos().

[code]<?php
$title_old = "The payment system is currently unavailable while
we perform a system upgrade. Bringing these features back is
our top priority, and we expect to have them restored shortly.";

$title_new = "online";

if(strpos($title_old,$title_new) !== false) {
    echo "Yeah, i saw it!";
} else {
    echo "I can't see it!";
}
?>[/code]

[bilis_money]

thanks SA but i need it in REGEX,
I think REGEX is the best when it comes to this issue.

I'm trying to learn and absorb REGEX, because i believe it is complete and robust when it comes to this matter.


Hey corbin i'm studying REGEX for months now i don't think you understood my question.

If you tried to execute that codes you'll see what i mean.
i suggest you read it carefully and understand it first before you make your comments, but anyway thank you also.

ok, what i mean with that code is it is not suppose to display the 'I saw it!' echo because 'online' word is not inside the string.

So i guess there is wrong with my preg_match()

[effigy]

Use [tt]$title_new[/tt] instead of [tt]$topic_new[/tt]. Learning regular expressions is important, but knowing when to use them carries just as much weight.

[bilis_money]

Ha!,ha!,ha..  :D Lol! my mistake....! very funny.....

Thanks effigy... i didn't notice that.

I inserted the wrong variable name...

THanks!