通过使用preg_match php正则表达式

Question

I have a variable $play which is made up of characters and numbers. For example:

$play = "blah05"

how do i use preg_match() to only get 05? is my $regexp correct?

$regexp = "/^[^0-9]/";
if (preg_match($regexp, $play, $matches)) {
   echo "matches[0]";
}

Answer 1

if you want to get numbers from the end, regexp should be this:

$regexp = '/(\\d+)$/';

if you want to get numbers from anywhere in the string:

$regexp = '/(\\d+)/';

and just do var_dump($matches); to see the results and choose which option is best for you.

if (preg_match($regexp, $play, $matches)) {
   var_dump($matches);
}

Answer 2

Try:

$regexp = "/([0-9]+)$/";
if (preg_match($regexp, $play, $matches)) {
    echo $matches[1];
}

This captures the ones which have the number at the end of the string remove the $ if you want to capture the ones which have the number anywhere in the string.

Answer 3

$regexp = "/[0-9]+/";
if (preg_match($regexp, $play, $matches)) {
   echo $matches[0];
}

[0-9] are the numbers. And with + you match at least one number (as much as possible).