正则表达式返回php中的数字

Question

Hi i have a string and would like to search for the string that matches for example

[table id=345 /]

and would like it to return the digit 345. May I know what is the rule?

My rule is this:

preg_match("/\[table id=([^]*?) \/\]/s", $char, $match);

but not working.

How to get it return if there is more than one that match the pattern? at the moment it only return the first occurrence.

Answer 1

尝试这个：

preg_match("@\[table ([0-9]+) \/\]@s",$char,$match);

Answer 2

Here is your regex:

\[table id=\K\d+

This sample code prints all the matches (see output at the bottom of the online dem o):

$string = "[table id=345 /] [table id=123 /]
[table id=999 /] [table id=000 /]";
$regex = "~\[table id=\K\d+~";
$count = preg_match_all($regex,$string,$m);
print_r($m[0]);

Explain Regex

\[                       # '['
table id=                # 'table id='
\K                       # Keep what has been matched so far out of the returned match
\d+                      # digits (0-9) (1 or more times (matching
                         # the most amount possible))