PHP substr - 从字符串中提取数字

I need to extract the highlighted numbers from each line in a CSV file.

Currently I am looping though the lines & splitting the line on the / character as this only appears once in each row, but how do I remove everything around these numbers so I am left with:

9/10

10/11

11/12

...

If you want to only get the numbers, you could do a preg_match

$re = '/(\d+\/\d+)/s';
$str = 'dfsadsfadsfads~~9/10~~lfkjdskfds';

preg_match($re, $str, $matches);

but if you are able to get the entire doc as a single string, you could do a preg_match_all

$re = '/(\d+\/\d+)/s';
$str = 'dfsadsfadsfads~~9/10~~lfkjdskfds
dfsadsfadsfads~~9/10~~lfkjdskfds
';

preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);

then loop on the $matches