Regex Extracting After the Match - php

Question

preg_match('/\$(\d+\.\d+)/',$message,$keywords);
dd($keywords);
Hi , have got a few questions
1) Is it possible to detect/extract the text after the regular expression? eg I'm trying to detect $1.20 possible to detect the text after it eg per hour , /hr , per hr, / hour.
1.1) Maybe like Extract 20 characters after the match
1.2) Possible to know the position of the match if i cant extract?
$100000/hour test test test
Extract test test tst

Answer 1

1) Put everything you want to extract in the regex, like this:
preg_match('#\$(\d+\.\d+)(\s+per hour|\s*/hr|\s+per hr|\s*/hour)?#',$message,$keywords);
You'll get the amount in $keywords[1] and the other piece of text in $keywords[2];
1.1) Use /\$(\d+\.\d+)(.{,20})/ to get at most 20 characters in the second match (if you remove the comma it will match only if after the amount there are at least 20 characters).
1.2) Use the $flags parameter of preg_match(): preg_match('/\$(\d+\.\d+)/',$message,$keywords,PREG_OFFSET_CAPTURE);. Check print_r($keywords) to see how the matched values and their offsets are returned
You probably need to find all the appearances. In this case use preg_match_all().

Answer 2

Try this:
$re = '~\$(\d+\.?\d+)/?(\w+)?~m';
$str = "$100000/hour\n$100.2000/min";
preg_match_all($re, $str, $matches);
var_dump($matches);
Demo on regex101
Output
array (size=3)
0 =>
array (size=2)
0 => string '$100000/hour' (length=12)
1 => string '$100.2000/min' (length=13)
1 =>
array (size=2)
0 => string '100000' (length=6)
1 => string '100.2000' (length=8)
2 =>
array (size=2)
0 => string 'hour' (length=4)
1 => string 'min' (length=3)