PHP从文本中提取7个字符十六进制

Question

I want to extract 7 hexadecimal char from text.

$text = 'Lorem ipsum dolor sit amet, 1AA69C9 consectetuer adipiscing elit. Aenean commodo ligula eget dolor. 2de7890';

preg_match_all("/^[0-9A-Fa-f]{7}$/",$text,$result);
print_r($result);

Thank you.

maybe similar to this but don't know why not working

Answer 1

/^[0-9A-Fa-f]{7}$/ looks for hexadecimal string at the start and end of the string.

Remove ^ and $ and make them word boundaries instead.

Use this:

/\b[0-9a-f]{7}\b/i