I am looping trough a txt file which contains lines for example:
asdasdasd
lorem ipsum
lorem 12345-1
more lorem ipsum bacon
From this I need to know when the line founds text 12345-1
Lorem in the beging is inrelative.
Can I use stripos like
if (stripos('/^[1-9]{0,5}$-1/', $line) !== false)
I dont know the right regex. Of course the 12345 can be what ever, but its always 5 digits and ends with -1
To find a 5-digit chunk followed with -1, you may use
/\b[0-9]{5}-1\b/
Or, if word boundaries (\b) is too restrictive, use lookarounds:
/(?<!\d)\d{5}-1(?!\d)/
See the regex demo
Use it with preg_match:
if (preg_match('/\b[0-9]{5}-1\b/', $line))
{
echo "Found!";
}
Pattern details:
\b - a leading word boundary (or (?<!\d) - a negative lookbehind making the regex fail if there is a digit before the current location)[0-9]{5} - 5 digits-1 - a literal char sequence -1\b - a trailing word boundary (or (?!\d) - a negative lookahead making the regex fail if there is a digit right after the current location)