使用stringpos查找两边都有换行符的字符串不能正常工作

I have this code to search for a string that its both sides has newline but it's not working properly

$pospoint = strpos($pdftxt, "
{$stockcode}
");

It cant find the string if i used above code. Is there other way around this?

Use the constant PHP_EOL instead of " ".
PHP_EOL (End Of Line) will choose what method the string uses as new line (, ) so it's more dynamic than just guessing if it's or

$pospoint = strpos($pdftxt, PHP_EOL.$stockcode.PHP_EOL);