I need to replace some words or some sentences and convert it to underline. I'm using PHP and find one reference: PHP Regex, extract all custom tags from text
Somehow, the case only covers for single words but not sentences. How to make the regex also can catch everything enclosed by ## tag?
Let say my input will be such as:
"ll the Lorem Ipsum ##generators## on the Internet tend to repeat predefined chunks as necessary, making this the first true generator on the Internet. It uses a dictionary of over ##200 Latin words##, combined with a handful of model sentence structures, to generate Lorem Ipsum which looks reasonable. The generated Lorem Ipsum is therefore always ##free from repetition##, injected humour, or non-characteristic words etc."
Then the output will be:
"ll the Lorem Ipsum ____1____ on the Internet tend to repeat predefined chunks as necessary, making this the first true generator on the Internet. It uses a dictionary of over ____2____, combined with a handful of model sentence structures, to generate Lorem Ipsum which looks reasonable. The generated Lorem Ipsum is therefore always ____3____, injected humour, or non-characteristic words etc."
Can anyone help me on how to get the regex pattern?
I think the regex is:
/##[^#]+##/g
$text = 'll the Lorem Ipsum ##generators## on the Internet tend to repeat predefined chunks as necessary, making this the first true generator on the Internet. It uses a dictionary of over ##200 Latin words##, combined with a handful of model sentence structures, to generate Lorem Ipsum which looks reasonable. The generated Lorem Ipsum is therefore always ##free from repetition##, injected humour, or non-characteristic words etc.';
preg_match_all('/##[^#]+##/', $text, $matches, PREG_SET_ORDER);
for ($i = 0; $i < count($matches); $i++) {
$text = preg_replace("/".$matches[$i][0]."/", "___".strval($i+1)."___" , $text, 1);
}
Another idea using @shA.t's regex would be the use of preg_replace_callback with a function that increments a variable. So it can be done without loop, which might improve efficiency a bit.
$str = preg_replace_callback('/##[^#]+##/', function($m) use (&$i) {
return "____". ++$i ."____";
}, $str);