从文件读取的preg_match_all返回空数组

Question

I'm trying to read a file and filter its content. The result I'm expecting is this: https://regex101.com/r/uMTrtd/3 but I don't know why I'm not getting it. I've tried changing the PCRE limits with no result and I don't know what else to do.

If I run the preg with the actual string instead of reading the file it works, but the var_dump($file) returns a string.

<?php

$file = file_get_contents('myfile.txt');
var_dump($file);
$text = preg_replace('/(cve: .+? Pág\. [0-9]{1,2} )/u','', $file);

$re = '/(La señora|El señor) (.+?):(.+?\. (?=(La señora|El señor) (.+?):|Eran las .+?\.))/u';
preg_match_all($re, $text, $matches, PREG_SET_ORDER, 0);
var_dump($matches);

?>

You can check the content of the file here https://regex101.com/r/uMTrtd/3

Answer 1

try this:

$text = preg_replace('/(cve: .+? Pág\. [0-9]{1,2} )/us','', $file);


$re = '/(La señora|El señor) (.+?):(.+?\. (?=(La señora|El señor) (.+?):|Eran las .+?\.))/us';

"s" makes it search also over newlines