<?php
$txt="Неё, неё в этом дело. Но удержать такого запала, правда?";
var_dump(preg_match_all("~(?<![\p{L}\p{Nd}])не(?![\p{L}\p{Nd}])~iu", $txt, $out));
var_dump( $out );
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
int(0)
array(1) {
[0]=>
array(0) {
}
}
Output for 4.3.11, 5.0.0 - 5.0.4
Warning: preg_match_all(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 6 in /in/UFH8D on line 5
bool(false)
array(0) {
}
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 6 in /in/UFH8D on line 5
bool(false)
array(0) {
}