dodo512

$str = "Первая строка.\r\nВторая строка.\r\n\r\nЧетвертая строка.";
$str = preg_replace('#^([^\r\n]*)(\r?\n|\z)#m', '<p>$1</p>$2', $str);
echo $str;

https://rextester.com/KLNJ82386

{{.*?}}

const s =  "Это какой-то тексст {{param1}} дорогие пупсики {{param2}} и нужно из него {{param3}} выдернуть параметры"
console.log(s.match(/{{.*?}}/g))

https://regex101.com/r/eOj0fJ/1

/\d+(?=\s)(?=\s10usd)/

/\d+(?=\s10usd)/

xmlmiddle(\d{19})

xmlmiddle\d{19}(?s).*?xmlmiddle(\d{19})

xmlmiddle\d{19}(?s).*?xmlmiddle\d{19}.*?xmlmiddle(\d{19})

Или

\d{19}(?<=xmlmiddle\d{19})

\d{19}(?<=(?s)xmlmiddle\d{19}.{40,200}?xmlmiddle\d{19})

\d{19}(?<=(?s)xmlmiddle\d{19}.{40,200}?xmlmiddle\d{19}.{40,200}?xmlmiddle\d{19})

Find: ^(?:"\S+" ){2}
Replace: $0"dobavil11" //
https://regex101.com/r/imtQht/1

Find: (\d ){3}
Replace: $0\n
https://regex101.com/r/twGhiL/1

const s = "say \"hello world\""
const r = s.match(/"[^"]*"|[^\s"]\S*/g).map(m => m.replace(/^"|"$/g, ''))
console.log(r)

import re
s = "say \"hello world\""
r = []
for m in re.finditer('"([^"]*)"|[^\s"]\S*', s):
    if m.group(1) is None:
        r.append(m.group(0))
    else:
        r.append(m.group(1))

print(r)

.replace(/^ +|[^A-Z ]/g, '').replace(/ +(\w*).*/, ' $1')

.replace(/.*?([A-Z]+) +([A-Z]+).*/, '$1 $2')

UPD

.replace(/^ +|[^A-Z ]/g, '').replace(/ +(\w*).*/, ' $1')

$line = "text <p>text \n\n   \n text   \n text </p> text  \n\n \n text\n";
$line = preg_replace('#(?:^|</p>).*?(?:\z|<p>)(*SKIP)(*F)|\n#is', '<br />', $line);
echo $line;

В папке /core/components/calc/ создать файл .htaccess

# line below if for Apache 2.4
<ifModule mod_authz_core.c>
    Require all granted
</ifModule>

# line below if for Apache 2.2
<ifModule !mod_authz_core.c>
    allow from all
</ifModule>

Find: (?s).*?(\z|\d+\.\d+\.\d+\.\d+)
Replace: $1\n
https://regex101.com/r/f4tDrt/1

Убрать флаг QSA.

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?module=$1 [L]

Если нужно оставить возможность передавать другие параметры.

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?%{QUERY_STRING}&module=$1 [L]

<Location />
    AuthType GSSAPI
    AuthName "GSSAPI Single Sign On Login"
    GssapiCredStore keytab:/etc/httpd/key.keytab
    Require valid-user
    
    Require ip 192.168.10.20
</Location>

\b(?!всемирный)\w*мир\w*
https://regex101.com/r/aDugHg/1

RedirectMatch 301 ^/(category)/[^/]+/[^/]+$ /$1

Или
RewriteRule ^(category)/[^/]+/[^/]+$ /$1 [R=301,L]

RewriteCond %{THE_REQUEST} "^[^ ]* .*?\.php[? ].*$"
RewriteRule .* - [L,R=404]

Поменять на:

RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteRule \.php - [L,R=404]