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Gabriel Barros gabrielbarros

55 followers · 23 following
  • Rio de Janeiro, Brasil
  • 21:50 (UTC -03:00)
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@gabrielbarros
gabrielbarros / nextdns-purge-denylist
Last active June 7, 2025 17:37
NextDNS purge denylist
#!/usr/bin/env bash
API_KEY=xxx # Get it from https://my.nextdns.io/account
PROFILE_ID=xxxxxx # Get it from https://my.nextdns.io
url=https://api.nextdns.io/profiles/$PROFILE_ID/denylist
curl -s -H "X-Api-Key: $API_KEY" $url | jq -r '.data[] | select(.active == true) | .id' | while read -r domain; do
echo "Deleting $domain..."
curl -X DELETE -H "X-Api-Key: $API_KEY" $url/$domain
@gabrielbarros
gabrielbarros / nextdns-export-denylist
Last active April 23, 2025 21:08
NextDNS export denylist
#!/usr/bin/env bash
API_KEY=xxx # Get it from https://my.nextdns.io/account
PROFILE_ID=xxxxxx # Get it from https://my.nextdns.io
url=https://api.nextdns.io/profiles/$PROFILE_ID/denylist
curl -s -H "X-Api-Key: $API_KEY" $url | jq -r '.data[] | select(.active == true) | .id'
@gabrielbarros
gabrielbarros / nextdns-import-denylist
Last active April 23, 2025 21:09
NextDNS import denylist
#!/usr/bin/env bash
API_KEY=xxx # Get it from https://my.nextdns.io/account
PROFILE_ID=xxxxxx # Get it from https://my.nextdns.io
url=https://api.nextdns.io/profiles/$PROFILE_ID/denylist
tac denylist.txt | while read -r domain; do
echo "Adding $domain..."
curl -d $"{\"id\": \"$domain\"}" \
@gabrielbarros
gabrielbarros / replace-date-time-mktime-with-datetime-class.php
Created March 19, 2024 20:48
Replace date, gmdate, time, mktime, gmmktime with DateTime class
<?php
// date
echo "date\n";
echo date('Y-m-d H:i:s'), "\n";
$dt = new DateTime();
echo $dt->format('Y-m-d H:i:s'), "\n\n";
// gmdate (UTC date)
echo "gmdate\n";
@gabrielbarros
gabrielbarros / list-bytes-and-codepoints.php
Last active March 11, 2024 17:06
List bytes and codepoints in PHP
<?php
/*
* Heart emoji: ❤️
* UTF-8 bytes: E2 9D A4 EF B8 8F
* Code points: U+2764 U+FE0F
*/
header('Content-Type: text/plain');
@gabrielbarros
gabrielbarros / latin1-utf8.php
Created March 8, 2024 14:10
Convert from ISO-8859-1 to UTF-8 and vice-versa; test if it's valid UTF-8
<?php
// ISO-8859-1 → UTF-8
function latin1ToUtf8(string $str): string
{
return iconv('ISO-8859-1', 'UTF-8', $str);
}
// UTF-8 → ISO-8859-1
function utf8ToLatin1(string $str): string
@gabrielbarros
gabrielbarros / unicode-and-byte-notation.md
Last active December 14, 2024 18:40
Unicode and byte notation in various places and programming languages

Unicode and byte notation

Letter: A
Code points: U+0041
UTF-8 bytes: 41
UTF-16BE bytes: 00 41

Pound sign: £
Code points: U+00A3
@gabrielbarros
gabrielbarros / counting-utf8-bytes-code-points-and-grapheme-clusters.md
Last active December 14, 2024 19:16
Counting UTF-8 bytes, code points and grapheme clusters in various programming languages

Counting UTF-8 bytes, code points and grapheme clusters

Strings to test:

• Star emoji
⭐

- UTF-8 bytes: 3
- code points: 1
@gabrielbarros
gabrielbarros / reverse-string.php
Last active March 11, 2024 17:08
Reverse a string correctly in PHP considering bytes, code points and graphemes
<?php
// For ASCII only
$hello = 'Hello';
$revStrBytes1 = '';
for ($i = strlen($hello) - 1; $i >= 0; $i--) {
$revStrBytes1 .= $hello[$i];
}
// Alternative to the code above
@gabrielbarros
gabrielbarros / mail-servers.txt
Last active March 7, 2024 20:57
Mail servers (SMTP, IMAP and POP) for Gmail and Microsoft (Hotmail, Outlook)
Gmail
IMAP: imap.gmail.com:993 (SSL/TLS)
POP: pop.gmail.com:995 (SSL/TLS)
SMTP: smtp.gmail.com:587 (STARTTLS)
Microsoft (Hotmail, Outlook)
IMAP: outlook.office365.com:993 (SSL/TLS)
POP: outlook.office365.com:995 (SSL/TLS)
SMTP: smtp-mail.outlook.com:587 (STARTTLS)