Tom Zhu TomZhuPlanetart

RFC4716: SSH2 public or private key. Begins with -----BEGIN OPENSSH PRIVATE KEY-----
PKCS#8: PKCS8 public or private key. Use the -m PKCS8 option of ssh-keygen. Begins with -----BEGIN PUBLIC KEY-----
PKCS#1
DER: Binary format
PEM: PEM public key. This refers to PKCS#8 when it's used in openssl commands.

PKCS8/PKCS1 are specifically for RSA keys.

Let's encrypt something

echo hello world | openssl enc -aes-256-cbc -pass pass:hello -iter 10 -in - -out - | base64

The output looks like:

(\w*|\w*::\w*)\((?:\s*((?<=\()|(?<!\(),)\s*((?R)|\$\w+)\s*)*\)

This expression matches function calls like below:

Registry::initRegistry(registry( $a, $b, abc( $a, $b, $c), $d));

	FROM amazonlinux:2

	RUN yum install -y httpd vim
	RUN amazon-linux-extras enable php8.2 && yum clean metadata
	RUN yum install -y php-bcmath.x86_64 \
	php-cli.x86_64 \
	php-dba.x86_64 \
	php-dbg.x86_64 \
	php-devel.x86_64 \
	php-enchant.x86_64 \


	### https://linuxcommand.org/lc3_adv_tput.php

	# save the content of the screen
	tput smcup
	tput cup 0 0

	for ((i=0; i<10; i++)); do
	# set forground color
	tput setaf $i

	<?php
	/**
	* User: Tom.Zhu<tom.zhu@planetart.cn>
	* Date: 2022/10/7
	* Time: 23:34
	*/

	$base = new EventBase();

	$start = microtime(true);

	<?php
	/**
	* User: Tom.Zhu<tom.zhu@planetart.cn>
	* Date: 2022/9/28
	* Time: 22:13
	*/

	class FiberFactory
	{
	private static WeakMap $weakMap;