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Podman Tutorials

---

• https://podman.io/docs/installation

• Getting help

  • podman --help
  • podman <subcommand> --help
  • man podman
  • man podman-<subcommand>

• Searching, pulling & listing images

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# Make sure you have already installed apache and mysql;

# install rails
# https://help.ubuntu.com/lts/serverguide/ruby-on-rails.html
sudo apt install rails

# install comman dependencies
sudo apt-get install build-essential patch ruby-dev zlib1g-dev liblzma-dev make libmysqlclient-dev imagemagick \
libmagickcore-dev libmagickwand-dev

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New Stuff in PHP 7.0

1. Scalar type definitions: they come in two flavours: coercive (default) and strict. The following types for parameters can now be enforced (either coercively or strictly): strings (string), integers (int), floating-point numbers (float), and booleans (bool). They augment the other types introduced in PHP 5: class names, interfaces, array and callable.
   • https://blog.programster.org/php-strict-types
   • Typed pass-by-reference Parameters gotcha: Declared types of reference parameters are checked on function entry, but not when the function returns, so after the function had returned, the argument's type may have changed. For example:

   <?php
   function array_baz(array &$param)
   {

$param = 1;

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• https://insight.symfony.com/
• https://github.com/Roave/Dont
• https://github.com/Roave/you-are-using-it-wrong
• https://github.com/vimeo/psalm
• https://github.com/hirak/prestissimo
• https://github.com/rectorphp/rector
• https://github.com/thephpleague/pipeline
• https://github.com/lstrojny/functional-php
• https://github.com/ziadoz/awesome-php/blob/master/README.md#testing (Testing Tools: PHPUnit preferred)
• https://github.com/ziadoz/awesome-php/blob/master/README.md#continuous-integration (CI Tools: Travis preferred)

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<?php

    function rmdirRecursive(string $dir) {
        
        $iter = new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS);
        $it = new RecursiveIteratorIterator($iter, RecursiveIteratorIterator::CHILD_FIRST);
        
        foreach($it as $file) {
            
            if ($file->isDir()) {

rotexdegba

#!/bin/bash
#Removes old revisions of snaps
#CLOSE ALL SNAPS BEFORE RUNNING THIS
set -eu
LANG=en_US.UTF-8 snap list --all | awk '/disabled/{print $1, $3}' |
 while read snapname revision; do
     snap remove "$snapname" --revision="$revision"
 done
 

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<?php
	//This isset optimization is not suitable for arrays that contains null values.
	/*
		$a = array('a' => null);
		isset($a['a']); // Will be FALSE
		array_key_exists('a', $a); // Will be TRUE	
	*/
	
	$total = 10000;
	$paragraph = 'this is a sentence. Crud! $$$$!';

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// Tested with jQuery v3.3.1
$( document ).ready(function() {

    var doVisualUpdates = true;

    document.addEventListener('visibilitychange', function(){
        doVisualUpdates = !document.hidden;
    });

    // code below changes the background every 10 seconds for the div with id back-overlay-slider

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• Make sure xdebug is enabled in your php installation
• The following lines worked for me in my php.ini with PHP 7.2 on Windows 10

[xdebug]
zend_extension ="php_xdebug-2.6.1-7.2-vc15-x86_64.dll"
;xdebug.remote_enable=1
;xdebug.remote_handler=dbgp
;xdebug.remote_mode=req
;xdebug.remote_host=127.0.0.1
;xdebug.remote_port=9000

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See https://cheatsheetseries.owasp.org/, it's more comprehensive and up to date

PHP Security checklist

Basic

• Strong passwords are used.
• Passwords stored safely.
• register_globals is disabled.