Author: shkhan

Code, Explained
by shkhan
Posted on

Execute React JS in ntfs partition

I do development in mounted hard drive which is different than OS partition, also I like to use that mounted drive within different OS like windows and linux simultaneously. Which allow me portability of my code backup in different system.

Challenge is, I have to use such file system for that mounted drive which can accessible in most of the OS like windows, linux or iOS. And in this case NTFS is the best file system which is really portable. Problem for this FS is, it can’t support executable bit of linux which lead to raise many problem in React development. Like if you put any React project into that mounted drive, you can’t execute that code.

To solve this problem I take Docker as a solution. Simply, I create docker image of React project and execute that image. Here is the simple Dockerfile for React project –

FROM node:18
WORKDIR /app
COPY package.json ./
RUN npm install
RUN npm install -g npm@9.7.2
COPY . ./
EXPOSE 3000
CMD ["npm", "start"]

You just need to build this docker image and need to run. You can see docker log for any output for your React project.

Posted in ubuntu, windowsTagged , , , ,
by shkhan
Posted on

Changing ZF2 core 2.4.13 \Zend\Stdlib\Hydrator\AbstractHydrator::hasStrategy

class: Zend\Stdlib\Hydrator\AbstractHydrator
function: hasStrategy
php version: 7.4

public function hasStrategy($name)
{
if(is_array($this->strategies))
return array_key_exists($name, $this->strategies)
|| array_key_exists(‘*’, $this->strategies);
if(is_object($this->strategies)) return property_exists($this->strategies, $name);
return false;
}

new change / new code

Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in /media/shkr-home-wifi/works/workspace/vendor/ZF2/library/ Zend\Stdlib\Hydrator\AbstractHydrator on line 87

reason of change

public function hasStrategy($name)
{
return array_key_exists($name, $this->strategies)
|| array_key_exists(‘*’, $this->strategies);
}

previous code
Posted in php, zf2Tagged , , , , ,
by shkhan
Posted on

Changing ZF2 Core 2.4.13 /Zend/I18n/Translator/Loader/Gettext::load

class: Zend\I18n/Translator/Loader/Gettext
function: load
php version: 7.4

Last portion change …….

if ($textDomain->offsetExists(”)) {
$rawHeaders = explode(“\n”, trim($textDomain->offsetGet(”)));
foreach ($rawHeaders as $rawHeader) {
list($header, $content) = explode(‘:’, $rawHeader, 2);
if (trim(strtolower($header)) === ‘plural-forms’) {
$textDomain->setPluralRule(PluralRule::fromString($content));
}
}
$textDomain->offsetUnset(”);
}

………….. end of change ………………..

Reason to change: Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in …/Zend/I18n/Translator/Loader/Gettext.php on line 142

///////// previous code ///////////////////

if (array_key_exists(”, $textDomain)) {
$rawHeaders = explode(“\n”, trim($textDomain[”]));
foreach ($rawHeaders as $rawHeader) {
list($header, $content) = explode(‘:’, $rawHeader, 2);
if (trim(strtolower($header)) === ‘plural-forms’) {
$textDomain->setPluralRule(PluralRule::fromString($content));
}
}
unset($textDomain[”]);
}

Posted in php, zf2Tagged , , , ,
by shkhan
Posted on

Copy large amount of file to remote server using nohup tar and ssh

This command will copy large amount of file to remote server by compressing and decompressing on the fly. It saves time and bandwidth. It will execute in background, so you can detach current login session.

nohup sh -c “tar -c /any/directory/at/source/server/ | gzip -2 | ssh server-alias ‘cat | tar xz -C /target/directory/of/target/server/'” > /dev/null 2>&1 &

here nohup output sent to /dev/null that means i don’t want any nohup output. you can adjust its behavior.

I use the command for millions of file that occupied more than 500 GB.

Posted in linuxTagged , , ,
by shkhan
Posted on

add new hard disk into ubuntu more than 2TB size

lsblk

will list available device

parted /dev/sdd

considered device “sdd” from lsblk output

(parted) mklabel gpt
(parted) mkpart primary ext3 0 100%
(parted) print
(parted) quit

mkfs.ext3 /dev/sdd1

this command will format this hard disk into ext3 file system as we instruct by parted command

mkdir /home/data

mounting point directory creating

mount -t ext3 /dev/sdd1 /home/data

mounting formatted hard disk into target directory

blkid

try to find ID of new hard disk to write into fstab so that after restart our hard disk will mount automatically

sample output of blkid

/dev/sdd1: UUID="20e4b16b-4d4c-4053-b6f4-a2c103f2db2f" TYPE="ext3" PARTLABEL="primary" PARTUUID="33658d68-726f-4398-992f-2aaafebe17ff"

vi /etc/fstab

give an entry for our new hard disk at the end of this file

example entry

UUID=20e4b16b-4d4c-4053-b6f4-a2c103f2db2f /home/data ext3 nofail 0 0
Posted in linux, ubuntuTagged , , , ,
by shkhan
Posted on

recursive change group and file mode in linux and detach active login session

change group

nohup sh -c “find /any/path/that/need/to/change/* -group mygroup -exec chgrp www-data {} \;” > /dev/null 2>&1 &

traditional way

nohup sh -c “chgrp -R www-data /any/path/that/need/to/change” > /dev/null 2>&1 &

change mode

nohup sh -c “find /any/path/that/need/to/change/* -perm u=rw,g=r,o=r -execdir chmod g+w {} \;” > /dev/null 2>&1 &

traditional way

nohup sh -c “chmod -R g+w /any/path/that/need/to/change” > /dev/null 2>&1 &

Posted in linux, ubuntuTagged , , , , , ,
by shkhan
Posted on

Changing ZF2 Core 2.4.13 Zend\View\Helper\HeadLink::createDataStylesheet

class: Zend\View\Helper\HeadLink
function: createDataStylesheet
php version: 7.3

public function createDataStylesheet(array $args)
{
$rel = ‘stylesheet’;
$type = ‘text/css’;
$media = ‘screen’;
$conditionalStylesheet = false;
$href = array_shift($args);
if ($this->isDuplicateStylesheet($href)) { return false; } if (0 < count($args)) { $media = array_shift($args); if (is_array($media)) { $media = implode(',', $media); } else { $media = (string) $media; } } if (0 < count($args)) { $conditionalStylesheet = array_shift($args); if (!empty($conditionalStylesheet) && is_string($conditionalStylesheet)) { $conditionalStylesheet = (string) $conditionalStylesheet; } else { $conditionalStylesheet = null; } } $attributes = compact('rel', 'type', 'href', 'media', 'conditionalStylesheet'); if (0 < count($args) && is_array($args[0])) { $extras = array_shift($args); $attributes['extras'] = (array) $extras; } return $this->createData($attributes); }

new/modified/final/current code

public function createDataStylesheet(array $args)
{
$rel = ‘stylesheet’;
$type = ‘text/css’;
$media = ‘screen’;
$conditionalStylesheet = false;
$href = array_shift($args);
if ($this->isDuplicateStylesheet($href)) { return false; } if (0 < count($args)) { $media = array_shift($args); if (is_array($media)) { $media = implode(',', $media); } else { $media = (string) $media; } } if (0 < count($args)) { $conditionalStylesheet = array_shift($args); if (!empty($conditionalStylesheet) && is_string($conditionalStylesheet)) { $conditionalStylesheet = (string) $conditionalStylesheet; } else { $conditionalStylesheet = null; } } if (0 < count($args) && is_array($args[0])) { $extras = array_shift($args); $extras = (array) $extras; } $attributes = compact('rel', 'type', 'href', 'media', 'conditionalStylesheet', 'extras'); return $this->createData($attributes); }

previous/original/old code
Posted in php, zf2Tagged , , , ,
by shkhan
Posted on

Install php 7.2 ssh2 in ubuntu 16x

recently i need to install ssh2 connection through my php code to connect remote server by sftp for file transfer. i’m using php 7.2 and face a “sigment fault” issue for normal installation. i solved this issue by install required demon. hope it may help someone who face same issue.

first you need to install/upgrade some basic program

apt-get install gcc make autoconf libc-dev pkg-config

then install base library

apt-get install libssh2-1-dev

now install required php modules

apt-get install php7.2-dev php-pear

now install ssh by pecl (the most important part of installation)

— pecl channel-update pecl.php.net
pear config-show
— pear config-set php_ini /etc/php/7.2/apache2/php.ini
— pear config-set temp_dir /etc/php/temp/pear
pecl install ssh2-1.1.2

ignore commented line OR use if you understand by yourself

now you need to enable ssh2 extension into your php cli installation

echo “extension=ssh2.so” > /etc/php/7.2/mods-available/ssh2.ini
ln -s /etc/php/7.2/mods-available/ssh2.ini /etc/php/7.2/cli/conf.d/30-ssh2.ini

please check you php installation/configuration path. set priority on your own. i set here 30 without proper understanding 😀

now another important part is your PHP code. when we use ssh2 in fopen wraper, in other version of ssh2 connection we need to open a connection and we can use resource id. but with the above change you must use user, password, port i.e. full access information every time we need to connect to server. here is my sample code –

$fh = @fopen(‘ssh2.sftp://’ . $this->user.’:’.$this->pass.’@’.$this->ip.’:’.(intval($this->port)>0?intval($this->port):22) . $pRemoteLocation, $pMode);

all other code like directory creation or any other command execution may be same as before.

Posted in php, ubuntuTagged , , , , , , ,
by shkhan
Posted on

changing zf2 core 2.4.13 Zend/Stdlib/ArrayObject.php

class : Zend\Stdlib\ArrayObject
function: unserialize($data)
php version: 7.3

previous (original) code

/**
* Unserialize an ArrayObject
*
* @param string $data
* @return void
*/
public function unserialize($data)
{
$ar = unserialize($data);
$this->protectedProperties = array_keys(get_object_vars($this));

$this->setFlags($ar[‘flag’]);
$this->exchangeArray($ar[‘storage’]);
$this->setIteratorClass($ar[‘iteratorClass’]);

foreach ($ar as $k => $v) {
switch ($k) {
case ‘flag’:
$this->setFlags($v);
break;
case ‘storage’:
$this->exchangeArray($v);
break;
case ‘iteratorClass’:
$this->setIteratorClass($v);
break;
case ‘protectedProperties’:
continue;
default:
$this->__set($k, $v);
}
}
}

new code

public function unserialize($data)
{
$ar = unserialize($data);
$this->protectedProperties = array_keys(get_object_vars($this));

$this->setFlags($ar[‘flag’]);
$this->exchangeArray($ar[‘storage’]);
$this->setIteratorClass($ar[‘iteratorClass’]);

$need2continue=false;
foreach ($ar as $k => $v) {
$need2continue=false;
switch ($k) {
case ‘flag’:
$this->setFlags($v);
break;
case ‘storage’:
$this->exchangeArray($v);
break;
case ‘iteratorClass’:
$this->setIteratorClass($v);
break;
case ‘protectedProperties’:
/**
* in php 7.3 it shows
* Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /…location of zf2 ………../Zend/Stdlib/ArrayObject.php on line 426
*/
#continue;
$need2continue=true;
break;
default:
$this->__set($k, $v);
}
if(true==$need2continue) continue;
}
}

 

Posted in php, zf2Tagged , , , ,