the fact of real shit

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;
}
}

 

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going to change ZF2.4.9 core

I decided to change ZF 2.4.9 core. I know its a wired decision. But I don’t have any choice, cause they didn’t provide any release for PHP 7x. But the change will noted in this site by adding post for future.

Today I’m changing –

class: Zend\Validator\EmailAddress
function: idnToAscii($email) and
function: idnToUtf8($email)

Previous (original) code –

protected function idnToAscii($email)
{
if (extension_loaded(‘intl’)) {
return (idn_to_ascii($email) ?: $email);
}
return $email;
}

protected function idnToUtf8($email)
{
if (extension_loaded(‘intl’)) {
return idn_to_utf8($email);
}
return $email;
}

New Code

protected function idnToAscii($email)
{
if (extension_loaded(‘intl’)) {
return (idn_to_ascii($email, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46) ?: $email);
}
return $email;
}

protected function idnToUtf8($email)
{
if (extension_loaded(‘intl’)) {
return idn_to_utf8($email, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46);
}
return $email;
}

I took this decision for –

https://bugs.php.net/bug.php?id=75609 and
https://wiki.php.net/rfc/deprecate-and-remove-intl_idna_variant_2003

 

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change mysql data directory ubuntu 17.xx

Follow https://www.digitalocean.com/community/tutorials/how-to-move-a-mysql-data-directory-to-a-new-location-on-ubuntu-16-04
NOTE: you can skip empty directory (/var/lib/mysql/mysql) creation script in ubuntu 17.xx version.

Then try to start mysql server. If fail then log messages are telling you that /usr/sbin/mysqld needs read (r) access to open /proc/14767/status, /sys/devices/system/node/ (trailing slash because it wants to read the directory), and /proc/14767/task/14767/mem. The file to edit is /etc/apparmor.d/usr.sbin.mysqld.

In my case I solved the problem by adding these lines somewhere in the middle (with two spaces in front of each):

/proc/*/status r,
/sys/devices/system/node/ r,
/sys/devices/system/node/** r,

Reload apparmor:

sudo apparmor_parser -r /etc/apparmor.d/usr.sbin.mysqld
sudo /etc/init.d/apparmor reload

After doing that, try starting MySQL, and if you get more errors, add those files too and try again.

In some case mysql may fail to start for assoc i/o error. So, you may need to disable this settings by adding following line into /etc/mysql/mysql.conf.d/mysqld.cnf

innodb_use_native_aio=0

Another note about file permission of data directory is, “mysql” user should have permission into every directory of that path. Like if new data directory is “/media/myusb01/mysql-data” then “mysql” user should read access of “/media” folder and “/media/myusb01” folder and read write access at new data directory.

Hope mysql will start now.

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network adapter at guest [ubuntu] while setup host only network at virtualbox

I’m trying to setup host only network at virtualbox by following http://christophermaier.name/2010/09/01/host-only-networking-with-virtualbox/

but facing to choice network adapter at guest [ubuntu]

To see a list of the adapters your virtual machine can access, use this:

ls /sys/class/net

This will show you the interface names. For example, with two network adapters set up, my Ubuntu guest looks like this.

eth1 eth2 lo

To see a list of active network with IP address assigned

ifconfig

So you can easily guess what network adapter should use for host only network.

Well in a brand new ubuntu machine the permanent network save is not work in the way described in that article. For this you need to install ifupdown or ifupdown2 package

apt install ifupdown2

After install execute following command

ifup eth1

Then reboot.

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JavaScript class encaptulation

My favorite JavaScript class structure –

(function(exports) {
	"use strict";
	var mySuperDupparClassOfSHKR=function(pValue){
	var myPrivateValue;
	this.setValue=function(pValue){
		myPrivateValue=pValue;
		return this;
	};
	var __construct = function(that, pValue) {
		return that.setValue(pValue);
		}(this, pValue);
	};
	exports.SuperDupparClass = {
		create : function(pValue) {
			if(typeof pValue==='undefined') throw 'please provide a value, unable to continue...';
			return new mySuperDupparClassOfSHKR(pValue);
		},
	};
})(this);

Usage as follows –

var myObj;
jQuery(document).ready(function($) {
	try{
		myObj=SuperDupparClass.create('any value');
	}catch(e){
		alert('ERR: '+e);
	}
});

 

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Install PHP-Redis on PHP5.6 Centos 7

Assume that PHP 5.6 installed and working properly.

Now execute following command

sudo yum install php56w-devel
sudo yum install git-core
git clone git://github.com/nicolasff/phpredis.git
cd phpredis/
sudo phpize
sudo ./configure
sudo make
sudo make install
sudo echo "extension=redis.so">/etc/php.d/redis.ini
sudo apachectl restart

Its pretty simple!

Posted in linux, php, redis

PHP Archive (.phar) Attaching with ZF2

PHP archive aka phar is a stream wrapper which can serve any packaged PHP library efficiently.

To create a phar document for a library (not for web output or for cli executable) is simple as pie like –

$phar = new \Phar('target-location-where-to-save.phar', 
 FilesystemIterator::CURRENT_AS_FILEINFO |
 FilesystemIterator::KEY_AS_FILENAME, 'optionalPharAliasName');
$phar->buildFromDirectory('source/lib/path');

After creating phar document, file can use to attach ZF2 standard autoloader as follows –

Zend\Loader\AutoloaderFactory::factory(array(
 'Zend\Loader\StandardAutoloader' => array(
   'autoregister_zf' => true,
   'namespaces' => array(
          'YourProjectNamespace'=>'phar:///absolute/path/of/project/phar/file.phar',
        ),
     ),
   ));

This works as simple folder of your file system. Easily distributable, packaged.

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PHP Debug efficiently with debug_backtrace

Hello today I write a small function for debug your PHP code. Its simple but powerful –

$bkTrace=function ($stack) {
 $output = '';
 
 $stackLen = count($stack);
 for ($i = 1; $i < $stackLen; $i++) {
 $entry = $stack[$i];
 
 $func = (array_key_exists('class', $entry)?$entry['class'].'\\':'').$entry['function'] . '(';
 $argsLen = count($entry['args']);
 for ($j = 0; $j < $argsLen; $j++) {
 $my_entry = $entry['args'][$j];
 if (is_string($my_entry)) {
 $func .= $my_entry;
 }
 if ($j < $argsLen - 1) $func .= ', ';
 }
 $func .= ')';
 
 $entry_file = 'NO_FILE';
 if (array_key_exists('file', $entry)) {
 $entry_file = $entry['file'];
 }
 $entry_line = 'NO_LINE';
 if (array_key_exists('line', $entry)) {
 $entry_line = $entry['line'];
 }
 $output .= $entry_file . ':' . $entry_line . ' - ' . $func . PHP_EOL;
 }
 return $output;
 };
 echo '<pre>'.$bkTrace(debug_backtrace()); exit();

 

Also for response with warning you can use above method like below –

trigger_error(‘warning @’.$bkTrace(debug_backtrace(DEBUG_BACKTRACE_PROVIDE_OBJECT, 2)), E_USER_WARNING);

 

nJoy debugging…


			
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