Redis connection test script

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
<?php
require "../predis/autoload.php";  // Update with your location to predis
Predis\Autoloader::register();


try {
    $redis = new Predis\Client();
    // Uncomment the following lines and adjust them accordingly if you have a non-default redis configuration
/*
    $redis = new Predis\Client(array(
        "scheme" => "tcp",
        "host" => "127.0.0.1",
        "port" => 6379));
*/

    echo "Connected to Redis";
}
catch (Exception $e) {
    echo "Unable to connect to Redis";
    echo $e->getMessage();
}

$redis->set("var1", "The value for var1 is me");
echo $redis->get("var1");

// You can alos use exits() function to test if a variable exists or not
echo ($redis->exists("var2")) ? "true" : "false";
Posted in php, Web Development | Leave a comment

Learning Ontario G1 Test through IOS App

Several colleagues of mine produced an app for iPhones and iPad to help people study Ontario G1 driver license test.

This app can potentially boost your study in a very cost effective way at $1.99. Take a peak of the most common questions and answers during the exam.

Please see the detail link below for the “G1 Test Ontario Learner ONTARIO SAFETY LEAGUE (OSL) Driver’s Education” app by Radiant Design Studio
https://itunes.apple.com/ca/app/g1-ontario-learner/id538804363

Posted in Uncategorized | Leave a comment

SVN Tricks in Linux

To show colorized svn diff

1
sudo aptitude install colordiff

Then on your home directory there is a hidden file called .bashrc.
Edit it.

1
vim ~/.bashrc

Append the following code at the end of the file

1
2
3
4
svndiff()
{
  svn diff "${@}" | colordiff
}

Reload the .bashrc file:

1
 ~/.bashrc

Next to view the diff use svndiff instead of svn diff

Removing all .svn subfolders

1
rm -rf `find . -type d -name .svn`

SVN Revert All

1
svn st -q | awk '{print $2;}' | xargs svn revert
Posted in Linux, Operating System, Version Control | Leave a comment

Introduction to Logging and Tracing in PHP

If you still tracing variable in php using print_r() or var_dump() then you’ll see them directly in the screen or the web page that you’re working on. This is easy to see, but also prone to problems:

  1. What if visitors see your error trace? Surely you don’t want that.
  2. What if you have a function call that relies on no string has been printed yet, e.g.: header(), ini_set(), these functions will fail and depending on your settings most likely when they fail they don’t show any sign of error.

Best way to do code tracing in PHP is to write the following code into your file – one of the early-executed file, such as config/header file, where you don’t have any output yet:

1
2
3
ini_set('log_errors','On');
ini_set('error_log', '/var/wwwtmp/php.log');
error_reporting(E_ALL ^ (E_NOTICE | E_WARNING));

And at the part where you want to trace a certain variable

1
error_log(__FILE__.' ('.__LINE__.') '.__CLASS__.' :: '. __FUNCTION__ .' :: '. print_r($YOUR_VARIABLE_HERE,true));

By default apache2 and php will output their error in /var/log/apache2/error.log ,but after executing the ini_set above, the error log will be produced in /var/wwwtmp/php.log. And you need to make sure you that directory exists, if not use other directory that www-data has write access to. Why do we need to setup in a different location? Because the default file output doesn’t support showing new lines, you’ll see lot’s of \n. Thus make tracing hard to read.

Posted in php, Web Development | Leave a comment

Robocopy – Automate Your Windows Copy

I backup my files regularly using the windows scheduler. For example several folders from my windows preferences folder in drive C (C:\Users\dellxps\AppData\Roaming) to another drive, to D:\Users\Ronald\AppData\Roaming.

There is a built in smart copier in windows that is not known by many people called robocopy.
Take a look at the following scripts: backup.bat and restore.bat

backup.bat

1
2
3
4
5
6
7
8
@echo off
SET vSourceRootFolder=C:\Users\dellxps\AppData\Roaming
SET vDestinationRootFolder=D:\Users\Ronald\AppData\Roaming
echo "========================================"
echo "== Backup application preference files"
echo "========================================"
robocopy %vSourceRootFolder%\"FileZilla\" %vDestinationRootFolder%\"FileZilla\" /MIR /R:2 /W:0 /XJD /XJ /NP /LOG+:D:\sync\backup_d_drive.log
robocopy %vSourceRootFolder%\"Mozilla\" %vDestinationRootFolder%\"Mozilla\" /MIR /R:2 /W:0 /XJD /XJ /NP /LOG+:D:\sync\backup_d_drive.log

restore.bat

1
2
3
4
5
6
7
8
@echo off
SET vDestinationRootFolder=C:\Users\dellxps\AppData\Roaming
SET vSourceRootFolder=D:\Users\Ronald\AppData\Roaming
echo "========================================"
echo "== Backup application preference files"
echo "========================================"
robocopy %vSourceRootFolder%\"FileZilla\" %vDestinationRootFolder%\"FileZilla\" /MIR /R:2 /W:0 /XJD /XJ /NP /LOG+:D:\sync\backup_d_drive.log
robocopy %vSourceRootFolder%\"Mozilla\" %vDestinationRootFolder%\"Mozilla\" /MIR /R:2 /W:0 /XJD /XJ /NP /LOG+:D:\sync\backup_d_drive.log

And here is the documentation from robocopy /?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows                              
-------------------------------------------------------------------------------

  Started : Wed Sep 19 21:48:29 2012

              Usage :: ROBOCOPY source destination [file [file]...] [options]

             source :: Source Directory (drive:\path or \\server\share\path).
        destination :: Destination Dir  (drive:\path or \\server\share\path).
               file :: File(s) to copy  (names/wildcards: default is "*.*").

::

:: Copy options :
::
                 /S :: copy Subdirectories, but not empty ones.
                 /E :: copy subdirectories, including Empty ones.
             /LEV:n :: only copy the top n LEVels of the source directory tree.

                 /Z :: copy files in restartable mode.
                 /B :: copy files in Backup mode.
                /ZB :: use restartable mode; if access denied use Backup mode.
            /EFSRAW :: copy all encrypted files in EFS RAW mode.

  /COPY:copyflag[s] :: what to COPY for files (default is /COPY:DAT).
                       (copyflags : D=Data, A=Attributes, T=Timestamps).
                       (S=Security=NTFS ACLs, O=Owner info, U=aUditing info).

           /DCOPY:T :: COPY Directory Timestamps.

               /SEC :: copy files with SECurity (equivalent to /COPY:DATS).
           /COPYALL :: COPY ALL file info (equivalent to /COPY:DATSOU).
            /NOCOPY :: COPY NO file info (useful with /PURGE).

            /SECFIX :: FIX file SECurity on all files, even skipped files.
            /TIMFIX :: FIX file TIMes on all files, even skipped files.

             /PURGE :: delete dest files/dirs that no longer exist in source.
               /MIR :: MIRror a directory tree (equivalent to /E plus /PURGE).

               /MOV :: MOVe files (delete from source after copying).
              /MOVE :: MOVE files AND dirs (delete from source after copying).

     /A+:[RASHCNET] :: add the given Attributes to copied files.
     /A-:[RASHCNET] :: remove the given Attributes from copied files.

            /CREATE :: CREATE directory tree and zero-length files only.
               /FAT :: create destination files using 8.3 FAT file names only.
               /256 :: turn off very long path (> 256 characters) support.

             /MON:n :: MONitor source; run again when more than n changes seen.
             /MOT:m :: MOnitor source; run again in m minutes Time, if changed.

      /RH:hhmm-hhmm :: Run Hours - times when new copies may be started.
                /PF :: check run hours on a Per File (not per pass) basis.

             /IPG:n :: Inter-Packet Gap (ms), to free bandwidth on slow lines.

                /SL :: copy symbolic links versus the target.

            /MT[:n] :: Do multi-threaded copies with n threads (default 8).
                       n must be at least 1 and not greater than 128.
                       This option is incompatible with the /IPG and /EFSRAW options.
                       Redirect output using /LOG option for better performance.

::

:: File Selection Options :
::
                 /A :: copy only files with the Archive attribute set.
                 /M :: copy only files with the Archive attribute and reset it.
    /IA:[RASHCNETO] :: Include only files with any of the given Attributes set.
    /XA:[RASHCNETO] :: eXclude files with any of the given Attributes set.

 /XF file [file]... :: eXclude Files matching given names/paths/wildcards.
 /XD dirs [dirs]... :: eXclude Directories matching given names/paths.

                /XC :: eXclude Changed files.
                /XN :: eXclude Newer files.
                /XO :: eXclude Older files.
                /XX :: eXclude eXtra files and directories.
                /XL :: eXclude Lonely files and directories.
                /IS :: Include Same files.
                /IT :: Include Tweaked files.

             /MAX:n :: MAXimum file size - exclude files bigger than n bytes.
             /MIN:n :: MINimum file size - exclude files smaller than n bytes.

          /MAXAGE:n :: MAXimum file AGE - exclude files older than n days/date.
          /MINAGE:n :: MINimum file AGE - exclude files newer than n days/date.
          /MAXLAD:n :: MAXimum Last Access Date - exclude files unused since n.
          /MINLAD:n :: MINimum Last Access Date - exclude files used since n.
                       (If n < 1900 then n = n days, else n = YYYYMMDD date).

                /XJ :: eXclude Junction points. (normally included by default).

               /FFT :: assume FAT File Times (2-second granularity).
               /DST :: compensate for one-hour DST time differences.

               /XJD :: eXclude Junction points for Directories.
               /XJF :: eXclude Junction points for Files.

::

:: Retry Options :
::
               /R:n :: number of Retries on failed copies: default 1 million.
               /W:n :: Wait time between retries: default is 30 seconds.

               /REG :: Save /R:n and /W:n in the Registry as default settings.

               /TBD :: wait for sharenames To Be Defined (retry error 67).

::

:: Logging Options :
::
                 /L :: List only - don't copy, timestamp or delete any files.
                 /X :: report all eXtra files, not just those selected.
                 /V :: produce Verbose output, showing skipped files.
                /TS :: include source file Time Stamps in the output.
                /FP :: include Full Pathname of files in the output.
             /BYTES :: Print sizes as bytes.

                /NS :: No Size - don't log file sizes.
                /NC :: No Class - don't log file classes.
               /NFL :: No File List - don't log file names.
               /NDL :: No Directory List - don't log directory names.

                /NP :: No Progress - don't display percentage copied.
               /ETA :: show Estimated Time of Arrival of copied files.

          /LOG:file :: output status to LOG file (overwrite existing log).
         /LOG+:file :: output status to LOG file (append to existing log).

       /UNILOG:file :: output status to LOG file as UNICODE (overwrite existing log).
      /UNILOG+:file :: output status to LOG file as UNICODE (append to existing log).

               /TEE :: output to console window, as well as the log file.

               /NJH :: No Job Header.
               /NJS :: No Job Summary.

           /UNICODE :: output status as UNICODE.

::

:: Job Options :
::
       /JOB:jobname :: take parameters from the named JOB file.
      /SAVE:jobname :: SAVE parameters to the named job file
              /QUIT :: QUIT after processing command line (to view parameters).
              /NOSD :: NO Source Directory is specified.
              /NODD :: NO Destination Directory is specified.
                /IF :: Include the following Files.

Posted in DOS, Operating System | Leave a comment

Displaying Linux Distro Version and Showing 32Bit or 64Bit OS

Checking whether you have 32bit linux or 64bit linux. From the code below we can see that it is a 64 bit linux.

1
2
[user1@ubuntu 17:14:37 ~/dev]$ uname -mrs
Linux 3.2.0-30-generic x86_64

Checking which distro you’re using:

1
2
3
4
5
6
[user1@ubuntu 17:14:48 ~/dev]$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.1 LTS
Release:    12.04
Codename:   precise
Posted in Linux, Operating System | Leave a comment

Find and Replace File Content using Linux Command Line

1
find . -name "*.pgsql" -print | xargs sed -i 's/STRINGTOREPLACE/REPLACERSTRING/g'
Posted in Linux, Operating System | Leave a comment

How To List All Users or Groups in Linux

To list all users in Linux:

1
cat /etc/passwd

See only the first word before double colon (:)
for exampple, user “root” will look like: root:x:0:0:root:/root:/bin/bash

And to list all groups do the following

1
cat /etc/group
Posted in Linux, Operating System | Leave a comment

How Big is The Big Apple?

Do you know how much bigger is Apple compared to the other big companies in the US?
http://www.greenandredmarket.com/menu/biggestcompanies.htm
And scroll to the lower part of the page.

I’m not an apple fan boy but I can see that our society buys a lot of apple products: iPhones, iPad, iMac, MacBook Pro, Macbook Air.

Posted in Investment, Stock Market | Leave a comment

Internet Explorer (IE) friendly table DOM manipulation

Occasionaly we can manipulate HTML DOM easily by accessing the innerHTML of an element. In IE however, the following elements’ innerHTML are read only: COL, COLGROUP, FRAMESET, HEAD, HTML, STYLE, TABLE, TBODY, TFOOT, THEAD, TITLE, TR.

This code will fail in IE

1
tBodyEl.innerHTML = '<tr height="24px"><td colspan="7">' + 'Some Cell Value' + '</td></tr>';

A more IE friendly solution using DOM table functions.

1
2
3
4
5
var row = tBodyEl.insertRow(0);
row.setAttribute('height', '24px');
var cell = row.insertCell(0);
cell.setAttribute('colspan', '7');
cell.innerHTML = 'Some Cell Value';
Posted in javascript, Web Development | Leave a comment