Tag Archives: script

Stuff I need to look-up every time

You lost your leading zeros of your varchars importing/exporting your data. You have this example data in your table storagebins:

area = L, row = 1, rack = 2, shelf = 3
and it is supposed to look like this
area = L, row = 001, rack = 02, shelf = 03

Use this SQL to correct this:

UPDATE storagebins SET row=LPAD(row, 3, '0');
UPDATE storagebins SET rack=LPAD(rack, 2, '0');
UPDATE storagebins SET shelf=LPAD(shelf, 2, '0');

VBA Macro to Convert Dates in a Range – the Dirty Way

I used this hacked Excel-Macro to convert all dates in a selected range from a manual data import using Excel to generate all required INSERTs for our MySql database

  • from 03.08.2011 16:51:01
  • to 2011-08-03 16:51:01

In case you wonder, where you can find your Visual-Basic editor and execute your VBA-code… follow these instructions. Here is the code:

Sub PrefixSingleQuoteToRange()
Dim cell As Range
Dim year As String
Dim month As String
Dim day As String

For Each cell In Selection.Cells
' Convert 03.08.2011 16:51:01 to 2011-08-03 16:51:01
year = Mid(DateValue(cell), 7, 4)
month = Mid(DateValue(cell), 4, 2)
day = Mid(DateValue(cell), 1, 2)
cell = "'" & year & "-" & month & "-" & day & " " & TimeValue(cell)
Next

End Sub

If you scratch your head… This is how I ‘generated’ my INSERT-statements:

  • One sheet equals one table.
  • Each line represents a record.
  • For example you have A to L fields paste the following into your cell M:

="INSERT INTO orders (order_id, processing_start_datetime, processing_end_datetime, delivery_datetime, staff_id, store_id, name, phone, comment_order, comment_procession, created_at, updated_at) VALUES ('"&A2&"', '"&B1&"' ,'"&C1&"' ,'"&D1&"' ,'"&E1&"' ,'"&F1&"' ,'"&G1&"' ,'"&H1&"' ,'"&I1&"','"&J1&"','"&K1&"','"&L1&"');"

  • It is a lot of copy and pasting. But in the end all your INSERTS can be copied and pasted into a txt-file to be dumped into your database.

If you know a smarter way to ‘import’ MSSQL data into MySql, please let me know. And I guess there must be many of them ;).

Clean your PHP4 Legacies using sed

If you have to deal with very old PHP4 legacy code containing every syntax crime you may know from the early years, how would you handle it? Give it to your junior people to fix it manually? I like to have at least some handy helpers for the first rough corrections. I found sed to be a very powerful helper here.

Code you might encounter - associative array elements without quotes.

I spent quite some time to find useful regular expressions to help me. This is how I did this:

A way to test your regular-expression is to echo a sample and apply your regex to test the results:

echo '$_REQUEST[action] reise_l_topic_ids[] $dat[ticket_order]' | sed "s/$([a-zA-Z0-9_]+)[([a-zA-Z0-9_]+)]/$1['2']/g"

Once it works you can apply your regex to one file:

sed -i "s/$([a-zA-Z0-9_]+)[([a-zA-Z0-9_]+)]/$1['2']/g" my_old_file.php

Or apply your regex to all *.php-files recursively below the current directory to a whole project:

find . -name "*.php" -exec sed -i "s/$([a-zA-Z0-9_]+)[([a-zA-Z0-9_]+)]/$1['2']/g" '{}' ;

By the way: The usage of sed works fine on your linux command line, but not on OSX. The syntax is slightly different here (sed -i “” -e “s/blah/blubb/” file). This is of course only a start to automate otherwise painfull and boring corrections down to just a few seconds. It will not save you from special manual work and break syntax at some points. But it weeds out 90% and leaves you with the other 10% acutal manual work.

You could imagine many more sed regexes e.g. to replace short tags <?=$my_var?> to a proper <?php echo $my_var; ?> etc.

echo '<?=$out?> sakdhs sakdhas k <?php echo $xyz; ?> ddd' | sed "s/<?=/<?php echo /g";

I will collect more regexes as I need and find them. If you have ideas please add them in the comment section.

Backup MySql-Database using only FTP

We have just had the case of having ftp access to a site on a shared hosting LAMP webspace but needed also the database and mainly the database scheme to setup our own development-system for the app. This is actually very straight forward using the following snippet uploaded and executed on the webserver:

<?php
exec( 'mysqldump -h dbXXX.1und1.de -u dboYYY -pZZZ dbYYY > dump.sql', $ret );
var_dump($ret);

This is what you do:

  • Find the configuration with the db-credentials in the source of the application and replace
    • dbXXX.1und1.de with the hostname,
    • dboYYY with the username,
    • ZZZ with the password (notice there is NO blank between the option -p and the password!),
    • dbYYY with the database you would like to backup.
  • Save the snippet as file with extension .php and copy it via ftp to the webspace.
  • Find the URL to execute the script.
  • If it worked, there should be a new file dump.sql in the same directory, download it, it contains the db-schema and all data.
  • Delete both files to wipe your traces.

If it does not work try something like “exec(‘ls -la’);”. If you see the contents of the directory you can use the exec-function and the problem is something else.

Happy hacking!

A Simple PHP Google Sitemap Generator

I just hacked together a very simple class and CLI script to help me generate Google sitemap XML on a daily basis using PHP. If you have not yet heard of it: Google sitemaps help you promote your content if you have certain deep links that only show up if a visitor for example performs a search and clicks a result.

Check the documentation of the Google Sitemap Format

Here is the code: Google Sitemap Generator

It works like this:

$ php generate_gsitemaps.php; #will generate your standard sitemap
$
php generate_gsitemaps.php -e > my_sitemap.xml; #echo sitemap xml to another file

Example: generated_example_sitemap.xml

Have fun being found!

Use of MySql Variables

Case: I was building a CLI script to aggregate data from one MySql database and write results to another MySql database using 2 open db-connections. This way the script’s execution time was in the some-minutes-range… not good! I tried a more effective attempt: I let the CLI script output all necessary statements to drop and create all needed tables and fill them with insert-statements. I called it like this from the command line and diverted output to a file:

$ php aggregatData.php > all_sql_i_need.sql

I could then import the whole thing in one go into my target database like this:

$ mysql the_dbname -h localhost -uMarco -pPass < all_sql_i_need.sql

Insight: The execution-time was way better than my first attempt and took only seconds. I could also have combined the two lines in a shell-script.

The problem with the generated SQL statements was, that the data also contained relations between primary and foreign keys of records and that these IDs were generated at import-time by auto_increment fields. I solved this issue by using MySql variables which can be set and use d again like this:

INSERT INTO gruppen (name) VALUES ('Gruppe 1');
SET @temp_gruppe_id = LAST_INSERT_ID();
INSERT INTO gruppe_eigenschaften (id_gruppe, name, wert) VALUES
     (@temp_gruppe_id, 'email1', 'email1@emailxxx.com');

The variable @temp_gruppe_id is set and can be used in the subsequent SQL statements. It also worked in MySql4.

Here is an example of SQL statements illustrating this mechanism in the above mentioned script. You can cut-and-paste it into your PhpMyAdmin.