PHP and tips http://www.phpntips.com PHP blog: Zend framework, SVN, code snippets, dev notes, tutorials Tue, 07 Feb 2012 00:58:42 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 DNS glue record http://www.phpntips.com/dns-glue-record-2012-02/ http://www.phpntips.com/dns-glue-record-2012-02/#comments Tue, 07 Feb 2012 00:58:42 +0000 admin http://www.phpntips.com/dns-glue-record-2012-02/ What Is A Glue Record – Domainmonster FAQ

Glue records are required when you wish to set the name servers of a domain name to a hostname under the domain name itself.

]]> http://www.phpntips.com/dns-glue-record-2012-02/feed/ 0 MongoDB http://www.phpntips.com/mongodb-2012-02/ http://www.phpntips.com/mongodb-2012-02/#comments Thu, 02 Feb 2012 23:42:38 +0000 admin http://www.phpntips.com/mongodb-2012-02/ Just had a really interesting and exaustive discussion about MongoDB with Dereck at the PHP London meetup.

It seems like a candidate for the next db refactor of the activity stream I’m working on for bravenewtalent.com.

I didn’t know that many websites (fuorsquare, github, craiglist) were already using it

and interesting talk about unicode by richard Johnson, with a bit of history and some example of what happens when the the encoding is wrongly set. I was already aware of those problems and solutions, but good to see some other working example, history and clarifications.

]]> http://www.phpntips.com/mongodb-2012-02/feed/ 0 Find Out Linux Distribution Name and Version http://www.phpntips.com/find-out-linux-distribution-name-and-version-2012-02/ http://www.phpntips.com/find-out-linux-distribution-name-and-version-2012-02/#comments Thu, 02 Feb 2012 01:30:36 +0000 admin http://www.phpntips.com/find-out-linux-distribution-name-and-version-2012-02/

To find out what version of Linux (distro) you are running, enter the following command at the shell prompt:
$ cat /etc/*-release

]]> http://www.phpntips.com/find-out-linux-distribution-name-and-version-2012-02/feed/ 0 Install GIT on CentOS server http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2-2012-02/ http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2-2012-02/#comments Thu, 02 Feb 2012 01:29:41 +0000 admin http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2-2012-02/ Git 1.7.6.1 on CentOS 5.6 | Webtatic.com

If you haven’t set up the Webtatic repository in yum, then add it in the command-line as following:

rpm -Uvh http://repo.webtatic.com/yum/centos/5/latest.rpm
Now install git:
yum install –enablerepo=webtatic git-all

]]> http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2-2012-02/feed/ 0 Netbeans Codesniffer plugin http://www.phpntips.com/netbeans-codesniffer-plugin-2012-02/ http://www.phpntips.com/netbeans-codesniffer-plugin-2012-02/#comments Wed, 01 Feb 2012 19:54:03 +0000 admin http://www.phpntips.com/netbeans-codesniffer-plugin-2012-02/ Just found an article explaing how to use a Netbeans plugin for Code sniffer

The github repository is here

]]> http://www.phpntips.com/netbeans-codesniffer-plugin-2012-02/feed/ 0 Formatting/coloring log files on the fly with tail and sed http://www.phpntips.com/formattingcoloring-log-files-on-the-fly-with-tail-and-sed-2012-01/ http://www.phpntips.com/formattingcoloring-log-files-on-the-fly-with-tail-and-sed-2012-01/#comments Tue, 31 Jan 2012 19:01:12 +0000 admin http://www.phpntips.com/formattingcoloring-log-files-on-the-fly-with-tail-and-sed-2012-01/ I often monitor MySQL queries for some complex application components that use an ORM (Doctrine).
I’ve just made a special logger that re-runs all the quries with an EXPLAIN and log the “Extra” column of the explain query, in order to spot queries that can be improved. From the log, I pipe the result to “sed” with a regular expression, and colouring some text.
I’m sure you are not interesting in this post. I just write some posts in order to find them easily in the future when I need them, and possibly helpting somebody else googling the same need.
Here the lines I’ve added to my ~/.bashrc
COLOR_RED=`echo -en '\e[31m'`
COLOR_YELLOW=`echo -en '\e[93m'`
COLOR_RESET=`echo -en '\e[00m'`
alias querylog="tail -f /var/www/bnt/Public/application/logs/queries.log | sed -E \
's/(where|intersect|temp|filesort)/$COLOR_RED\1$COLOR_RESET/g'"
]]> http://www.phpntips.com/formattingcoloring-log-files-on-the-fly-with-tail-and-sed-2012-01/feed/ 0 When NOT to use a mysql subqueries http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2012-01/ http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2012-01/#comments Sun, 29 Jan 2012 16:46:17 +0000 admin http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2012-01/ MySQL optimizer rewrites uncorrelated subqueries (when the inner query does NOT use fields of the outer query) as correlated query, with perrformances of quadratic order rather than linear.

If the inner query does not use a WHERE with fields on the outer query, rewrite it as a JOIN

Source: MySQL :: MySQL 5.5 Reference Manual :: E.4 Restrictions on Subqueries

The problem is that, for a statement that uses an IN subquery, the optimizer rewrites it as a correlated subquery. Consider the following statement that uses an uncorrelated subquery:
SELECT … FROM t1 WHERE t1.a IN (SELECT b FROM t2);
The optimizer rewrites the statement to a correlated subquery:
SELECT … FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE t2.b = t1.a);
If the inner and outer queries return M and N rows, respectively, the execution time becomes on the order of O(M×N), rather than O(M+N) as it would be for an uncorrelated subquery.

]]> http://www.phpntips.com/mysql-uncorrelated-subqueries-poor-performances-2012-01/feed/ 0 Markdown, markup language http://www.phpntips.com/markdown-markup-language-2012-01/ http://www.phpntips.com/markdown-markup-language-2012-01/#comments Sun, 29 Jan 2012 16:30:07 +0000 admin http://www.phpntips.com/markdown-markup-language-2012-01/ Markdown – Wikipedia, the free encyclopedia

Markdown is a lightweight markup language, originally created by John Gruber and Aaron Swartz allowing people “to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML)”.[1] The language takes many cues from existing conventions for marking up plain text in email.

]]> http://www.phpntips.com/markdown-markup-language-2012-01/feed/ 0 Usage statistics and market share data of PHP on the web http://www.phpntips.com/usage-statistics-and-market-share-data-of-php-on-the-web-2012-01/ http://www.phpntips.com/usage-statistics-and-market-share-data-of-php-on-the-web-2012-01/#comments Sun, 29 Jan 2012 16:28:07 +0000 admin http://www.phpntips.com/usage-statistics-and-market-share-data-of-php-on-the-web-2012-01/ Usage Statistics and Market Share of PHP for Websites, January 2012

This report shows the usage statistics and market share data of PHP on the web

]]> http://www.phpntips.com/usage-statistics-and-market-share-data-of-php-on-the-web-2012-01/feed/ 0 PHPUnit mock object, returnValueMap for methods with optional parameters http://www.phpntips.com/phpunit-mock-object-returnvaluemap-for-methods-with-optional-parameters-2012-01/ http://www.phpntips.com/phpunit-mock-object-returnvaluemap-for-methods-with-optional-parameters-2012-01/#comments Wed, 25 Jan 2012 00:05:23 +0000 admin http://www.phpntips.com/phpunit-mock-object-returnvaluemap-for-methods-with-optional-parameters-2012-01/ thanks to this post I figured out that the stub
PHPUnit_Framework_MockObject_Stub_ReturnValueMap
counts the number of ALL the parameters of the function (including the optional ones).
So the map must be
array(
 array(inputParam, …inputParamN, optionalParam1, …optionalParam2, return value )
)
]]> http://www.phpntips.com/phpunit-mock-object-returnvaluemap-for-methods-with-optional-parameters-2012-01/feed/ 0