Category Archives: micro tutorial

How to Setup Different Error Messages for Each Zend Form Element Validator

Posted on November 23, 2011 by Stoimen

Anyone who has worked with that has come across this problem. I’d like to show different error message on each validator attached to a Zend_Form_Element. Let’s say we validate an text input field. We want it to contain only digits, … Continue reading →

Posted in micro tutorial, zend framework | Tagged 0, Elementary arithmetic, Error message, Mathematics, measurement, Nothing, Numbers, Pi, zend framework | 1 Comment

PHP: Don’t Call the Destructor Explicitly

Posted on November 14, 2011 by Stoimen

“PHP 5 introduces a destructor concept similar to that of other object-oriented languages, such as C++”[1] says the documentation for destructors, but let’s see the following class. class A { public function __construct() { echo ‘building an object’; } … Continue reading →

Posted in micro tutorial, PHP | Tagged destructor, how-to, micro tutorial, Object-oriented programming, oop, PHP, php examples, research, Scripting languages, tutorial | 7 Comments

How to Check if a Date is More or Less Than a Month Ago with PHP

Posted on November 4, 2011 by Stoimen

Let’s say we have the following problem: we have to check whether a date is more than a month ago or less than a month ago. Many developers go in the wrong direction by calculating the current month and then … Continue reading →

Posted in micro tutorial, PHP | Tagged date and time, dates, datetime, how-to, micro tutorial, PHP, strtotime, tutorial, unix timestamp | 1 Comment

Object Cloning and Passing by Reference in PHP

Posted on October 27, 2011 by Stoimen

In PHP everything’s a reference! I’ve heard it so many times in my practice. No, these words are too strong! Let’s see some examples. Passing Parameters by Reference Clearly when we pass parameters to a function it’s not by reference. … Continue reading →

Posted in micro tutorial, PHP | Tagged C, Clone, Cloning, Comparison of programming languages, Computer programming, Computing, Curly bracket programming languages, Java programming language, PHP, PHP programming language, Procedural programming languages, Scripting languages, Software engineering | 3 Comments

Thing to Know About PHP Arrays

Posted on October 19, 2011 by Stoimen

Consider the following case. We have an array with identical keys. $arr = array(1 => 10, 1 => 11); What happens when the interpreter reaches this line of code? This is not a syntax error and it is completely valid. … Continue reading →

Posted in micro tutorial, PHP | Tagged Arrays, C programming language, Comparison of programming languages, Computer programming, Computing, Data structures, Data types, Foreach, how-to, interpreter, micro tutorial, PHP, PHP arrays, PHP micro tutorial, php tutorial, programming, tutorial, web development, webdev | Leave a comment