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Overriding Methods | Intermediate PHP

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. Methods within a child class can override the parent class, simply by redefining your own version. The parent’s display method on line 5 is overridden in the child’s redefinition on line 13:. Php class ParentClass { public $name; public function display() { $output = $this- name; $output .= "Just some random text that's going to be overridden! Just some random text that's going to be overridden!

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class | Intermediate PHP

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. Is used to define a user defined (abstract) data type. It is then followed by the user defined class name. Identifier) and a pair of curly braces . As you can see the above is not too useful on its own and this is because classes usually contain class members, consisting of a ttributes (/properties) and b. Leave a Reply Cancel reply. You must be logged in. To post a comment. Enter the destination URL.

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Document Type Definition | HTML

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. The DTD tells the browser what version of the document type the page is adhering to. Does not have a closing tag. DOCTYPE HTML PUBLIC “-/ W3C/ DTD HTML 4.01 Transitional/ EN”. 8220;http:/ www.w3.org/TR/html4/loose.dtd”. DOCTYPE HTML PUBLIC “-/ W3C/ DTD HTML 4.01/ EN”. 8220;http:/ www.w3.org/TR/html4/strict.dtd”. Leave a Reply Cancel reply. You must be logged in. To post a comment.

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Variables | JavaScript

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. Named ‘container’ for a piece of computer memory that holds a specified value. Variable names consist of letters, number, , $. Cannot start with a number. Variables are declared by using the keyword var. Followed by the desired name. e.g. Name ; / declaration of a variable, undefined. Variables with no value are Undefined. Age = 42 ; / definition of a variable. Var myNumber = 200 ; / integer. Leave ...

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<noscript> Element | JavaScript

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. If JavaScript is not enabled or the browser does not support JavaScript, a message can be displayed to the user using the noscript element, and is generally placed after the script tags, like so:. Html head title JavaScript /title /head body script document.write("JavaScript is enabled"); /script noscript Please enable JavaScript, or try a JavaScript enabled browser. /noscript /body /html.

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Destructor | Intermediate PHP

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. PHP (like Java, but unlike C ) has automatic garbage collection. Unless otherwise explicitly carried out, objects are automatically destroyed at the end of the script they were created in. In some cases, it might sometimes be useful to specifically carry out a task when an object is destroyed, say to close a database connection. Br "; } public function destruct() { echo "Yalp! The script ends here.

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Inline Elements | HTML

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. Do not start with a new line. Generally contain data and other inline level elements. Example showing inline elements being applied:. DOCTYPE html html head title My Document Title /title /head body h1 My sup first /sup Heading /h1 p Paragraph b one /b /p p i Paragraph /i two /p p del Paragraph three /del /p /body /html. Save and refresh browser:. Leave a Reply Cancel reply. You must be logged in.

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Variables | PHP Essentials

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. Begin with a $. Followed by name, starting with a letter or underscore. Don’t need to be declared. Assigned with a single equals sign =. MyVar = 10 ;. YourVar = “Potato” ;. Prefix and ampersand to variable being referenced. PotatoVar = &$yourVar ;. Any changes to the original or referenced variable will be seen in each other. i.e. if you change one, then you change them all. You must be logged in.

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Behaviours | OOP

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Technical Tutorials: Free. Good Quality. To the point! Skip to primary content. Skip to secondary content. An object’s behaviours define the things an object can do. In OO terminology, behaviours are referred to as methods. Methods are akin to functions in general programming terminology. Methods may alter the state of an object (setter) or simply provide ways of accessing it (getter). Leave a Reply Cancel reply. You must be logged in. To post a comment. All Content © Derrick Robinson 2012-2016.

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Investment Appraisal Techniques | Prince2

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Skip to primary content. Skip to secondary content. Through-life costs Analysing the total cost of implementation and any incremental operations and maintenance costs. Analysing the total value of the benefits less the cost of implementation and ongoing operation calculated over a defined period. Profits or savings resulting from investments (this is the same as net benefits if the benefits were only financial). A means of expressing future benefits based on the current value of money. For example, the p...