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The Model-View-Controller (MVC) is an architectural pattern that separates an application into three main logical components: the model, the view, and the controller.
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Then, include “error_reporting(E_ALL)” in your code to display all types of error messages during the script execution. How can you enable error reporting in PHP?Ĭheck if “display_errors” is equal “on” in the php.ini or declare “ini_set(‘display_errors’, 1)” in your script.A Trait cannot be instantiated on its own. Traits are a mechanism that allows you to create reusable code in languages like PHP where multiple inheritance is not supported. They both include a specific file but on require the process exits with a fatal error if the file can’t be included, while include statement may still pass and jump to the next step in the execution. What’s the difference between the include() and require() functions?.An example of a Fatal error would be accessing a property of a non-existent object or require() a non-existent file. An example would be include() a file that does not exist.įatal – this type of error causes a termination of the script execution when it occurs. Warnings – more important errors than Notices, however, the scripts continue the execution. An example of a Notice would be accessing an undefined variable. Notices – Simple, non-critical errors that occur during the script execution. In PHP there is three main type of errors: What are the main error types in PHP and how do they differ?.The second is the concatenating assignment operator (‘.=’), which appends the argument on the right side to the argument on the left side:
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The first is the concatenation operator (‘.’), which returns the concatenation of its right and left arguments. To concatenate two string variables, dot(.) operator is used by two ways. When a PHP page is accessed, the PHP code is read or “parsed” by the server the page resides on and the output from the PHP functions on the page are typically returned as HTML code, which can be read by the browser. PHP is called hypertext preprocessor as its libraries are already compiled. PHP code can be simply mixed with HTML code, or it can be used in combination with various templating engines and web frameworks. PHP earlier started as Personal Home Page tools, developed by Rasmus Lerdorf in 1995, and it further acquired the name “PHP Hypertext Preprocessor” which is the recursive backronym along the way to represent its expanded abilities. What is the meaning of Hypertext Preprocessor?.PHP (recursive acronym for PHP: Hypertext Preprocessor) is the most widely used open source scripting language, majorly used for web development and application development and can be embedded into HTML.
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Top 100 PHP interview Questions and Answers for 2017