函数式编程 Functional Programming 函数在 PHP 中是”第一等公民”,即函数可以被赋值给一个变量,包括用户自定义的或者是内置函数,然后动态调用它。函数可以作为参数传递给其他函数(这一特性被称为高阶函数),也可以作为函数返回值返回。 PHP 支持递归,也就是函数自己调用自己,但多数 PHP 代码使用迭代
The launch of PHP4 marked serious progress in the usage of the programming language. This is the first version powered by the Zend Engine, which allows working with encoded files through the Zend Optimizer.PHP 4also saw the introduction of the superglobals - $_GET, $_POST, $_SESSION. For...
Inserting the parentheses suggested above does not change the meaning of the code, but their use misleads inexperienced programmers to expect that things like this will work in a similar manner: <?php function my_print($a) { print($a); } my_print (trim($var)=="") ? "empty" : "not...
Our name “Toptal” comes from Top Talent—meaning we constantly strive to find and work with the best from around the world. Our rigorous screening process identifies experts in their domains who have passion and drive.Of the thousands of applications Toptal sees each month, typically fewer than...
In later chapters, I’ll show you how FP can be used in conjunction with OO and unpack the meaning of “OO in the large, FP in the small.”Which PHP version to use?As I mentioned before, you can implement a functional style using PHP 5.3+. This is around the time that the ...
In this first article, I'll help you get your feet wet by introducing the PHP programming language, and how to use it to write dynamic Web pages with PHP. Before I get to that, I shall stop to explain how server-side scripting, and PHP in particular, differs from other Web scripting...
Redis scripts are written in the Lua programming language.The eval method can be a bit scary at first, but we'll explore a basic example to break the ice. The eval method expects several arguments. First, you should pass the Lua script (as a string) to the method. Secondly, you ...
Redis scripts are written in the Lua programming language.The eval method can be a bit scary at first, but we'll explore a basic example to break the ice. The eval method expects several arguments. First, you should pass the Lua script (as a string) to the method. Secondly, you ...
* it is up to the error handler to impart some meaning on the different error levels. You could make your custom error handler echo all errors, even if error reporting is set to NONE. * so what does the @ operator do? It temporarily sets the error reporting level to 0 for that line...
2. Is PHP a case-sensitive scripting language? 3. What is the meaning of PEAR in PHP? 4. How is a PHP script executed? 5. What are the types of variables present in PHP? 6. What are the main characteristics of a PHP variable? 7. What does the phrase ‘PHP escape’ mean? 8. ...