![]() ![]() Next, we’ll look into the HTML and tags and how we can use these to input array-like data from the user. 'productIDs' => array(11, 442, 532, 1341),Įcho $arr // Accesses 3rd value in the array, prints 75Įcho $arr // Prints john doeĮcho $arr // prints 11Įcho $arr() // Executes myMethod function prints Hello, World!īy now, you might have a basic understanding of how PHP arrays work. 'orderDetails' => array( // here we have a multidimentiional array as a value He holds a Master's degree in Computer Engineering from the University of Illinois at Urbana-Champaign and has over ten years' experience in managing development of software projects.'trx' => array(33, 55, 75, 113, 180), // one dimentional array As each month is processed, that value is added to the result array, until it is finally passed back upon completion as the return value of the array_reduce function.Īlthough this operation could be programmed using several lines of code and an iterator, the one-liner highlights the list-folding capabilities of PHP, and provides an easy way to dynamically generate associative arrays for in-line HTML processing.Īndrew Palczewski is CEO of apHarmony, a Chicago software development company. In this application, array_reduce takes an array of the 12 numerical months, and then creates a new array of month number to month name pairs. This running result is called the “carry”. As it does so, it also passes along a running value, or result, that is modified by each iteration of the call. ![]() The way the function works, is that array_reduce iteratively calls the “callback” function for each element in the array. Mixed callback ( mixed $carry, mixed $item ) Mixed array_reduce ( array $array, callable $callback ) Although normally this function is used to calculate sums or aggregates over an array of values, it can also walk over an array and iteratively perform a folding operation. The heavy lifting, however, is done by the array_reduce function. ![]() Then that date object with the proper month is parsed by the date function to return the human-readable month name. By plugging the numerical month into the mktime function, a date object is created. Next, the date function takes the work out of translating a numerical value (1 through 12), to the actual month name. Given a start value, end value, and step size, the range function will populate an array in shorthand without requiring the developer to write out each individual item. Range is a convenient PHP function for numerical analysis, which works similar to the Matlab pre-populated array definitions. There are three primary functions that make this technique work – range, date, and array_reduce. In this specific implementation, it is useful for plug-in to a drop-down list-of-values generator, however the techniques used are broadly applicable to a variety of situations.Īrray_reduce(range(1,12),function($rslt,$m)) In this tutorial, we’ll go over a PHP one-liner that creates an associative array of month numbers to month names. Since the language implements weak type-checking, interesting functionality can be built in less lines of code than that required by more traditional web languages. One of the most elegant features of PHP is its flexibility in array manipulation. ![]()
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