Yes, csv is simple BUT if you want it readable in Excel (at least on Windows), you need to prepend it with a hidden BOM and as UTF8. Tried every possible suggestions in stackoverflow that says it works BUT it doesn't. So, try the phpoffice approach. It works for me... Install 1~$ cd /an/isolated/directory 2~$ composer …

Overview In contrast to a named function like: 1<?php 2function multiply($x, $y) 3{ 4return $x * $y; 5} An anonymous or unnamed-function, well has no name: 1<?php 2function ($x, $y) { 3return $x * $y; 4}; //closing semicolon here is mandatory. NOTE: semicolon after the closing curly bracket is mandatory as it is …

Suppose that you have an array that holds the lengths of squares: 1<?php 23$lengths = [10, 20, 30]; To calculate the areas of the squares, you may come up with the foreach loop like this: 1<?php 23$lengths = [10, 20, 30]; 45// calculate areas 6$areas = []; 78foreach ($lengths as $length) { 9$areas[] = $length * …

Callbacks can be denoted by the "callable" type declaration. Example: 1icasimpan$ nl -ba callable_example.php 21 <?php 32 function printFormatted(callable $format, $str) { 43 echo $format($str); 54 echo "<br>"; 65 } 76 87 function exclaim($str) { return $str . "!"; } 98 …

An iterable is any value which can be looped through with a foreach() loop. The iterable pseudo-type was introduced in PHP 7.1, and it can be used as a data type for function arguments and function return values. Example 1<?php 2function printIterable(iterable $myIterable) { 3foreach($myIterable as $item) { 4echo …

This is quite confusing but as soon as you see the logic, it would make sense. Say you have this code: 1<?php 23$my_var= 'title'; 4$$my_var = 'PHP variable variables'; // $my_var has a value of 'title'. So the 2nd '$' makes it $title 5echo $title; // ...so, YOU see now where you will …

There's what is called a "Data Structure" or DS package available in packagist. Install 1~$ cd /an/isolated/directory 2~$ composer require php-ds/php-ds 3~$ composer install Try this code: 1<?php 2require __DIR__ . '/vendor/autoload.php'; 345$stack = new \Ds\Stack(); 6//$stack = new Stack(); …

As of php7.4, php arrow function was added as a more concise syntax for anonymous functions. Basic syntax: 1fn (arguments) => expression; Is functionally equivalent to the following anonymous function: 1function(arguments) { return expression; } Unlike anonymous functions, arrow functions can automatically access …