Category: 12. PHP

In PHP, it is possible to write a function capable of accepting a list of arguments with variable number of elements. To declare a variable argument list, the name of the argument is prepended by the “…” (three dots) symbol. The values passed are collected into an array with the argument’s name. To call such…

The feature of Named Arguments has been introduced in PHP with the version 8.0. It is an extension of the existing mechanism of passing positional arguments to a function while calling. By default, values of passed arguments are copied to the corresponding formal arguments at the same position. This feature of named arguments in PHP…

Like most of the languages that support imperative programming, a function in PHP may have one or more arguments that have a default value. As a result, such a function may be called without passing any value to it. If there is no value meant to be passed, the function will take its default value…

PHP uses the “call by value” mechanism, by default, for passing arguments to a function. If the arguments within the function are changed, the changes do not reflect outside of the function. To allow a function to modify its arguments, the “call by reference” mechanism must be used. In PHP, a reference variable acts as…

By default, PHP uses the “call by value” mechanism for passing arguments to a function. When a function is called, the values of actual arguments are copied to the formal arguments of the function’s definition. During the execution of the function body, if there is any change in the value of any of the formal arguments,…

A function in PHP may be defined to accept one or more parameters. Function parameters are a comma-separated list of expressions inside the parenthesis in front of the function name while defining a function. A parameter may be of any scalar type (number, string or Boolean), an array, an object, or even another function. The…

Like most of the programming languages, a function in PHP is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reuse. PHP supports a structured programming approach by arranging the processing logic by defining blocks of…

It was not possible to declare a constant array before PHP version 5.6. From PHP 5.6 onwards, you can use the “const” keyword to declare a constant array. From PHP 7 onwards, constant arrays can also be formed with define() function. A constant array is an array which cannot be modified after it has been…

PHP Array Functions allow you to interact with and manipulate arrays in various ways. PHP arrays are essential for storing, managing, and operating on sets of variables. PHP supports simple and multi-dimensional arrays and may be either user created or created by another function. Installation There is no installation needed to use PHP array functions; they…

A multidimensional array is an array of arrays. In a PHP array, each element can be another array. If the array consists of values or key-value pairs with values being of singular scalar types, it is a one-dimensional array. If each element in an array is an array of one or more scalar values, it…