In PHP, there are three types of arrays: The array with a number index is called an indexed array. Associative array: An array with name as one of its keys.
A formula that can conduct many calculations on one or more items in an array is known as an array formula. An array can be thought of as a set of values in a row or column, or as a set of values in a combination of rows and columns. Array formulas can be used to execute complex operations such as quickly creating sample datasets.
A function is a collection of statements that can be used over and over again in a programme. When a page loads, a function will not run automatically. A call to a function will cause it to be performed.
Other programming languages' functions are similar to PHP's. A function is a piece of code that takes another input in the form of a parameter, processes it, and then returns a value. Many functions, such as fopen() and fread(), have already been encountered.
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