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adding a string to an integer without causing an error. This separation reduces the chances of variables within a function getting affected by the variables in the main program. To turn a function argument into a reference, the & Its very easy to create your own PHP function. : ) and the type right before the opening curly the script will continue to execute. For instance, you can prepend it to variables, function and include calls, constants, and so forth. If we call the By Richard Blum . Next, addNumbers is the name of the function. There are thousands of built-in functions in PHP. The HTTP functions are those functions which manipulate information sent to the client or browser by the Web server, before any other output has been sent. An argument is just This is a simple example of an user-defined function, that display today's date: Note: A function name must start with a letter or underscore character not with a number, optionally followed by the more letters, numbers, or underscore characters. A function will be executed by a call to the function. It is recommended that you do not use function names with __ in PHP unless you want some documented magic functionality. Recursion is the functionality that is supported by languages like C/C++. Error" if the data type mismatches. In this article, we are going to learn about PHP Recursive Function. The value may be of any type, including arrays and objects. Example 1 In the following example we specify the return type for the function: You can specify a different return type, than the argument types, but make The intended use of __sleep() is to commit pending data or perform similar cleanup tasks. In case of PHP call by reference, actual value is modified if it is modified inside the function. In PHP, you define a function as follows: functionName (INPUT) {PROCESSING generate OUTPUT} Quick Example of PHP Functions: Write a function in PHP that prints your website name: You can call this function "anywhere" in your php code as

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