Anonymous Functions
Anonymous functions, also called lambda functions or closures, are a special type of function in PHP that do not have a specified name. Instead of declaring them with a name like regular functions, you define them directly and often assign them to a variable.
Anonymous functions especially useful when you need a quick, one-off function, such as when passing a callback to another function or creating small bits of logic that do not require a permanent name in your code.
You should use an anonymous function when you want to:
- Create a function for temporary use;
- Pass a function as an argument to another function;
- Store a function in a variable for later use;
- Avoid polluting the global namespace with named functions.
anonymous_function_example.php
123456789<?php // Assigning an anonymous function to a variable $greet = function($name) { return "Hello, " . $name . "!"; }; // Calling the anonymous function using the variable echo $greet("PHP learner");
Anonymous functions are an important feature for writing flexible, reusable, and concise code, especially when working with arrays, callbacks, or event-driven programming.
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Anonymous functions, also called lambda functions or closures, are a special type of function in PHP that do not have a specified name. Instead of declaring them with a name like regular functions, you define them directly and often assign them to a variable.
Anonymous functions especially useful when you need a quick, one-off function, such as when passing a callback to another function or creating small bits of logic that do not require a permanent name in your code.
You should use an anonymous function when you want to:
- Create a function for temporary use;
- Pass a function as an argument to another function;
- Store a function in a variable for later use;
- Avoid polluting the global namespace with named functions.
anonymous_function_example.php
123456789<?php // Assigning an anonymous function to a variable $greet = function($name) { return "Hello, " . $name . "!"; }; // Calling the anonymous function using the variable echo $greet("PHP learner");
Anonymous functions are an important feature for writing flexible, reusable, and concise code, especially when working with arrays, callbacks, or event-driven programming.
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