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1. www.php.net › manual › enPHP: is_a - Manual

   www.php.net › manual › en

   is_a (PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8) is_a — Checks whether the object is of a given type or subtype

2. stackoverflow.com › questions › 2835627php is_function() to determine if a variable is a function

   stackoverflow.com › questions › 2835627

   May 14, 2010 · I was pretty excited to read about anonymous functions in php, which let you declare a variable that is function easier than you could do with create_function. Now I am wondering if I have a function

3. www.geeksforgeeks.org › php › php-is_a-functionPHP | is_a() function - GeeksforGeeks

   www.geeksforgeeks.org › php › php-is_a-function

   Jul 11, 2025 · Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more.

4. www.w3schools.com › php › php_functionsPHP Functions - W3Schools

   www.w3schools.com › php › php_functions

   PHP User Defined Functions Besides the built-in PHP functions, it is possible to create your own functions. A function is a block of statements that can be used repeatedly in a program. A function is not executed automatically when a page loads. A function is executed only when it is called.

5. www.tutorialspoint.com › php › php_function_is_aPHP is_a Function - Online Tutorials Library

   www.tutorialspoint.com › php › php_function_is_a

   Learn how to use the PHP is_a function to check object types effectively in your code. Discover examples and best practices for implementation.

6. php.watch › codex › is_ais_a Function • PHP.Watch

   php.watch › codex › is_a

   PHP Codex data is built by collecting PHP symbol data on the latest release of each PHP version, or the nightly builds of the active development branch, and analyzing them to determine their availability and signature data. This ensures that symbol changes and availability is technically the most accurate. The parameter descriptions, INI descriptions, and return values are from the official ...

7. People also ask

   How many built-in functions are there in PHP?

   • PHP has over 1000 built-in functions that can be called directly, from within a script, to perform a specific task. Please check out our PHP reference for a complete overview. Besides the built-in PHP functions, it is possible to create your own functions. A function is a block of statements that can be used repeatedly in a program.

   PHP Functions - W3Schools

   www.w3schools.com/php/php_functions.asp

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   Can I create my own PHP functions?

   • Besides the built-in PHP functions, it is possible to create your own functions. A function is a block of statements that can be used repeatedly in a program. A function is not executed automatically when a page loads. A function is executed only when it is called.

   PHP Functions - W3Schools

   www.w3schools.com/php/php_functions.asp

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   What is PHP class/object is_a() function?

   • The PHP Class/Object is_a () function is used to find whether an object or class belongs to a certain class or a subclass. It returns true when the object or class is an instance and false otherwise. This function is useful for verifying types in object-oriented programming. Below is the syntax of the PHP Class/Object is_a () function −

   PHP is_a Function - Online Tutorials Library

   www.tutorialspoint.com/php/php_function_is_a.htm

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   Is __invoke a function in PHP?

   • Will be true. Anonymous functions (of the kind that were added in PHP 5.3) are always instances of the Closure class, and every instance of the Closure class is an anonymous function. There's another type of thing in PHP that could arguably be considered a function, and that's objects that implement the __invoke magic method.

   php is_function () to determine if a variable is a function

   stackoverflow.com/questions/2835627/php-is-function-to-determine-if-a-variable-is-a-function

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8. onlinephp.io › is-a › manualis_a - OnlinePHP.io Example

   onlinephp.io › is-a › manual

   Execute is_a Online. Info and examples on is_a PHP Function from Class/Object Information - Variable and Type Related Extensions