Search Results

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

   www.php.net › manual › en

   Return Values ¶ The key () function simply returns the key of the array element that's currently being pointed to by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list or the array is empty, key () returns null.

2. www.w3schools.com › Php › func_array_keyPHP key () Function - W3Schools

   www.w3schools.com › Php › func_array_key

   Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

3. www.tutorialrepublic.com › php-reference › php-keyPHP key () Function - Tutorial Republic

   www.tutorialrepublic.com › php-reference › php-key

   • Description
   • Syntax
   • More Examples

   The key()function fetch the key or index of the current element in an array. The following table summarizes the technical details of this function.

   See full list on tutorialrepublic.com

   The basic syntax of the key()function is given with: The following example shows the key()function in action.

   See full list on tutorialrepublic.com

   Here're some more examples showing how key()function actually works: You can also use this function with indexed array to fetch index of current element. The key()function is commonly used along with the following functions: 1. current()– Returns the value of the current element in an array. 2. next()– Moves the internal pointer of an array to the ...

   See full list on tutorialrepublic.com

   • Version: PHP 4+

4. www.geeksforgeeks.org › php › php-key-functionPHP key () Function - GeeksforGeeks

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

   Jun 20, 2023 · The key () function is an inbuilt function in PHP which is used to return the index of the element of a given array to which the internal pointer is currently pointing.

5. zetcode.com › php-array › keyPHP key - Array Key Function in PHP - ZetCode

   zetcode.com › php-array › key

   PHP key function tutorial shows how to get the key of the current array element in PHP. Learn key () with practical examples.

6. www.tutorialspoint.com › php › php_function_keyPHP - Function key () - Online Tutorials Library

   www.tutorialspoint.com › php › php_function_key

   The key() function returns the element key from the current internal pointer position. This function returns FALSE on error= otherwise key. Try out following example − This will produce the following result −

7. People also ask

   What is a key function in PHP?

   • The PHP key function fetches the key of the current array element. It's part of PHP's array pointer functions, working with the internal pointer. The key function returns the key of the element currently pointed to by the internal array pointer. It doesn't advance the pointer. Syntax: key(array $array): mixed.

   PHP key - Array Key Function in PHP - ZetCode

   zetcode.com/php-array/key/

   See all results for this question

   What is a key() function in JavaScript?

   • The key() function fetch the key or index of the current element in an array. The following table summarizes the technical details of this function. Returns the key of the current element in an array. Returns NULL if the array is empty or array's internal pointer points beyond the end of the elements list.

   PHP key () Function - Tutorial Republic

   www.tutorialrepublic.com/php-reference/php-key-function.php

   See all results for this question

   What is array_key_exists function in PHP?

   • array (Required) It specifies an array This function returns FALSE on error= otherwise key. Try out following example − This will produce the following result − Learn about the PHP array_key_exists function, its syntax, usage, and examples to check if a key exists in an array.

   PHP array_key_exists Function - Online Tutorials Library

   www.tutorialspoint.com/php/php_function_key.htm

   See all results for this question

   What does array return in PHP?

   • Returns the key of the current element in an array. Returns NULL if the array is empty or array's internal pointer points beyond the end of the elements list. Since PHP 7.0.0, array is always passed by value to this function. Prior to this version, it was passed by reference if possible, and by value otherwise.

   PHP key () Function - Tutorial Republic

   www.tutorialrepublic.com/php-reference/php-key-function.php

   See all results for this question

8. www.analyste-programmeur.com › fonction-keyFonction key () - analyste-programmeur.com

   www.analyste-programmeur.com › fonction-key

   La fonction key retourne l’indice ou la clé de la position courante. Utilisation de la fonction key () La signature de la fonction key est la suivante : key ( $array ); /* Déclaration du tableau */ $array = array ( 'langage' => 'php', 'cours' => 'fonction', 'nom' => 'key' ); echo key ($array); /* affiche : langage */ next ($array);