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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Get All the Keys of an Array in PHP</title> </head> <body> <pre> <?php // Sample array $persons = array("Harry"=>18, "Clark"=>"32", "John"=>24, "Peter"=>32); // Getting all the keys from the persons array print_r(array_keys($persons)); ?> </pre> </body> </html>
