If the internal pointer points beyond the end of the elements list or the array is empty, key () returns null. snakeme 33 1 6 1 ArrayAccess interface for your objects. It loops over the array, and each value for the current array element is assigned to $value, and the array pointer is advanced by one to go the next element in the array. The key () function simply returns the key of the array element that's currently being pointed to by the internal pointer. The foreach loop is mainly used for looping through the values of an array. PHP-8.2.1 was throwing errors seemingly uncaught (they were eventually seen amassing in / var / log / apache / DOMAIN-ssl-err.log ) due to mismatch between return types of the necessary interface methods in our 'implements \Iterator' class (which had worked fine for many years, until our leap up to 8.2.1) versus the interface methods required. PHP Overview PHP Tutorial PHP Introduction PHP Installation PHP Basics PHP Basics PHP Syntax PHP Data Types PHP Variables PHP Constants PHP Print and Echo Statements Operators PHP Operators PHP Arithmetic Operators PHP Assignment Operators PHP Comparison Operators PHP Logical Operators PHP Ternary Operator PHP Concatenation Operators Decision Control Structures PHP Decision Making PHP if else statement PHP elseif statement PHP switch statement Loop Control Structures PHP Looping PHP while loop PHP do-while PHP for loop PHP foreach loop Functions PHP Date and Time PHP Functions PHP String Handling Functions PHP Include and Require PHP Headers PHP File Handling PHP Cookies PHP Sessions PHP Sending Emails Compare Strings In PHP array_diff() Function in PHP array_merge() Function in PHP array_search() Function in PHP eval() in PHP preg_replace() Function in PHP URL Encoding and Decoding with PHP sleep() Function in PHP strlen() Function in PHP ksort() Function in PHP strlen() Function in PHP gettype() Function in PHP Forms PHP GET and POST PHP Server Side Form Validation PHP File Upload PHP Classes and Objects PHP OOP Terminology PHP Access Modifiers What is stdClass in PHP? PHP Inheritance PHP OOP Traits PHP Abstract Classes PHP Constructor PHP Destructor Miscellaneous PHP Arrays PHP RSS Feed PHP Composer Environment Variables in PHP PHP Error Handling
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