PHP has a vast set of built-in functions that every developer should know to write efficient and secure code. Here are some essential ones: 1. String Functions strlen($string): Returns the length of a string. strpos($haystack, $needle): Finds the position of the first occurrence of a substring. str_replace($search, $replace, $subject): Replaces occurrences of a string within another...

This document pertains to HP and Compaq computers that came with Windows 10 installed.Learn how to reinstall or restore an HP computer with Windows 10 to an earlier state. Also, learn how to perform a system recovery using HP Recovery Manager. CAUTION:The new Recovery Manager for Fall Update 2015 must be downloaded and installed to successfully perform a system recovery using HP...