![]() The mechanism, available for testing since PHP 7.4, is now officially part of PHP 8. Undoubtedly the most anticipated upgrade by the developers is the JIT compiler. There are less than a month left until then, so it’s important to know what to expect. Millions of consumers are looking forward to the official release date: December 3, 2020. The news of PHP 8 has been circulating on the web for a long time. You can always to follow the currently supported versions of the official PHP site. At this time (November 2020), versions 7.2, 7.3 and 7.4 are actively supported, with version 7.2 addressing only critical security issues, and version 7.3 set to enter the same phase on 6 December 2020. In the meantime, the next version is usually out. When they expire, there is another year or two of security support, and updates are released only in case of critical problems. One version of PHP has been actively maintained for about two years. Among the main innovations are the JIT compiler, union types, additional attributes. ![]() This way, callers like g and g's clients have many options, and furthermore, callers always know how to omit arguments so they can omit one in the middle of the parameter list.The new version of the popular programming language PHP 8, is now released (November 26, 2020), bringing with it many new features and performance improvements. The best approach, it seems to me, is to always use a sentinel like null as the default value of an optional argument. Suppose you want to call the function f many times from function g, allowing the caller of g to specify if f should be called with a specific value or with its default value: ![]() The utility of the optional argument feature is thus somewhat diminished. In function calls, PHP clearly distinguishes between missing arguments and present but empty arguments. To experiment on performance of pass-by-reference and pass-by-value, I used this script. ![]() Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search ![]()
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