PHP 8 Revealed : Use Attributes, the JIT Compiler, Union Types, and More for Web Development​

Discover the new and updated features of PHP 8, such as the JIT compiler, union types, and attributes, with code examples of each. For each feature, the author includes real-life cases for its use and explains its benefits. What You Will Learn Utilize the new features of PHP 8 and modern development technologies Work with the JIT compiler in PHP 8 Discover PHP 8 using real-life cases Increase your available resources to become more valuable in your development team Who This Book Is For Experienced PHP programmers new to PHP 8. Table of Contents About the Author About the Technical Reviewer Acknowledgments Introduction Chapter 1: JIT Compiler JIT php.ini Settings opcache.jit_buffer_size opcache.jit opcache.jit_debug JIT Debugging Chapter 2: Union Types V2 Type Handling Void and Null Types Redundant Types Variance Adding and Removing Union Types Variance of Individual Union Members Coercive Typing Mode Alternatives Property Types and References Reflection Statistics and Conclusions Chapter 3: Named Arguments Benefits Skipping Defaults Self-Documenting Code Object Initialization Constraints Variadic Functions and Argument Unpacking Function Handling Functions call_user_func() and call_user_func_array() __call() Parameter Name Changes During Inheritance Chapter 4: Reclassifying Engine Warnings, or How I Learned to Stop Worrying and Log the Bugs Chapter 5: Nullsafe Operator Short Circuiting The Benefits Forbidden Uses Writing References Chapter 6: Attributes V2 Attribute Names Resolve to Classes Attribute Fetching Compiler and Userland Attributes Attribute Use Cases Chapter 7: Match Expression v2 Return Values Switch vs. Match No Type Coercion No Fallthrough Exhaustiveness Chapter 8: Mixed Type v2 Chapter 9: Weak Maps Chapter 10: New str_begins_with() and str_ends_with() Chapter 11: Str_contains Chapter 12: Bug Fixes Stricter Type Checks for Arithmetic/Bitwise Operators Change Default PDO Error Mode Treat Namespaced Names as Single Token Saner String to Number Comparisons Ensure Correct Signatures of Magic Methods Allow Trailing Comma in Closure Use Lists Remove Inappropriate Inheritance Signature Checks on Private Methods Saner Numeric Strings The Problem Proposal Make Sorting Stable Chapter 13: Miscellaneous Additions Class Constructor Property Promotion Constraints New fdiv() Function Always Generate Fatal Error for Incompatible Method Signatures Arrays Starting with a Negative Index Implement New DOM Living Standard APIs in ext/dom Implement Static Return Type Variable Syntax Tweaks Interpolated and Noninterpolated Strings Magic, Class, and Regular Constants Class Constant Dereferenceability Arbitrary Expression Support for new and instanceof Add Stringable Interface get_debug_type New preg_last_error_msg() Add CMS Support Allow::class on Objects Object-Based token_get_all() Alternative Validation for Abstract Trait Methods Throw Expression Locale-Independent Float to String Cast Noncapturing Catches Always Available JSON Extension zend.exception_string_param_max_len: Configurable String Length in getTraceAsString() Unbundle ext/xmlrpc Don’t Automatically Unserialize Phar Metadata Outside getMetadata() The Proposal Backward-Incompatible Changes Index