What's different in PHP 7/8 from the previous versions?

 PHP 7 and 8 introduced several significant changes and improvements over previous versions of PHP. Here are some of the key differences:

  1. Improved Performance: PHP 7 introduced significant performance improvements over previous versions, resulting in faster execution of PHP scripts. PHP 8 continued to improve performance by introducing JIT (Just-In-Time) compilation.

  2. Null Coalescing Operator: PHP 7 introduced the null coalescing operator ??, which provides a shorthand way of checking if a variable is null and providing a default value if it is.

  3. Spaceship Operator: PHP 7 introduced the spaceship operator <=>, which allows for easy comparison of two values and returns -1, 0, or 1 depending on whether the first value is less than, equal to, or greater than the second value.

  4. Type Declarations: PHP 7 introduced support for type declarations, allowing developers to specify the data type of function parameters and return values. This helps to improve code quality and reduce errors.

  5. Return Type Declarations: PHP 7 also introduced support for return type declarations, allowing developers to specify the data type that a function will return. This helps to improve code quality and reduce errors.

  6. Attributes: PHP 8 introduced support for attributes, which allow developers to add metadata to classes, methods, and properties. This can be used for things like debugging, documentation, and code generation.

  7. Named Arguments: PHP 8 introduced support for named arguments, allowing developers to specify function arguments by name rather than by position. This can make function calls more readable and reduce errors.

  8. Union Types: PHP 8 introduced support for union types, allowing developers to specify that a variable or function parameter can be of one of several possible types.

Overall, PHP 7 and 8 introduced many important improvements and new features that have made PHP more powerful, efficient, and enjoyable to work with for developers.

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