What is the usage of php7 use

php use means that you can use a use in PHP to import classes, functions and constants from the same namespace. The usage statement is "use some\namespace\ClassA; use some\namespace\ClassB;".

PHP 7 use statement

PHP 7 can be used A use imports classes, functions and constants from the same namespace:

Example

// PHP 7 之前版本需要使用多次 use
use some\namespace\ClassA;
use some\namespace\ClassB;
use some\namespace\ClassC as C;
use function some\namespace\fn_a;
use function some\namespace\fn_b;
use function some\namespace\fn_c;
use const some\namespace\ConstA;
use const some\namespace\ConstB;
use const some\namespace\ConstC;
// PHP 7+ 之后版本可以使用一个 use 导入同一个 namespace 的类
use some\namespace\{ClassA, ClassB, ClassC as C};
use function some\namespace\{fn_a, fn_b, fn_c};
use const some\namespace\{ConstA, ConstB, ConstC};
?>

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