函数惰性加载

Testing Is Documentation

tests/Kernel/FnTest.php函数惰性加载 - 图1

使用函数惰性加载可以更好地管理辅助方法，避免载入过多无用的辅助函数，并且可以提高性能。

func 是一个全局函数随着 kernel 包自动加载，可以在业务中随时使用，组件开发中请使用原生 class_exists 导入函数。

Uses

  1. <?php
  3. use Error;
  4. use Exception;

分组函数

  1. public function testGroup(): void
  2. {
  3.     $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn1'));
  4.     $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn2'));
  6.     $result = func(fn () => testgroup_fn1());
  7.     $this->assertSame('hello world', $result);
  8.     $result = func(fn () => testgroup_fn2());
  9.     $this->assertSame('hello world2', $result);
  11.     $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn1'));
  12.     $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn2'));
  13. }

单个函数

  1. public function testSingleFn(): void
  2. {
  3.     $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\single_fn'));
  5.     $result = func(fn () => single_fn());
  6.     $this->assertSame('hello single fn', $result);
  8.     $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\single_fn'));
  9. }

目录索引函数

  1. public function testIndex(): void
  2. {
  3.     $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\foo_bar'));
  5.     $result = func(fn () => foo_bar());
  6.     $this->assertSame('foo bar', $result);
  7.     $result = func(fn () => foo_bar(' haha'));
  8.     $this->assertSame('foo bar haha', $result);
  9.     $result = func(fn (string $extend = '') => foo_bar($extend), ' haha');
  10.     $result = func(function (string $extend = '') {
  11.         return foo_bar($extend);
  12.     }, ' haha');
  13.     $this->assertSame('foo bar haha', $result);
  15.     $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\foo_bar'));
  16. }