代码片段仓库

import React, { UseState, UseEffect } from 'react';

const Counter = () => {
  const [count, setCount] = UseState(0);
  
  UseEffect(() => {
    const timer = setInterval(() => {
      setCount((c) => c + 1);
    }, 1000);
    
    return () => {
      clearInterval(timer);
    };
  }, []); // Empty dependency array
  
  return (
    <div>
      <h1>Counter: {count}</h1>
    </div>
  );
};

export default Counter;

import { createStore } from 'vuex';

const store = createStore({
  state: {
    count: 0
  },
  mutations: {
    increment(state) {
      state.count++;
    },
    decrement(state) {
      state.count--;
    }
  },
  actions: {
    incrementAsync({commit }) {
      setTimeout(() => {
        commit('increment');
      }, 1000);
    }
  },
  getters: {
    doubleCount(state) {
      return state.count * 2;
    }
  }
});

export default store;

<?php
header('Content-Type: application/json');
echo json_encode(['status' => 'success', 'data' => [1, 2, 3]]);

<?php
setcookie('user_id', '12345', time() + 86400 * 30, '/', '', true, true);

<?php
header('Location: http://example.com');
exit;

<?php
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="download.pdf"');
readfile('document.pdf');