How to implement data search and filtering through PHP and UniApp

How to implement data search and filtering through PHP and UniApp

Overview:
When developing mobile applications, it is often necessary to search and filter data. This article will introduce how to use PHP and UniApp framework to implement data search and filtering functions. We will start by writing PHP code on the server side, and then call these interfaces through UniApp to implement data search and filtering.

1. Writing PHP code on the server side
   First, write a PHP file on the server side to handle data search and filtering requests. The following is a sample code:

<?php
// 假设我们有一个名为data的数组，它存储了我们要搜索和筛选的数据
$data = [
    ['id' => 1, 'name' => '张三', 'age' => 20, 'gender' => '男'],
    ['id' => 2, 'name' => '李四', 'age' => 25, 'gender' => '女'],
    ['id' => 3, 'name' => '王五', 'age' => 30, 'gender' => '男'],
    // 这里可以继续添加更多的数据
];

// 处理搜索和筛选请求
if (isset($_GET['keyword'])) {
    $keyword = $_GET['keyword'];
    $result = array_filter($data, function($item) use ($keyword) {
        return strpos($item['name'], $keyword) !== false;
    });
    echo json_encode($result);
} else {
    echo json_encode($data);
}
?>

In the above code, we obtain the search keyword through $_GET['keyword'] and use the array_filter() function to filter the data. If the keyword is empty, all data will be returned, otherwise only data matching the keyword will be returned.

2. UniApp side code writing
   Next, call the PHP interface in the UniApp front-end code to implement data search and filtering. The following is a simple example:

<template>
  <div class="container">
    <input type="text" v-model="keyword" @input="search">
    <ul>
      <li v-for="item in items" :key="item.id">
        {{item.name}}
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      keyword: '',
      items: []
    }
  },
  methods: {
    search() {
      uni.request({
        url: 'http://yourdomain.com/search.php',
        data: {
          keyword: this.keyword
        },
        success: (res) => {
          this.items = res.data;
        }
      });
    }
  }
}
</script>

In the above code, we obtain the keywords entered by the user through an input box, and call the search() method to initiate a search when the content of the input box changes. ask. In the search() method, we use the uni.request() method to call the server-side PHP interface and pass the keyword as a parameter to the backend.

When the request returns successfully, we assign the data obtained from the server to the items array and render it on the front-end page. In this way, the data search and filtering functions are realized.

Summary:
Through the combination of PHP and UniApp, we can easily implement data search and filtering functions. You only need to write the corresponding PHP interfaces on the server side, and then call these interfaces in UniApp. In this way, we can not only search and filter on the front end, but also use the computing power of the server to speed up processing, and better manage and maintain data. I hope this article will help you understand how to implement data search and filtering through PHP and UniApp.

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