get_post()(获取一篇文章)
get_post() 函数可以根据 ID 查询一篇文章的信息,还能返回循环中的当前文章。
用法
get_post( $post, $output, $filter );
参数
$id
(整数 | 对象)(可选)文章 ID 或者文章对象,如果为空则自动设置成当前文章。
默认值:null(当前文章)
$output
(字符串)(可选)返回结果的形式,可选:
- OBJECT:返回一个文章对象
- ARRAY_A:返回带键值的数组
- ARRAY_N:返回不带键值的数组
- 默认值:OBJECT
$filter
(字符串)(可选)文章信息过滤方法。具体参考 sanitize_post_field() 函数。
默认值:row
返回值
(对象 | null | 数组)返回文章对象、数组或 null.
例子
获取 ID 为 7 的文章并打印输出它的标题:
$post_7 = get_post( 7 ); $title = $post_7->post_title;
获取 ID 为 7 的文章(数组形式)并打印输出它的标题:
$post_7 = get_post( 7, ARRAY_A ); $title = $post_7['post_title'];
其它
此函数位于:wp-includes/post.php 和 wp-includes/class-wp-atom-server.php
获取分类链接
在 WordPress 开发中,经常需要获取分类的链接。
知道分类 ID 的话只需要使用 get_category_link() 函数即可直接获取到。
但在实际情况中可能只知道一点分类信息,下边我介绍一下通过各种分类信息获取分类链接的方法。
根据分类 ID 获取分类链接
根据 ID 获取分类链接比较简单,直接使用 get_category_link() 函数即可。
echo get_category_link( 23 );
根据分类别名获取分类链接需要多一个步奏,先用 get_category_by_slug() 函数根据别名获取到分类,然后再获取分类链接。
echo get_category_link( get_category_by_slug( 'tips' ) );
根据分类名获取分类链接
根据分类名获取分类链接和根据分类别名获取原理类似,都是先获取到分类,再获取链接。
echo get_category_link( get_cat_ID( 'WordPress 教程' ) );

Calculating the total number of elements in a PHP multidimensional array can be done using recursive or iterative methods. 1. The recursive method counts by traversing the array and recursively processing nested arrays. 2. The iterative method uses the stack to simulate recursion to avoid depth problems. 3. The array_walk_recursive function can also be implemented, but it requires manual counting.

In PHP, the characteristic of a do-while loop is to ensure that the loop body is executed at least once, and then decide whether to continue the loop based on the conditions. 1) It executes the loop body before conditional checking, suitable for scenarios where operations need to be performed at least once, such as user input verification and menu systems. 2) However, the syntax of the do-while loop can cause confusion among newbies and may add unnecessary performance overhead.

Efficient hashing strings in PHP can use the following methods: 1. Use the md5 function for fast hashing, but is not suitable for password storage. 2. Use the sha256 function to improve security. 3. Use the password_hash function to process passwords to provide the highest security and convenience.

Implementing an array sliding window in PHP can be done by functions slideWindow and slideWindowAverage. 1. Use the slideWindow function to split an array into a fixed-size subarray. 2. Use the slideWindowAverage function to calculate the average value in each window. 3. For real-time data streams, asynchronous processing and outlier detection can be used using ReactPHP.

The __clone method in PHP is used to perform custom operations when object cloning. When cloning an object using the clone keyword, if the object has a __clone method, the method will be automatically called, allowing customized processing during the cloning process, such as resetting the reference type attribute to ensure the independence of the cloned object.

In PHP, goto statements are used to unconditionally jump to specific tags in the program. 1) It can simplify the processing of complex nested loops or conditional statements, but 2) Using goto may make the code difficult to understand and maintain, and 3) It is recommended to give priority to the use of structured control statements. Overall, goto should be used with caution and best practices are followed to ensure the readability and maintainability of the code.

In PHP, data statistics can be achieved by using built-in functions, custom functions, and third-party libraries. 1) Use built-in functions such as array_sum() and count() to perform basic statistics. 2) Write custom functions to calculate complex statistics such as medians. 3) Use the PHP-ML library to perform advanced statistical analysis. Through these methods, data statistics can be performed efficiently.

Yes, anonymous functions in PHP refer to functions without names. They can be passed as parameters to other functions and as return values of functions, making the code more flexible and efficient. When using anonymous functions, you need to pay attention to scope and performance issues.


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