Php 如何使用评论发布表单获取评论ID

我正在寻找一种方法来连接到

comment\u post\u表单

和

update\u comment\u meta

，如果有的话，但我不知道如何获取comment-ID

该函数位于functions.php中

function add_comment_drawing() {

    $drawingsave = $_POST['drawinginput'];
    if ($drawingsave == 'Das Bild wird gespeichert'){
    update_comment_meta(  $comment->ID, 'drawingurl', 'Brad' );
    }


 }
add_action('comment_post', 'add_comment_drawing');

提前感谢

：

评论文章
在数据库中保存注释后立即运行操作函数参数：注释ID、批准状态（“垃圾邮件”，或0/1表示未批准/批准）

:

评论文章
在数据库中保存注释后立即运行操作函数参数：注释ID、批准状态（“垃圾邮件”，或0/1表示未批准/批准）

---

函数中缺少参数

function add_comment_drawing( $comment_id, $approval_status ) {

    $drawingsave = $_POST['drawinginput'];
    if ($drawingsave == 'Das Bild wird gespeichert'){
        update_comment_meta(  $comment_id, 'drawingurl', 'Brad' );
    }
}
add_action( 'comment_post', 'add_comment_drawing', 10, 2 );

---

函数中缺少参数

function add_comment_drawing( $comment_id, $approval_status ) {

    $drawingsave = $_POST['drawinginput'];
    if ($drawingsave == 'Das Bild wird gespeichert'){
        update_comment_meta(  $comment_id, 'drawingurl', 'Brad' );
    }
}
add_action( 'comment_post', 'add_comment_drawing', 10, 2 );

“我不知道如何获取评论ID”

• 添加操作：将操作添加到队列中
• do_action：在执行排队操作的代码中的某个地方（找到它！）

在本例中：/wp包括/comment.php行1811

您可以看到上面大约10行：

$comment_ID = wp_insert_comment($commentdata);
    if ( ! $comment_ID ) {
        return false;
    }

因此，您的注释ID是“添加”操作（在本例中是通过wp_insert_comment方法/函数）提供的，以便您可以在函数中使用它，而不是相反。例如，将注释ID记录到文件或其他内容中

“添加动作/参数是如何工作的？”

打开/wp includes/plugin.php，搜索“add_action”并在第400行附近看到：

**
 * Hooks a function on to a specific action.
 *
 * Actions are the hooks that the WordPress core launches at specific points
 * during execution, or when specific events occur. Plugins can specify that
 * one or more of its PHP functions are executed at these points, using the
 * Action API.
 *
 * @uses add_filter() Adds an action. Parameter list and functionality are the same.
 *
 * @since 1.2.0
 *
 * @param string $tag The name of the action to which the $function_to_add is hooked.
 * @param callback $function_to_add The name of the function you wish to be called.
 * @param int $priority optional. Used to specify the order in which the functions associated with a particular action are executed (default: 10). Lower numbers correspond with earlier execution, and functions with the same priority are executed in the order in which they were added to the action.
 * @param int $accepted_args optional. The number of arguments the function accept (default 1).
 */
function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1) {
    return add_filter($tag, $function_to_add, $priority, $accepted_args);
}

“动作/参数是如何工作的？”

idem.Look-in-wp includes/plugin.php并查看第427行：

/**
 * Execute functions hooked on a specific action hook.
 *
 * This function invokes all functions attached to action hook $tag. It is
 * possible to create new action hooks by simply calling this function,
 * specifying the name of the new hook using the <tt>$tag</tt> parameter.
 *
 * You can pass extra arguments to the hooks, much like you can with
 * apply_filters().
 *
 * @see apply_filters() This function works similar with the exception that
 * nothing is returned and only the functions or methods are called.
 *
 * @since 1.2.0
 *
 * @global array $wp_filter Stores all of the filters
 * @global array $wp_actions Increments the amount of times action was triggered.
 *
 * @param string $tag The name of the action to be executed.
 * @param mixed $arg,... Optional additional arguments which are passed on to the functions hooked to the action.
 * @return null Will return null if $tag does not exist in $wp_filter array
 */
function do_action($tag, $arg = '') {
    global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;

    if ( ! isset($wp_actions[$tag]) )
        $wp_actions[$tag] = 1;
    else
        ++$wp_actions[$tag];

    // Do 'all' actions first
    if ( isset($wp_filter['all']) ) {
        $wp_current_filter[] = $tag;
        $all_args = func_get_args();
        _wp_call_all_hook($all_args);
    }

    if ( !isset($wp_filter[$tag]) ) {
        if ( isset($wp_filter['all']) )
            array_pop($wp_current_filter);
        return;
    }

    if ( !isset($wp_filter['all']) )
        $wp_current_filter[] = $tag;

    $args = array();
    if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this)
        $args[] =& $arg[0];
    else
        $args[] = $arg;
    for ( $a = 2; $a < func_num_args(); $a++ )
        $args[] = func_get_arg($a);

    // Sort
    if ( !isset( $merged_filters[ $tag ] ) ) {
        ksort($wp_filter[$tag]);
        $merged_filters[ $tag ] = true;
    }

    reset( $wp_filter[ $tag ] );

    do {
        foreach ( (array) current($wp_filter[$tag]) as $the_ )
            if ( !is_null($the_['function']) )
                call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));

    } while ( next($wp_filter[$tag]) !== false );

    array_pop($wp_current_filter);
}

/**
*执行挂接在特定操作挂钩上的函数。
*
*此函数调用附加到action hook$tag的所有函数
*只需调用此函数即可创建新的动作挂钩，
*使用$tag参数指定新挂钩的名称。
*
*您可以将额外的参数传递给钩子，就像使用
*应用过滤器（）。
*
*@see apply_filters（）此函数的工作原理与以下类似
*不返回任何内容，只调用函数或方法。
*
*@自1.2.0以来
*
*@global array$wp_filter存储所有过滤器
*@global array$wp_actions递增操作触发的次数。
*
*@param string$标记要执行的操作的名称。
*@param mixed$arg，…可选的附加参数，这些参数传递给连接到操作的函数。
*如果$wp_过滤器数组中不存在$tag，@return null将返回null
*/
函数do_action（$tag，$arg=''）{
全局$wp_filter、$wp_actions、$merged_filters、$wp_current_filter；
如果（！isset（$wp_actions[$tag]））
$wp_actions[$tag]=1；
其他的
++$wp_actions[$tag]；
//先做“所有”动作
如果（isset（$wp_filter['all']））{
$wp_当前_过滤器[]=$tag；
$all_args=func_get_args（）；
_wp_call_all_hook（$all_args）；
}
如果（！isset（$wp_filter[$tag]））{
如果（isset（$wp_filter['all']））
数组_pop（$wp_current_filter）；
返回；
}
如果（！isset（$wp_filter['all']））
$wp_当前_过滤器[]=$tag；
$args=array（）；
if（is_数组（$arg）&&1==count（$arg）&&isset（$arg[0]）&&is_对象（$arg[0]）//数组（&$this）
$args[]=&$arg[0]；
其他的
$args[]=$arg；
对于（$a=2；$a

因此，添加动作/执行动作/过滤器的主要“窍门”是调用用户函数数组（）：，一旦您了解了该函数，您就了解了WP中这些函数的功能

“如何工作”

一般来说，只要看看WordPress的源代码（这就是它的开源优势）

另一个技巧是使用IDE，比如Eclipse或Netbeans：它们可以在IDE中向您显示大量信息，最重要的是：在“运行时”期间，您可以通过调试器获得大量信息。

“我不知道如何获取注释ID”

• 添加操作：将操作添加到队列中
• do_action：在执行排队操作的代码中的某个地方（找到它！）

在本例中：/wp包括/comment.php行1811

您可以看到上面大约10行：

$comment_ID = wp_insert_comment($commentdata);
    if ( ! $comment_ID ) {
        return false;
    }

因此，您的注释ID是“添加”操作（在本例中是通过wp_insert_comment方法/函数）提供的，以便您可以在函数中使用它，而不是相反。例如，将注释ID记录到文件或其他内容中

“添加动作/参数是如何工作的？”

打开/wp includes/plugin.php，搜索“add_action”并在第400行附近看到：

**
 * Hooks a function on to a specific action.
 *
 * Actions are the hooks that the WordPress core launches at specific points
 * during execution, or when specific events occur. Plugins can specify that
 * one or more of its PHP functions are executed at these points, using the
 * Action API.
 *
 * @uses add_filter() Adds an action. Parameter list and functionality are the same.
 *
 * @since 1.2.0
 *
 * @param string $tag The name of the action to which the $function_to_add is hooked.
 * @param callback $function_to_add The name of the function you wish to be called.
 * @param int $priority optional. Used to specify the order in which the functions associated with a particular action are executed (default: 10). Lower numbers correspond with earlier execution, and functions with the same priority are executed in the order in which they were added to the action.
 * @param int $accepted_args optional. The number of arguments the function accept (default 1).
 */
function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1) {
    return add_filter($tag, $function_to_add, $priority, $accepted_args);
}

“动作/参数是如何工作的？”

idem.Look-in-wp includes/plugin.php并查看第427行：

/**
 * Execute functions hooked on a specific action hook.
 *
 * This function invokes all functions attached to action hook $tag. It is
 * possible to create new action hooks by simply calling this function,
 * specifying the name of the new hook using the <tt>$tag</tt> parameter.
 *
 * You can pass extra arguments to the hooks, much like you can with
 * apply_filters().
 *
 * @see apply_filters() This function works similar with the exception that
 * nothing is returned and only the functions or methods are called.
 *
 * @since 1.2.0
 *
 * @global array $wp_filter Stores all of the filters
 * @global array $wp_actions Increments the amount of times action was triggered.
 *
 * @param string $tag The name of the action to be executed.
 * @param mixed $arg,... Optional additional arguments which are passed on to the functions hooked to the action.
 * @return null Will return null if $tag does not exist in $wp_filter array
 */
function do_action($tag, $arg = '') {
    global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;

    if ( ! isset($wp_actions[$tag]) )
        $wp_actions[$tag] = 1;
    else
        ++$wp_actions[$tag];

    // Do 'all' actions first
    if ( isset($wp_filter['all']) ) {
        $wp_current_filter[] = $tag;
        $all_args = func_get_args();
        _wp_call_all_hook($all_args);
    }

    if ( !isset($wp_filter[$tag]) ) {
        if ( isset($wp_filter['all']) )
            array_pop($wp_current_filter);
        return;
    }

    if ( !isset($wp_filter['all']) )
        $wp_current_filter[] = $tag;

    $args = array();
    if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this)
        $args[] =& $arg[0];
    else
        $args[] = $arg;
    for ( $a = 2; $a < func_num_args(); $a++ )
        $args[] = func_get_arg($a);

    // Sort
    if ( !isset( $merged_filters[ $tag ] ) ) {
        ksort($wp_filter[$tag]);
        $merged_filters[ $tag ] = true;
    }

    reset( $wp_filter[ $tag ] );

    do {
        foreach ( (array) current($wp_filter[$tag]) as $the_ )
            if ( !is_null($the_['function']) )
                call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));

    } while ( next($wp_filter[$tag]) !== false );

    array_pop($wp_current_filter);
}

/**
*执行挂接在特定操作挂钩上的函数。
*
*此函数调用附加到action hook$tag的所有函数
*只需调用此函数即可创建新的动作挂钩，
*使用$tag参数指定新挂钩的名称。
*
*您可以将额外的参数传递给钩子，就像使用
*应用过滤器（）。
*
*@see apply_filters（）此函数的工作原理与以下类似
*不返回任何内容，只调用函数或方法。
*
*@自1.2.0以来
*
*