WordPress主题错误”致命错误：无法重新分配自动全局变量_POST”

尝试激活它时, 此主题有一个错误, http://www.mafiashare.net/download/sound-rock-music-band-wordpress-theme/

( ! ) SCREAM: Error suppression ignored for
( ! ) Fatal error: Cannot re-assign auto-global variable _POST in C:\wamp\www\web\wp-content\themes\soundrock\functions.php on line 48
Call Stack
#   Time    Memory  Function    Location
1   0.0014  364560  {main}( )   ..\themes.php:0
2   0.0043  433520  require_once( 'C:\wamp\www\web\wp-admin\admin.php' )    ..\themes.php:10
3   0.0048  451648  require_once( 'C:\wamp\www\web\wp-load.php' )   ..\admin.php:30
4   0.0052  463256  require_once( 'C:\wamp\www\web\wp-config.php' ) ..\wp-load.php:29
5   0.0061  553312  require_once( 'C:\wamp\www\web\wp-settings.php' )   ..\wp-config.php:90

所以在第48行的functions.php中, 我删除了这段代码, 然后主题开始工作了, 但是我想为什么它引发错误？

function events_meta_save($_POST, $post_id) {
    global $wpdb;
    if ( empty($_POST["event_social_sharing"]) ) $_POST["event_social_sharing"] = "";
    if ( empty($_POST["event_start_time"]) ) $_POST["event_start_time"] = "";
    if ( empty($_POST["event_end_time"]) ) $_POST["event_end_time"] = "";
    if ( empty($_POST["event_all_day"]) ) $_POST["event_all_day"] = "";
    if ( empty($_POST["event_booking_url"]) ) $_POST["event_booking_url"] = "";
    if ( empty($_POST["event_address"]) ) $_POST["event_address"] = "";
        $sxe = new SimpleXMLElement("<event></event>");
            $sxe->addChild('event_social_sharing', $_POST["event_social_sharing"] );
            $sxe->addChild('event_start_time', $_POST["event_start_time"] );
            $sxe->addChild('event_end_time', $_POST["event_end_time"] );
            $sxe->addChild('event_all_day', $_POST["event_all_day"] );
            $sxe->addChild('event_booking_url', $_POST["event_booking_url"] );
            $sxe->addChild('event_address', $_POST["event_address"] );
                $sxe = save_layout_xml($sxe);
        update_post_meta( $post_id, 'cs_event_meta', $sxe->asXML() );
}

#1

更换

function events_meta_save($_POST, $post_id) {
    global $wpdb;
    if ( empty($_POST["event_social_sharing"]) ) $_POST["event_social_sharing"] = "";
    ....
    ....

与

function events_meta_save($_my_post, $post_id) {
    global $wpdb;
    if ( empty($_my_post["event_social_sharing"]) ) $_POST["event_social_sharing"] = "";
    ....
    ....

不要忘记用$ _my_post或你喜欢的任何其他名称替换条件中的所有$ _POST

原因, 如其他答案中所述：

你不能将$ _POST用作函数/方法参数

。这样做会尝试在符号表中重新分配变量。将此视为语言的已保存关键字。将其置于函数签名中, 就像使用语言的关键字作为变量名来定义新变量一样。

#2

@snjflame, 你不需要将$ _POST用作函数的参数, 因为它是超全局变量。你不能重新定义$ _POST变量；你需要在函数的开头为$ _POST变量定义一个”处理程序”, 并在下面使用它。

例如：

<?php
    function events_meta_save( $post_id ) {
        global $wpdb;
        $post = $_POST;
        if ( empty($post["event_social_sharing"]) ) $post["event_social_sharing"] = "";
        if ( empty($post["event_start_time"]) ) $post["event_start_time"] = "";
        if ( empty($post["event_end_time"]) ) $post["event_end_time"] = "";
        if ( empty($post["event_all_day"]) ) $post["event_all_day"] = "";
        if ( empty($post["event_booking_url"]) ) $post["event_booking_url"] = "";
        if ( empty($post["event_address"]) ) $post["event_address"] = "";
        $sxe = new SimpleXMLElement("<event></event>");
            $sxe->addChild('event_social_sharing', $post["event_social_sharing"] );
            $sxe->addChild('event_start_time', $post["event_start_time"] );
            $sxe->addChild('event_end_time', $post["event_end_time"] );
            $sxe->addChild('event_all_day', $post["event_all_day"] );
            $sxe->addChild('event_booking_url', $post["event_booking_url"] );
            $sxe->addChild('event_address', $post["event_address"] );
        $sxe = save_layout_xml($sxe);
        update_post_meta( $post_id, 'cs_event_meta', $sxe->asXML() );
    }
?>