使用Form更改PHP变量

我使用此功能通过meta\\u键拉取自定义帖子：

<?php $args = array(
    \'numberposts\'     => 10,
    \'meta_key\'        => \'allvotes\',
    \'orderby\'         => \'meta_value\',
    \'order\'           => \'DESC\',
    \'post_type\'       => \'things\',
    \'post_status\'     => \'publish\' );
$mystuff = get_posts( $args );
?>

我想使用一个表单来编辑我的变量，但当我尝试我的代码时，它不会返回任何帖子。。。

<?php
 $filter = $_POST[\'country\'];
 $submit = $_POST[\'submit\'];
 if(isset($submit)){
    $args = array(
    \'numberposts\'     => 10,
    \'meta_key\'        => \'$filter\',
    \'orderby\'         => \'meta_value\',
    \'order\'           => \'DESC\',
    \'post_type\'       => \'things\',
    \'post_status\'     => \'publish\' );
$mystuff = get_posts( $args );
$name = $filter ;
}
else {
    $args = array(
    \'numberposts\'     => 10,
    \'meta_key\'        => \'canada\',
    \'orderby\'         => \'meta_value\',
    \'order\'           => \'DESC\',
    \'post_type\'       => \'things\',
    \'post_status\'     => \'publish\' );
$mystuff = get_posts( $args );
$name = \'Everywhere\';
};
?>

if(isset($submit)){ $args = array( \'numberposts\' => 10, \'meta_key\' => \'$filter\', \'orderby\' => \'meta_value\', \'order\' => \'DESC\', \'post_type\' => \'things\', \'post_status\' => \'publish\' ); $mystuff = get_posts( $args ); $name = $filter ; }

if(isset($submit)){ $args = array( \'numberposts\' => 10, \'meta_key\' => $filter, \'orderby\' => \'meta_value\', \'order\' => \'DESC\', \'post_type\' => \'things\', \'post_status\' => \'publish\' ); $mystuff = get_posts( $args ); $name = $filter ; }

PHP variables in a post?

我对PHP非常陌生。在Wordpress网站上，我想使用带有Javascript API V3的自定义谷歌地图。一些帖子中会有地图，我想使用PHP变量来确定唯一的位置、缩放级别、信息窗口文本等。Google maps javascript将包含所有样式、地图类型以及地图之间一致的任何内容。因此，对于有地图的帖子，在帖子中写上类似的内容：<?php $location = \"-34.397, 150.644\"; $zoom = \"8\"; ?> &

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PHP variables in a post?