我不确定是否在页面中正确“插入”了脚本。

具体示例：我需要使用google API生成一个地图，并决定编写一个插件来实现这一点。现在的问题是如何正确处理插入临时票据。

第一次尝试，我的插件文件使用add_shortcode 附加一个只返回<script type=\\"text/javascript\\" src=\\"... 在页面/帖子的中间。这是可行的，但我知道最好将脚本放在hearder/footer中，我应该只在需要时将它们排队。

这是我的第二次尝试：

<?php 
if ( ! defined( \'ABSPATH\' ) ) exit;

add_action( \'wp_enqueue_scripts\', \'my_enqueue_scripts\' );
add_shortcode( \'mymapshortcode\', \'do_mymapshortcode\');

function my_enqueue_scripts() {
    // enqueue scripts if main query is for a page or post that has the shortcode
    if ( isset($GLOBALS[\'wp_the_query\']) 
        && is_a($GLOBALS[\'wp_the_query\']->get_queried_object(),\'WP_Post\')
        && has_shortcode($GLOBALS[\'wp_the_query\']->get_queried_object()->post_content, \'mymapshortcode\') ){

        $target=plugin_dir_url( __FILE__ ) . \'mymapshortcode.js\';
        wp_enqueue_script(\'gmapscript\',\'http://maps.google.com/maps/api/js?sensor=false\');
        wp_enqueue_script(\'mygmapscript\',$target,false,null,false);
    }
}

function do_mymapshortcode() {
    // retrun a div for the map to be written
    return "<div id=\\"themap\\" style=\\"width:500px; height:500px;\\">
        <p>Loading map...</p><noscript><p>Cannot show map because js is disabled</p></noscript>
        </div>";
}
?>

然后，如果我决定内联我的脚本（太小了，不值得从单独的文件中获取它的开销），我会这样做：

<?php 
if ( ! defined( \'ABSPATH\' ) ) exit;

add_action( \'wp_enqueue_scripts\', \'my_enqueue_scripts2\' );
add_action( \'wp_head\', \'my_wp_head2\' );
add_shortcode( \'mymapshortcode2\', \'do_mymapshortcode2\');

function my_wp_head2() {
    // echo inline script if main query is for a page or post that has the shortcode
    if ( isset($GLOBALS[\'wp_the_query\']) 
        && is_a($GLOBALS[\'wp_the_query\']->get_queried_object(),\'WP_Post\')
        && has_shortcode($GLOBALS[\'wp_the_query\']->get_queried_object()->post_content, \'mymapshortcode2\') ){

        $output= <<<\'EOT\'
<script>/* my min js goes here */ </script>
EOT;
    echo $output;
    }
}

function my_enqueue_scripts2() {
    // enqueue script if main query is for a page or post that has the shortcode
    if ( isset($GLOBALS[\'wp_the_query\']) 
        && is_a($GLOBALS[\'wp_the_query\']->get_queried_object(),\'WP_Post\')
        && has_shortcode($GLOBALS[\'wp_the_query\']->get_queried_object()->post_content, \'mymapshortcode2\') ){

        wp_enqueue_script(\'gmapscript2\',\'http://maps.google.com/maps/api/js?sensor=false\');
    }
}

function do_mymapshortcode2() {
    // retrun a div for the map to be written
    return "<div id=\\"themap\\" style=\\"width:500px; height:500px;\\">
        <p>Loading map...<noscript><p>Cannot show map because js is disabled</noscript></p>
        </div>";
}
?>

Is it how it is supposed to be done or am I doing it wrong?

此外，是否可以/更好地移动测试has_shortcode 将add_action 所以它只测试一次，如下所示：

if ( isset($GLOBALS[\'wp_the_query\']) 
        && is_a($GLOBALS[\'wp_the_query\']->get_queried_object(),\'WP_Post\')
        && has_shortcode($GLOBALS[\'wp_the_query\']->get_queried_object()->post_content, \'mymapshortcode\') ){
    add_action( \'wp_enqueue_scripts\', \'my_enqueue_scripts2\' );
    add_action( \'wp_head\', \'my_wp_head2\' );
}

<?php 
if ( ! defined( \'ABSPATH\' ) ) exit;

add_shortcode( \'mymapshortcode2\', \'do_mymapshortcode2\');

function do_mymapshortcode2() {

    if (    !isset($GLOBALS[\'wp_the_query\']) 
         || !is_a($GLOBALS[\'wp_the_query\']->get_queried_object(),\'WP_Post\')
    )
        return \'\';

    // Enqueue your custom scripts here
    wp_enqueue_script( \'gmapscript2\', \'http://maps.google.com/maps/api/js?sensor=false\' );

    // return a div for the map to be written
    return "<script>/* my min js goes here */ </script>
        <div id=\\"themap\\" style=\\"width:500px; height:500px;\\">
        <p>Loading map...<noscript><p>Cannot show map because js is disabled</noscript></p>
        </div>";
}
?>