WordPress没有“最终输出”过滤器。

只需谷歌搜索，我就从堆栈溢出中找到了一个有趣的答案。

所有学分转到@kfriend

更多详细信息（SO问题链接）：Wordpress filter to modify final html output

<?php

/**
 * Output Buffering
 *
 * Buffers the entire WP process, capturing the final output for manipulation.
 */

ob_start();

add_action(\'shutdown\', function() {
    $final = \'\';

    // We\'ll need to get the number of ob levels we\'re in, so that we can iterate over each, collecting
    // that buffer\'s output into the final output.
    $levels = ob_get_level();

    for ($i = 0; $i < $levels; $i++)
    {
        $final .= ob_get_clean();
    }

    // Apply any filters to the final output
    echo apply_filters(\'final_output\', $final);
}, 0);

<?php
add_filter(\'final_output\', function($output) {
    return str_replace(\'foo\', \'bar\', $output);
});
?>