WordPress wp_head - 如何将新的脚本文件添加到顶部？

Question

如何将脚本文件添加到 wp_head 的最顶部？

根据本指南，使用下面的代码将始终将我的新脚本文件添加到最底部:

add_action('wp_head','hook_javascript');

function hook_javascript() {

    $output="<script> alert('Page is loading...'); </script>";

    echo $output;
}

有什么想法可以将我的新脚本文件移动到顶部吗？

Answer 1

使用 add_action() 的 $priority 参数功能。

add_action( string $tag, callable $function_to_add, int $priority = 10, int $accepted_args = 1 )

$priority
(int) (Optional) Used to specify the order in which the functions associated with a particular action are executed. 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.
Default value: 10

因此，选择一个非常低的数字，只要没有其他插件/主题使用更低的数字，您的行就会添加到顶部。

add_action('wp_head','hook_javascript', -1000);