What is the argument to pass to switch theme, when I have the result of wp_get_themes()?

 $args = array(
        'allowed' => true

 $themes = wp_get_themes(  );

 foreach ($themes as $theme) {

          $argument_to_pass_to_switch_theme = ??????

  • Why are you switching themes in a Loop? What is the use case for this? – s_ha_dum May 4 '14 at 15:43
  • I'm not, I just need the variable to echo it later... – user1049961 May 4 '14 at 15:58
  • For temporary preview/theme switch (while visitor still see the default theme), then you can use plugins: wordpress.stackexchange.com/a/161196/42702 – T.Todua Sep 13 '14 at 8:46

If I understand your question, you should use this inside your foreach:

$argument_to_pass_to_switch_theme = $theme->get_stylesheet();

Just taking a look at the documentation:

The function wp_get_themes()...

"...returns an array of WP_Theme objects based on the argument."

This class WP_Theme has a method get_stylesheet(), which...

"...returns a string with the directory name of the theme's "stylesheet" files, inside the theme root. If this is a child theme it is the directory from the child theme. "

And the function switch_theme()...

"...accepts one argument: $stylesheet of the theme. ($stylesheet is the name of your folder slug."


wp_get_themes() returns a WP_Theme object, one of the methods of which, get_stylesheet() will return the value you need to pass to switch_theme()

You are not likely to get "the variable" to echo later. If you have more than one theme and is nearly always the case (as you should keep a bundled theme just in case) you are going to have multiple variables, so you need to create an array and not a string.

$themes = wp_get_themes();
foreach ($themes as $theme) {
  $argument_to_pass_to_switch_theme[] =  $theme->get_stylesheet();


If you run the code as you have it mocked up...

$themes = wp_get_themes();
foreach ($themes as $theme) {
  $argument_to_pass_to_switch_theme =  $theme->get_stylesheet();


... you will overwrite the $argument_to_pass_to_switch_theme variable at every iteration of the loop and only end up with the stylesheet name for the last theme in the loop.

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