I want to use the defer attribute for scripts. I understand this can be done using script_loader_tag. However I also want consistent versioning of the files as some plugins do not do it properly.
How do I find scripts' versioning when I use
add_filter( 'script_loader_tag', …
using their handles?
Use the $wp_scripts, which is a global variable to get the version of a registered script.
add_filter( 'script_loader_tag', 'script_handler', 10, 3 );
function script_handler( $tag, $handle, $src ) {
// the following global contains all the information you need
global $wp_scripts;
$ver = $wp_scripts->registered[ $handle ]->ver;
// do your thing
}
Note, this is exemplary.
for each, $handle is a string. script_loader_tag applies to every script separately. This will recover the version the script is registered with, so no. Unless you know exactly where the correct version is saved I see no possibility to retrieve it, because WordPress doesn't know anything about the actual version, it knows just the one given to it when registering the script.
Commented
Dec 25, 2016 at 14:40
get_plugin_data. I assumed you want the version of the script of the javascript file you're loading.
Commented
Dec 25, 2016 at 15:13