<?php
add_action( 'wp_enqueue_scripts', 'enqueue_my_styles' );
/**
* Example callback function that demonstrates how to properly enqueue conditional stylesheets in WordPress for IE.
* IE10 and up does not support conditional comments in standards mode.
*
* @uses wp_style_add_data() WordPress function to add the conditional data.
* @link https://developer.wordpress.org/reference/functions/wp_style_add_data/
* @link https://msdn.microsoft.com/en-us/library/ms537512(v=vs.85).aspx
*/
function enqueue_my_styles() {
// Load the main stylesheet
wp_enqueue_style( 'my-theme', get_stylesheet_uri() );
/**
* Load our IE-only stylesheet for all versions of IE:
* <!--[if IE]> ... <![endif]-->
*/
wp_enqueue_style( 'my-theme-ie', get_stylesheet_directory_uri() . "/css/ie.css", array( 'my-theme' ) );
wp_style_add_data( 'my-theme-ie', 'conditional', 'IE' );
/**
* Load our IE version-specific stylesheet:
* <!--[if IE 7]> ... <![endif]-->
*/
wp_enqueue_style( 'my-theme-ie7', get_stylesheet_directory_uri() . "/css/ie7.css", array( 'my-theme' ) );
wp_style_add_data( 'my-theme-ie7', 'conditional', 'IE 7' );
/**
* Load our IE specific stylesheet for a range of older versions:
* <!--[if lt IE 9]> ... <![endif]-->
* <!--[if lte IE 8]> ... <![endif]-->
* NOTE: You can use the 'less than' or the 'less than or equal to' syntax here interchangeably.
*/
wp_enqueue_style( 'my-theme-old-ie', get_stylesheet_directory_uri() . "/css/old-ie.css", array( 'my-theme' ) );
wp_style_add_data( 'my-theme-old-ie', 'conditional', 'lt IE 9' );
/**
* Load our IE specific stylesheet for a range of newer versions:
* <!--[if gt IE 8]> ... <![endif]-->
* <!--[if gte IE 9]> ... <![endif]-->
* NOTE: You can use the 'greater than' or the 'greater than or equal to' syntax here interchangeably.
*/
wp_enqueue_style( 'my-theme-new-ie', get_stylesheet_directory_uri() . "/css/new-ie.css", array( 'my-theme' ) );
wp_style_add_data( 'my-theme-ie', 'conditional', 'gt IE 8' );
}