[+]: fix css-inline with "@charset" | thx @mdio

-> https://github.com/mdio/CssToInlineStyles/commit/448a1df7a9eff96b847cfc144549211f731863a1

src/CssToInlineStyles.php

@@ -19,6 +19,14 @@ class CssToInlineStyles
    */
   private static $cssMediaQueriesRegEx = '#@media\\s+(?:only\\s)?(?:[\\s{\\(]|screen|all)\\s?[^{]+{.*}\\s*}\\s*#misU';
 
+  /**
+   * regular expression: css charset
+   *
+   * @var string
+   */
+  private static $cssCharsetRegEx = '/@charset [\'"][^\'"]+[\'"];/i';
+
+
   /**
    * regular expression: conditional inline style tags
    *
@@ -103,6 +111,13 @@ class CssToInlineStyles
    */
   private $excludeMediaQueries = true;
 
+  /**
+   * Exclude media queries from "$this->css" and keep media queries for inline-styles blocks
+   *
+   * @var bool
+   */
+  private $excludeCssCharset = true;
+
   /**
    * Creates an instance, you could set the HTML and CSS here, or load it
    * later.
@@ -375,6 +390,11 @@ private function doCleanup($css)
     // remove spaces
     $css = preg_replace('/\s\s+/', ' ', $css);
 
+    // remove css charset
+    if (true === $this->excludeCssCharset) {
+      $css = $this->stripeCharsetInCss($css);
+    }
+
     // remove css media queries
     if (true === $this->excludeMediaQueries) {
       $css = $this->stripeMediaQueries($css);
@@ -398,6 +418,18 @@ private function stripeMediaQueries($css)
     return (string)preg_replace(self::$cssMediaQueriesRegEx, '', $css);
   }
 
+  /**
+   * remove charset from the string
+   *
+   * @param $css
+   *
+   * @return string
+   */
+  private function stripeCharsetInCss($css)
+  {
+    return (string)preg_replace(self::$cssCharsetRegEx, '', $css);
+  }
+
   /**
    * Process the CSS-properties
    *
@@ -836,6 +868,16 @@ public function setExcludeMediaQueries($on = true)
     $this->excludeMediaQueries = (bool)$on;
   }
 
+  /**
+   * Set exclude charset
+   *
+   * @param bool $on
+   */
+  public function setExcludeCssCharset($on = true)
+  {
+    $this->excludeCssCharset = (bool)$on;
+  }
+
   /**
    * Set exclude conditional inline-style blocks e.g.: <!--[if gte mso 9]><style>.foo { bar } </style><![endif]-->
    *

tests/CssToInlineStylesTest.php

@@ -188,6 +188,7 @@ public function testKeepMediaQuery()
     $cssToInlineStyles->setUseInlineStylesBlock(true);
     $cssToInlineStyles->setStripOriginalStyleTags(true);
     $cssToInlineStyles->setExcludeMediaQueries(true);
+    $cssToInlineStyles->setExcludeCssCharset(true);
     $cssToInlineStyles->setHTML($html);
     $cssToInlineStyles->setCSS($css);
     $actual = $cssToInlineStyles->convert();

tests/test2Css.css

@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 @media only screen and (max-width: 599px) {
   table.body {
     position: relative;