Replace deprecated string interpolation usage

src/voku/helper/SimpleHtmlDom.php

@@ -505,7 +505,7 @@ public function firstChild()
      */
     public function getElementByClass(string $class): SimpleHtmlDomNodeInterface
     {
-        return $this->findMulti(".${class}");
+        return $this->findMulti(".{$class}");
     }
 
     /**
@@ -517,7 +517,7 @@ public function getElementByClass(string $class): SimpleHtmlDomNodeInterface
      */
     public function getElementById(string $id): SimpleHtmlDomInterface
     {
-        return $this->findOne("#${id}");
+        return $this->findOne("#{$id}");
     }
 
     /**
@@ -552,7 +552,7 @@ public function getElementByTagName(string $name): SimpleHtmlDomInterface
      */
     public function getElementsById(string $id, $idx = null)
     {
-        return $this->find("#${id}", $idx);
+        return $this->find("#{$id}", $idx);
     }
 
     /**

src/voku/helper/SimpleXmlDom.php

@@ -455,7 +455,7 @@ public function firstChild()
      */
     public function getElementByClass(string $class): SimpleXmlDomNodeInterface
     {
-        return $this->findMulti(".${class}");
+        return $this->findMulti(".{$class}");
     }
 
     /**
@@ -467,7 +467,7 @@ public function getElementByClass(string $class): SimpleXmlDomNodeInterface
      */
     public function getElementById(string $id): SimpleXmlDomInterface
     {
-        return $this->findOne("#${id}");
+        return $this->findOne("#{$id}");
     }
 
     /**
@@ -502,7 +502,7 @@ public function getElementByTagName(string $name): SimpleXmlDomInterface
      */
     public function getElementsById(string $id, $idx = null)
     {
-        return $this->find("#${id}", $idx);
+        return $this->find("#{$id}", $idx);
     }
 
     /**

src/voku/helper/XmlDomParser.php

@@ -389,7 +389,7 @@ public function fixHtmlOutput(
      */
     public function getElementByClass(string $class): SimpleXmlDomNodeInterface
     {
-        return $this->findMulti(".${class}");
+        return $this->findMulti(".{$class}");
     }
 
     /**
@@ -401,7 +401,7 @@ public function getElementByClass(string $class): SimpleXmlDomNodeInterface
      */
     public function getElementById(string $id): SimpleXmlDomInterface
     {
-        return $this->findOne("#${id}");
+        return $this->findOne("#{$id}");
     }
 
     /**
@@ -432,7 +432,7 @@ public function getElementByTagName(string $name): SimpleXmlDomInterface
      */
     public function getElementsById(string $id, $idx = null)
     {
-        return $this->find("#${id}", $idx);
+        return $this->find("#{$id}", $idx);
     }
 
     /**
@@ -526,7 +526,7 @@ public function loadHtmlFile(string $filePath, $libXMLExtraOptions = null): DomP
             &&
             !\file_exists($filePath)
         ) {
-            throw new \RuntimeException("File ${filePath} not found");
+            throw new \RuntimeException("File {$filePath} not found");
         }
 
         try {
@@ -536,11 +536,11 @@ public function loadHtmlFile(string $filePath, $libXMLExtraOptions = null): DomP
                 $html = \file_get_contents($filePath);
             }
         } catch (\Exception $e) {
-            throw new \RuntimeException("Could not load file ${filePath}");
+            throw new \RuntimeException("Could not load file {$filePath}");
         }
 
         if ($html === false) {
-            throw new \RuntimeException("Could not load file ${filePath}");
+            throw new \RuntimeException("Could not load file {$filePath}");
         }
 
         return $this->loadHtml($html, $libXMLExtraOptions);
@@ -603,7 +603,7 @@ public function loadXmlFile(string $filePath, $libXMLExtraOptions = null): self
             &&
             !\file_exists($filePath)
         ) {
-            throw new \RuntimeException("File ${filePath} not found");
+            throw new \RuntimeException("File {$filePath} not found");
         }
 
         try {
@@ -613,11 +613,11 @@ public function loadXmlFile(string $filePath, $libXMLExtraOptions = null): self
                 $xml = \file_get_contents($filePath);
             }
         } catch (\Exception $e) {
-            throw new \RuntimeException("Could not load file ${filePath}");
+            throw new \RuntimeException("Could not load file {$filePath}");
         }
 
         if ($xml === false) {
-            throw new \RuntimeException("Could not load file ${filePath}");
+            throw new \RuntimeException("Could not load file {$filePath}");
         }
 
         return $this->loadXml($xml, $libXMLExtraOptions);

tests/HTML5DOMDocumentTest.php

@@ -64,14 +64,14 @@ public function testClassListEntries()
         $text = '';
         $html = $dom->findOne('html');
         foreach ($html->classList->entries() as $class) {
-            $text .= "[${class}]";
+            $text .= "[{$class}]";
         }
         static::assertSame('', $text);
 
         $text = '';
         $body = $dom->findOne('body');
         foreach ($body->classList->entries() as $class) {
-            $text .= "[${class}]";
+            $text .= "[{$class}]";
         }
         static::assertSame('[a][b][c]', $text);
     }