replace xml_tag with HTMLElement

core/polyfills.php

@@ -190,8 +190,8 @@ function stream_file(string $file, int $start, int $end): void
     }
 }
 
-if (!function_exists('http_parse_headers')) { #http://www.php.net/manual/en/function.http-parse-headers.php#112917
-
+# http://www.php.net/manual/en/function.http-parse-headers.php#112917
+if (!function_exists('http_parse_headers')) {
     /**
      * #return string[]
      */
@@ -478,25 +478,6 @@ function clamp(?int $val, ?int $min=null, ?int $max=null): int
     return $val;
 }
 
-function xml_tag(string $name, array $attrs=[], array $children=[]): string
-{
-    $xml = "<$name ";
-    foreach ($attrs as $k => $v) {
-        $xv = str_replace('&#039;', '&apos;', htmlspecialchars((string)$v, ENT_QUOTES));
-        $xml .= "$k=\"$xv\" ";
-    }
-    if (count($children) > 0) {
-        $xml .= ">\n";
-        foreach ($children as $child) {
-            $xml .= xml_tag($child);
-        }
-        $xml .= "</$name>\n";
-    } else {
-        $xml .= "/>\n";
-    }
-    return $xml;
-}
-
 /**
  * Original PHP code by Chirp Internet: www.chirp.com.au
  * Please acknowledge use of this code by including this header.

core/tests/polyfills.test.php

@@ -76,14 +76,6 @@ class PolyfillsTest extends TestCase
         $this->assertEquals(clamp(15, 5, 10), 10);
     }
 
-    public function test_xml_tag()
-    {
-        $this->assertEquals(
-            "<test foo=\"bar\" >\n<cake />\n</test>\n",
-            xml_tag("test", ["foo"=>"bar"], ["cake"])
-        );
-    }
-
     public function test_truncate()
     {
         $this->assertEquals(truncate("test words", 10), "test words");