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<?php |
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namespace FluidXml; |
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class FluidHelper |
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{ |
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public static function isAnXmlString($string) |
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{ |
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// Removes any empty new line at the beginning, |
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// otherwise the first character check may fail. |
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$string = \ltrim($string); |
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return $string[0] === '<'; |
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} |
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public static function exportNode(\DOMDocument $dom, \DOMNode $node, $html = false) |
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{ |
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// $delegate = $html ? 'saveHTML' : 'saveXML'; |
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// return $dom->$delegate($node); |
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if ($html) { |
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return static::domnodeToHtml($node); |
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} |
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return $dom->saveXML($node); |
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} |
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public static function domdocumentToStringWithoutHeaders(\DOMDocument $dom, $html = false) |
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{ |
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return static::exportNode($dom, $dom->documentElement, $html); |
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} |
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public static function domnodelistToString(\DOMNodeList $nodelist, $html = false) |
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{ |
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$nodes = []; |
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// Algorithm 1: |
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foreach ($nodelist as $n) { |
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$nodes[] = $n; |
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} |
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// Algorithm 2: |
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// $nodes = \iterator_to_array($nodelist); |
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// Algorithm 1 is faster than Algorithm 2. |
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return static::domnodesToString($nodes, $html); |
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} |
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public static function domnodesToString(array $nodes, $html = false) |
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{ |
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$delegate = $html ? 'saveHTML' : 'saveXML'; |
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$dom = $nodes[0]->ownerDocument; |
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$xml = ''; |
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foreach ($nodes as $n) { |
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$xml .= static::exportNode($dom, $n, $html) . PHP_EOL; |
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} |
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return \rtrim($xml); |
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} |
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public static function simplexmlToStringWithoutHeaders(\SimpleXMLElement $element, $html = false) |
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{ |
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$dom = \dom_import_simplexml($element); |
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return static::exportNode($dom->ownerDocument, $dom, $html); |
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} |
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public static function domdocumentToHtml($dom, $clone = true) |
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{ |
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if ($clone) { |
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$dom = $dom->cloneNode(true); |
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} |
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$voids = ['area', |
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'base', |
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'br', |
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'col', |
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'colgroup', |
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'command', |
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'embed', |
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'hr', |
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'img', |
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'input', |
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'keygen', |
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'link', |
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'meta', |
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'param', |
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'source', |
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'track', |
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'wbr']; |
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// Every empty node. There is no reason to match nodes with content inside. |
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$query = '//*[not(node())]'; |
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$nodes = (new \DOMXPath($dom))->query($query); |
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foreach ($nodes as $n) { |
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if (! \in_array($n->nodeName, $voids)) { |
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// If it is not a void/empty tag, |
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// we need to leave the tag open. |
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$n->appendChild(new \DOMProcessingInstruction('X-NOT-VOID')); |
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} |
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} |
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$html = static::domdocumentToStringWithoutHeaders($dom); |
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// Let's remove the placeholder. |
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$html = \preg_replace('/\s*<\?X-NOT-VOID\?>\s*/', '', $html); |
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return $html; |
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} |
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public static function domnodeToHtml(\DOMNode $node) |
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{ |
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$dom = new \DOMDocument(); |
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$dom->formatOutput = true; |
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$dom->preserveWhiteSpace = false; |
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$node = $dom->importNode($node, true); |
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$dom->appendChild($node); |
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return static::domdocumentToHtml($dom, false); |
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} |
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} |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.