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<?php |
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namespace QueryPath\Extension; |
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use QueryPath\DOMQuery; |
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use QueryPath\Extension; |
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use QueryPath\Query; |
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use QueryPath\Exception; |
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/** |
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* A QueryPath extension that adds extra methods for formatting node values. |
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* |
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* This extension provides two methods: |
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* |
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* - format() |
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* - formatAttr() |
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* |
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* Usage: |
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* <code> |
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* <?php |
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* QueryPath::enable('Noi\QueryPath\FormatExtension'); |
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* $qp = qp('<?xml version="1.0"?><root><item score="12000">TEST A</item><item score="9876.54">TEST B</item></root>'); |
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* |
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* $qp->find('item')->format(function ($text) { |
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* return ucwords(strtolower($text)); |
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* }); |
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* $qp->find('item')->formatAttr('score', 'number_format', 2); |
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* |
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* $qp->writeXML(); |
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* </code> |
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* |
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* OUTPUT: |
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* <code> |
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* <?xml version="1.0"?> |
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* <root> |
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* <item score="12,000.00">Test A</item> |
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* <item score="9,876.54">Test B</item> |
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* </root> |
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* </code> |
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* |
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* @see FormatExtension::format() |
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* @see FormatExtension::formatAttr() |
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* |
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* @author Akihiro Yamanoi <[email protected]> |
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*/ |
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class Format implements Extension |
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{ |
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protected $qp; |
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public function __construct(Query $qp) |
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{ |
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$this->qp = $qp; |
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} |
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/** |
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* Formats the text content of each selected element in the current DOMQuery object. |
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* |
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* Usage: |
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* <code> |
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* <?php |
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* QueryPath::enable('Noi\QueryPath\FormatExtension'); |
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* $qp = qp('<?xml version="1.0"?><root><div>Apple</div><div>Orange</div></root>'); |
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* |
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* $qp->find('div')->format('strtoupper'); |
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* $qp->find('div')->format(function ($text) { |
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* return '*' . $text . '*'; |
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* }); |
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* |
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* $qp->writeXML(); |
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* </code> |
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* |
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* OUTPUT: |
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* <code> |
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* <?xml version="1.0"?> |
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* <root> |
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* <div>*APPLE*</div> |
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* <div>*ORANGE*</div> |
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* </root> |
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* </code> |
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* |
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* @param callable $callback The callable to be called on every element. |
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* @param mixed $args [optional] Zero or more parameters to be passed to the callback. |
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* @param null $additional |
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* @return DOMQuery The DOMQuery object with the same element(s) selected. |
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* @throws Exception |
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*/ |
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public function format($callback, $args = null, $additional = null): Query |
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{ |
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if (isset($additional)) { |
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$args = func_get_args(); |
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array_shift($args); |
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} |
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$getter = function ($qp) { |
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return $qp->text(); |
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}; |
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$setter = function ($qp, $value) { |
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$qp->text($value); |
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}; |
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return $this->forAll($callback, $args, $getter, $setter); |
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} |
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/** |
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* Formats the given attribute of each selected element in the current DOMQuery object. |
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* |
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* Usage: |
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* <code> |
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* QueryPath::enable('Noi\QueryPath\FormatExtension'); |
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* $qp = qp('<?xml version="1.0"?><root><item label="_apple_" total="12,345,678" /><item label="_orange_" total="987,654,321" /></root>'); |
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* |
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* $qp->find('item') |
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* ->formatAttr('label', 'trim', '_') |
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* ->formatAttr('total', 'str_replace[2]', ',', ''); |
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* |
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* $qp->find('item')->formatAttr('label', function ($value) { |
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* return ucfirst(strtolower($value)); |
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* }); |
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* |
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* $qp->writeXML(); |
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* </code> |
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* |
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* OUTPUT: |
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* <code> |
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* <?xml version="1.0"?> |
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* <root> |
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* <item label="Apple" total="12345678"/> |
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* <item label="Orange" total="987654321"/> |
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* </root> |
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* </code> |
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* |
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* @param string $attrName The attribute name. |
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* @param callable $callback The callable to be called on every element. |
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* @param mixed $args [optional] Zero or more parameters to be passed to the callback. |
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* @param null $additional |
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* @return DOMQuery The DOMQuery object with the same element(s) selected. |
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* @throws Exception |
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*/ |
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public function formatAttr($attrName, $callback, $args = null, $additional = null): Query |
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{ |
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if (isset($additional)) { |
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$args = array_slice(func_get_args(), 2); |
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} |
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$getter = function ($qp) use ($attrName) { |
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return $qp->attr($attrName); |
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}; |
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$setter = function ($qp, $value) use ($attrName) { |
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return $qp->attr($attrName, $value); |
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}; |
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return $this->forAll($callback, $args, $getter, $setter); |
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} |
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/** |
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* @param $callback |
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* @param $args |
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* @param $getter |
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* @param $setter |
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* @return Query |
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* @throws Exception |
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*/ |
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protected function forAll($callback, $args, $getter, $setter): Query |
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{ |
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[$callback, $pos] = $this->prepareCallback($callback); |
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if (!is_callable($callback)) { |
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throw new Exception('Callback is not callable.'); |
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} |
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$padded = $this->prepareArgs($args, $pos); |
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foreach ($this->qp as $qp) { |
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$padded[$pos] = $getter($qp); |
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$setter($qp, call_user_func_array($callback, $padded)); |
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} |
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return $this->qp; |
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} |
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/** |
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* @param $callback |
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* @return array |
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*/ |
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protected function prepareCallback($callback) |
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{ |
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if (is_string($callback)) { |
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[$callback, $trail] = $this->splitFunctionName($callback); |
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$pos = (int)$trail; |
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} elseif (is_array($callback) && isset($callback[2])) { |
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$pos = $callback[2]; |
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$callback = array($callback[0], $callback[1]); |
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} else { |
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$pos = 0; |
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} |
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return array($callback, $pos); |
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} |
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/** |
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* @param string $string |
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* @return array[]|false|string[] |
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*/ |
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protected function splitFunctionName(string $string) |
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{ |
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// 'func_name:2', 'func_name@3', 'func_name[1]', ... |
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return preg_split('/[^a-zA-Z0-9_\x7f-\xff][^\d]*|$/', $string, 2); |
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} |
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/** |
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* @param $args |
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* @param $pos |
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* @return array |
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*/ |
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protected function prepareArgs($args, $pos): array |
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{ |
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$padded = array_pad((array) $args, (0 < $pos) ? $pos - 1 : 0, null); |
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array_splice($padded, $pos, 0, array(null)); // insert null as a place holder |
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return $padded; |
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} |
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} |