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<?php |
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/** |
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* This file shows five different ways to iterate through the contents of a |
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* QueryPath. |
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* |
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* QueryPath wraps zero or more elements (or, more generally, just objects). |
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* Most of the operations available in QueryPath will operate on the entire |
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* set of objects. Sometimes, though, it is desirable to go through the results |
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* one at a time. These examples exhibit five ways of accomplishing this. |
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* |
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* Keep in mind that PHP passes objects (more or less) by reference, which means |
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* that a change to an item inside of a loop will be reflected in the main QueryPath. |
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* In other words, there is no need to put data back into the QueryPath if it is |
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* altered during a loop. |
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* |
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* @see QueryPath |
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* |
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* @author M Butcher <[email protected]> |
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* @license LGPL (The GNU Lesser GPL) or an MIT-like license. |
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*/ |
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require '../src/QueryPath/QueryPath.php'; |
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$demo = '<?xml version="1.0" ?> |
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<data> |
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<li>Foo</li> |
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<li>Foo</li> |
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<li>Foo</li> |
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<li>Foo</li> |
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<li>Foo</li> |
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</data> |
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'; |
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$qp = qp($demo, 'data'); |
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// Iterate over elements as DOMNodes: |
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foreach ($qp->get() as $li_ele) { |
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print $li_ele->tagName . PHP_EOL; // Prints 'li' five times. |
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} |
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// Iterate over elements as QueryPath objects |
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foreach ($qp as $li_qp) { |
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print $li_qp->tag() . PHP_EOL; // Prints 'li' five times |
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} |
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function callbackFunction($index, $element) { |
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print $element->tagName . PHP_EOL; |
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} |
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// Iterate using a callback function |
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$qp->each('callbackFunction'); |
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// Iterate using a Lambda-style function |
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$qp->eachLambda('return $item->tagName . PHP_EOL;'); |
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// Loop through by index/count |
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for ($i = 0; $i < $qp->size(); ++$i) { |
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$domElement = $qp->get($i); |
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print $domElement->tagName . PHP_EOL; |
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} |
arthurkushman /
querypath
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