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POconverting-words-to-numbers-in-php II
 

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    <p>There is a great function here <a href="https://stackoverflow.com/questions/1077600/converting-words-to-numbers-in-php">Converting words to numbers in PHP</a> from El Yobo. But I have the problem that the string must begin with a written number. How can convert e.g. "iPhone has two hundred and thirty thousand, seven hundred and eighty-three apps" ?</p> <p>The explained function:</p> <pre><code>function wordsToNumber($data) { // Replace all number words with an equivalent numeric value $data = strtr( $data, array( 'zero' =&gt; '0', 'a' =&gt; '1', 'one' =&gt; '1', 'two' =&gt; '2', 'three' =&gt; '3', 'four' =&gt; '4', 'five' =&gt; '5', 'six' =&gt; '6', 'seven' =&gt; '7', 'eight' =&gt; '8', 'nine' =&gt; '9', 'ten' =&gt; '10', 'eleven' =&gt; '11', 'twelve' =&gt; '12', 'thirteen' =&gt; '13', 'fourteen' =&gt; '14', 'fifteen' =&gt; '15', 'sixteen' =&gt; '16', 'seventeen' =&gt; '17', 'eighteen' =&gt; '18', 'nineteen' =&gt; '19', 'twenty' =&gt; '20', 'thirty' =&gt; '30', 'forty' =&gt; '40', 'fourty' =&gt; '40', // common misspelling 'fifty' =&gt; '50', 'sixty' =&gt; '60', 'seventy' =&gt; '70', 'eighty' =&gt; '80', 'ninety' =&gt; '90', 'hundred' =&gt; '100', 'thousand' =&gt; '1000', 'million' =&gt; '1000000', 'billion' =&gt; '1000000000', 'and' =&gt; '', ) ); // Coerce all tokens to numbers $parts = array_map( function ($val) { return floatval($val); }, preg_split('/[\s-]+/', $data) ); $stack = new SplStack; // Current work stack $sum = 0; // Running total $last = null; foreach ($parts as $part) { if (!$stack-&gt;isEmpty()) { // We're part way through a phrase if ($stack-&gt;top() &gt; $part) { // Decreasing step, e.g. from hundreds to ones if ($last &gt;= 1000) { // If we drop from more than 1000 then we've finished the phrase $sum += $stack-&gt;pop(); // This is the first element of a new phrase $stack-&gt;push($part); } else { // Drop down from less than 1000, just addition // e.g. "seventy one" -&gt; "70 1" -&gt; "70 + 1" $stack-&gt;push($stack-&gt;pop() + $part); } } else { // Increasing step, e.g ones to hundreds $stack-&gt;push($stack-&gt;pop() * $part); } } else { // This is the first element of a new phrase $stack-&gt;push($part); } // Store the last processed part $last = $part; } return $sum + $stack-&gt;pop(); } </code></pre>
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