How Can You Turn Words Like "One Thousand" into Integers in PHP?

Converting Words to Numbers in PHP: Finding Hidden Integer Values Within Text

In many programming scenarios, you may encounter the need to convert numerical values expressed as words into their corresponding integer representations. While there are numerous resources available for converting numbers to words, finding reliable solutions for the reverse task can be more challenging.

Fortunately, there are specific algorithms and techniques to retrieve numerical values from text. One notable example is the pseudo-code algorithm outlined on Ask Yahoo (http://answers.yahoo.com/question/index?qid=20090216103754AAONnDz).

This algorithm leverages tokenization and grammar rules to interpret text containing numerical values. Tokens include:

• POWER: thousand, million, billion
• HUNDRED: hundred
• TEN: twenty, thirty, ... ninety
• UNIT: one, two, three, ... nine
• SPECIAL: ten, eleven, twelve, ... nineteen

The algorithm processes tokens right-to-left in the following steps:

1. Collect tokens from the right until reaching a POWER or the end of the string.
2. Parse token groups for patterns such as special, ten, hundred, and their combinations to determine the last three digits of the number.
3. If the string has been fully processed, the conversion is complete.
4. If a POWER was encountered, repeat from step 1 until reaching a higher POWER or the end of the string.

By following these rules, the algorithm effectively extracts numerical values hidden within text, allowing you to incorporate integer data where needed.

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