This question already has an answer here:
This is just kind of a question out of curiosity. Is there a PHP function at this point that converts a number into the textual equivalent? For example 1 = 'one'. 1000 = 'one-thousand'.
I don't think this would really be all that hard to make. Generally the way we speak our numbers is pretty consistant except for the first 20 numbers. I haven't been able to find a function like that though.
I might end up making one though. Could be kind of a fun simple-AI project.
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With intl/NumberFormatter:
var_dump(
numfmt_create('en_US', NumberFormatter::SPELLOUT)->format(655)
);