John Davidson

Message:

How can I extract half-width numbers in a character string and separate them into 3 digits with php?

Example
　original string：I have 10000 dollars.
　After conversion：I have 10,000 dollars.

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My Answer:
You can achieve this by using regular expressions in PHP. Here's a code snippet to extract half-width numbers from a string and separate them into 3 digits:

php
// Original string
$string = "I have 10000 dollars.";

// Extract half-width numbers using regular expression
preg_match_all('/\d+/', $string, $matches);

// Separate each number into 3 digits
foreach ($matches[0] as $match) {
$formatted_number = number_format($match);
$string = str_replace($match, $formatted_number, $string);
}

// Output the converted string
echo $string;
?>


This code snippet will output:

I have 10,000 dollars.


This code uses `preg_match_all` to extract all half-width numbers from the string, then loops through each number and uses `number_format` to separate them into 3 digits. Finally, it replaces the original number with the formatted number in the string.