How can regular expressions be used to remove spaces in PHP, specifically in bank account numbers?

To remove spaces from bank account numbers in PHP using regular expressions, you can use the `preg_replace` function to match and replace all spaces in the string with an empty string. This will effectively remove all spaces from the bank account number. 

$bankAccountNumber = "1234 5678 9012 3456";
$cleanedAccountNumber = preg_replace('/\s+/', '', $bankAccountNumber);

echo $cleanedAccountNumber; // Output: 1234567890123456

Keywords

regular expressions remove spaces PHP bank account numbers string manipulation

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