SSN regex PHP
SSN stands for social security number and is issued to US citizens, permanent and temporary residents.
SSN regex
This number has the following rules:
- consists of 9 digits and usually divided by 3 parts by hyphen (XXX-XX-XXXX).
- The first part can not be 000, 666, or between 900-900.
- Second part can not be 00
- Third part can not be 0000
Below is a simple SSN regular expression that is divided by hyphens.
- If you want to make hyphens optional, put ? after each dash
- If you want to validate SSN without hyphens - just remove them
"/^(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}$/"
Enter a text in the input above to see the result
Example code in PHP:
// Validate SSN
$ssn_validation_regex = '/^(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}$/';
echo preg_match($ssn_validation_regex, '100-22-3333'); // returns 1
// Extract SSN from a string
$extract_ssn_pattern = '/(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}/';
$string_to_match = 'My SSN is 100-22-3333';
preg_match_all($extract_ssn_pattern, $string_to_match, $matches);
print_r($matches[0]) // matches[0] is ['100-22-3333']
