PHP regular expression – filter number only

by

Using is_numeric or intval is likely the best way to validate a number here, but to answer your question you could try using preg_replace instead. This example removes all non-numeric characters:

$output = preg_replace( '/[^0-9]/', '', $string );

More Related Contents:

  1. PHP validation/regex for URL
  2. PHP regular expressions: No ending delimiter ‘^’ found in
  3. Replace URLs in text with HTML links
  4. Remove non-utf8 characters from string
  5. How to remove accents and turn letters into “plain” ASCII characters? [duplicate]
  6. Regexp to add attribute in any xml tags
  7. PHP remove special character from string
  8. preg_replace: add number after backreference
  9. Retrieve all hashtags from a tweet in a PHP function
  10. How do I remove blank lines from text in PHP?
  11. How to use RegexIterator in PHP
  12. Regular expressions for a range of unicode points PHP
  13. How to write a recursive regex that matches nested parentheses?
  14. Split alphanumeric string between leading digits and trailing letters
  15. Allow only [a-z][A-Z][0-9] in string using PHP
  16. non-breaking utf-8 0xc2a0 space and preg_replace strange behaviour
  17. What literal characters should be escaped in a regex?
  18. Get last whole number in a string
  19. RegExp in preg_match function returning browser error
  20. Regex for password PHP [duplicate]
  21. regular expression and forward slash
  22. Regular Expressions: How to Express \w Without Underscore
  23. Youtube I.D parsing for new URL formats
  24. PHP and regexp to accept only Greek characters in form
  25. How to validate that a string only contain lowercase letters?
  26. Regular expression: find range except for one letter or a range
  27. Function To Create Regex Matching a Number Range
  28. How to get the shortest rather than longest possible regex match with preg_match()
  29. Regex to match an IP address [closed]
  30. PHP’s preg_replace regex that matches multiple lines

Leave a Comment