PHP regex – valid float number

by 
/^-?(?:\d+|\d*\.\d+)$/

This matches normal floats e.g. 3.14, shorthands for decimal part only e.g. .5 and integers e.g. 9 as well as negative numbers.

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. remove script tag from HTML content
  7. Regexp to add attribute in any xml tags
  8. PHP remove special character from string
  9. preg_replace: add number after backreference
  10. Retrieve all hashtags from a tweet in a PHP function
  11. How do I remove blank lines from text in PHP?
  12. How to use RegexIterator in PHP
  13. Regular expressions for a range of unicode points PHP
  14. How to write a recursive regex that matches nested parentheses?
  15. Split alphanumeric string between leading digits and trailing letters
  16. Allow only [a-z][A-Z][0-9] in string using PHP
  17. non-breaking utf-8 0xc2a0 space and preg_replace strange behaviour
  18. What literal characters should be escaped in a regex?
  19. Warning: preg_replace(): Unknown modifier ‘g’
  20. Validating US phone number with php/regex
  21. php regex [b] to
  22. Regex to strip comments and multi-line comments and empty lines
  23. RegExp in preg_match function returning browser error
  24. Regex for password PHP [duplicate]
  25. regular expression and forward slash
  26. How to validate phone number using PHP? [duplicate]
  27. What does [\S\s]* mean in regex in PHP?
  28. UTF-8 in PHP regular expressions [duplicate]
  29. Get non-numeric characters then number on each line of a block of texf
  30. Validate date format in php

Leave a Comment