Viewing posts from: regular expression

16
Oct

Learn how to use PHP regex to validate float numbers

By admin|PHP

If you want only input 0-9 and only once “.” then you can use following regex. /^-?(?:\d+|\d*\.\d+)$/ This matches normal floats e.g. 3.14, shorthands for decimal part only e.g. .5 and integers e.g. 9 as well as negative numbers. echo preg_match(‘/^-?(?:\d+|\d*\.\d+)$/’, ‘123.12’); // return 1 echo preg_match(‘/^-?(?:\d+|\d*\.\d+)$/’, ‘123.12.2’); // return 0

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13
Oct

Learn how to use JavaScript match() Method

By admin|JavaScript

The match() method searches a string for a match against a regular expression, and returns the matches, as an Array object. Note: If the regular expression does not include the g modifier (to perform a global search), the match() method will return only the first match in the string. This method returns null if no […]

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