Validating number xfactor speeddating

For most purposes, this will be sufficient and has the advantages of both speed and clarity.$Bool Result = empty(trim($Test, ' -.,0123456789')); If the $Test contains any character that is not a valid part of a number the remaining string will not be you want to be more restrictive of the ' -' then you can use a separate trim for that and nest it. ordinal('asdf'); returns false for the exact same reason. signed integers on a 32-bit system (and the same issue on a 64-bit system using 0x7FFFFFFFFFFFFFFF because of two's compliment, anything higher will become a negative number): ordinal(0x7FFFFFFF ); returns 2147483647th (which is correct) ordinal(0x7FFFFFFF 1); returns false.*/ if speed is important, the liberal use of regex should be avoided, especially complex ones like those here.

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To James holwell: Maybe your function was more strickt, but profides FALSE to any numeric string that wasnt written in the English/American notition. But as stated the same test was performed using a string for $val and the is_string() function and the same thing occurs. The solution then is to explicitly cast $val in to be an int and then is_numeric will work. it also allows for an exponent suffix, the pre-decimal digits are optional and it enforces using either grouped or ungrouped integer parts. the best way to check whethervariable is numeric is to check its ascii code :) function is_num($var)this function can be usefull if you wont to chec eg $_POSTfunction test_post($tab)//forech return $post;} Be careful when using `is_numeric()` to validate user input and protect against SQL injection. adjustments: i'm sure this still isn't optimal, but it should also cover japanese-style numerals and it fixed a couple of other issues with the other regexen. - set_locale() does not exist, you must use setlocale() instead- you have to enclose 12,25 with quotes; otherwise PHP will think that the function gets _two_ arguments: 12 and 25 (depending on PHP version and setup you may additionally get a PHP warning)- if you don't enclose 12,25 with quotes the first argument will be the inspected value (12), the second value (25) is discarded. This was the example code:----- set_locale(LC_NUMERIC,'fr'); is_numeric(12.25); // Return False is_numeric(12,25); // Return True is_float(12.25); //Return False is_float(12,25); //Return True-----This is nonsense! Eg=function(a,b,c,d);n.tg=function(a,b,c,d);n.rf=function(a);n. Cc=ea(2);function Hh(a) Hh.prototype.df=function(a); Hh.Trigger=Hh.prototype.df; Hh.prototype.uh=function(a); Hh.Horizontal Position=Hh.prototype.uh; Hh.prototype. Ch; Hh.prototype.$e=function(a); Hh.Overlap Trigger=Hh.prototype.$e; Hh.prototype.open=function(); Hh.prototype.open=Hh.prototype.open; Hh.prototype.close=function(); Hh.prototype.close=Hh.prototype.close;function Ih(a) function Jh(a,b){var c=b[0];b=q(b);for(var d=b.next();!'42' is numeric 1337 is numeric 1337 is numeric 1337 is numeric 1337 is numeric 1337 is numeric 'not numeric' is NOT numeric array () is NOT numeric 9.0999999999999996447286321199499070644378662109375 is numeric NULL is NOT numeric The above script will output:bool(true)So this function is not intimidated by super-big numbers. PS: Also note that if you write is_numeric (45thg), this will generate a parse error (since the parameter is not enclosed between apostrophes or double quotes). The documentation does not clarify what happens if you the input is an empty string - it correctly returns false in my experience. If we really want just an integer, this function is too broad."Source: Be careful when using is_numeric() to escape SQL strings.Useful to state these odd cases, for when you see code that checks for an empty string and is_numeric, you can tell it's a waste of a comparison. is_numeric('0123') returns true but 0123 without quotes cannot be inserted into SQL. All of the following are valid numbers to is_numeric():- 1- 1.123- 0x FF- 0123.45e6See the problem?

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