http://newsourcemedia.com/blog Focused on Interactive Design, Development and Marketing Mon, 07 May 2012 01:26:28 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://newsourcemedia.com/blog/php-validation-numbers-only-from/ http://newsourcemedia.com/blog/php-validation-numbers-only-from/#comments Tue, 30 Nov 1999 06:00:00 +0000 admin http://newsourcemedia.com/blog/1969/12/31/php-validation-numbers-only-from/ Continue reading →]]> Question: How to validate number values to and block all letters and symbol in a form. Answer: You can check the value or convert the value to an integer (number). 1) Check a value using is_int() to finds whether the given variable is an integer <? if(is_int($variable)) echo "Pass test"; else echo "Please use only numbers"; ?> 2) Note: To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric(). <? if(is_numeric($variable)) echo "Pass test"; else echo "Please use only numbers"; ?> 3) Convert the value to an integer (number) using settype. <?php $foo = "5bar"; // string $bar = true; // boolean settype($foo, "integer"); // $foo is now 5 (integer) settype($bar, "string"); // $bar is now "1" (string) ?> or you can use int to do the trick. <? $int=593; // $int is a integer $int.=""; // $int is now a string ?> ]]> http://newsourcemedia.com/blog/php-validation-numbers-only-from/feed/ 7