checkType

The checkType function will test a value to see if it is the specified "type" (i.e. number, float, email, etc.) and return true if the input value matches the type.

Acceptable values for "type" are:

• alphanumeric - alphanumeric characters only
• alphanumeric_ws - alphanumeric characters + spaces
• alpha - alpha characters only (no numbers)
• alpha_under - alpha characters only, including underscores
• alpha_ws - alpha characters only + spaces
• checkbox - checks for "on" or "off"
• comma_list - checks for a list of elements separated by commas
• date - checks to ensure value is a date
• directory - tests that the value is a directory on the local server
• email - ensures the value is a valid email address
• file - ensures the value is a file
• float - checks that the value is a floating point number
• hex - checks if the value is a hexidecimal value
• ip_address - checks the value to ensure it is a valid IP Address
• is_captcha - checks the value to see if it is a valid CAPTCHA code for the current session
• md5 - checks the value to ensure it is a 32 character long MD5 hash
• number_list - checks the value to ensure it is a set of numbers separated by commas
• number_nz - ensures the value is a positive integer
• number_nn - ensures the value is a number greater than or equal to zero
• onoff - ensures the value is either "on" or "off"
• price - ensures the value is a valid price
• sha1 - checks that the value is a SHA1 hash (40 characters)
• url - checks the value to be sure it is a valid URL
• yesno - checks the value to ensure it is either "yes" or "no"

• return: returns true/false on success/fail

• string $input: String to test
• string $type: "Type" to test incoming string against.
• array $args: Additional arguments for checktype "type"