> but is implicitly converted into strings when it is entered.
use floatVal($str1) === floatVal($str2) then ... I honestly cannot spot any problem in what you wanna do, I can just spot an error in the root of the process: threat strings as numbers, comparing potatoes and tomatoes ... there are filters used for validation as well in php, maybe those filters, hopefully faster than PCRE, could help you to understand if a string is a number, or not. Regards _________________________________________________________________ Keep your friends updated—even when you’re not signed in. http://www.microsoft.com/middleeast/windows/windowslive/see-it-in-action/social-network-basics.aspx?ocid=PID23461::T:WLMTAGL:ON:WL:en-xm:SI_SB_5:092010