错误：[处理此指令时发生错误]和正则表达式混淆

Question

I have downloaded a website using ftp , when I test the site in my host , it shows the error

[an error occurred while processing this directive]

You can check this error here http://www.excoflare.com/dev2011/amplitechnic/

Also, I am struggle to get a regular expression for a valid floating point number . I used this one :

expression: "if (VAL.match(/^[0-9]*\\.?[0-9]/)) return true; else return false;",

But the above expression returns true even if I write say 1.x ?

Sorry I put the questions together.

Answer 1

It's a web server error:

Usually, when something goes wrong with your SSI directive, you get the message [an error occurred while processing this directive]

Apache Tutorial: Introduction to Server Side Includes

It is probably caused by something that looks like an SSI directive in you page's code:

<!-- Here's the call to the silent-counter script -->
[an error occurred while processing this directive]
<!-------------------------------------------------->

SSI directives have the following syntax:

<!--#element attribute=value attribute=value ... -->

Also, why use regexps when there are specialized functions for determining whether it is a float or not, like is_numeric or is_float (if you need to check variable type) in php.

For jQuery client-side validation you could use JavaScripts parseFloat() function (if it returns NaN, when your input is not a number). as suggested here: jQuery input validation for double/float

If you want a regexp, you may have a look at this question: Javascript/jQuery - Float Validating?

Answer 2

^[0-9]*\.?[0-9]

Will match the 1 and since you have no end of line anchor $ it matches (partially) your input.

For a better floating point regex you can use this :

^[-+]?[0-9]*\.?[0-9]+\b$

This disregards scientific notation. It matches an integer or a floating point number with optional integer part. The sign is optional.

If you also want to match scientific notation you can use this :

^[-+]?(?:[0-9]+(?:\.[0-9]*)?|\.[0-9]+)(?:[eE][-+]?[0-9]+)?$

About the other error I can't help.