Comparing strings

[brandonschnell]

use:

if(strcmp($string1,$string2) != 0) { }

strcmp is case sensitive and returns a value other than 0 when the strings are not equal.

using "$string1 != $string2" isn't a reliable way to test strings

[Anon]

After my last post about my site not working on my server I have come to the conclusion the problem lies in my string comparison.

is this wrong:
if($string1 != $string2) { }

and what does strcmp($str1, $str2) return

Thanks

[sepodati]

Why do you say it's not reliable?

---John Holmes...

[Anon]

Where are your values for $string1 and $string2 coming from?

I had problems after comparing a string from a form and a string from a query field in postgres, where the string value came from a field of type CHAR(8). Inspection of the string lengths showed this field to be 8 even if a value of 3 characters was originally inserted (over the web with php).

I got around this by using the trim function, so you could do something like this:

if (strcmp($String1, trim($String2)) ==0 ) {
do stuff;
}