strncasecmp

(PHP 4 >= 4.0.2, PHP 5)

strncasecmp -- Binary safe case-insensitive string comparison of the first n characters

Description

int strncasecmp ( string str1, string str2, int len )

This function is similar to strcasecmp(), with the difference that you can specify the (upper limit of the) number of characters (len) from each string to be used in the comparison.

Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

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djdykes
31-Aug-2005 06:43


Hi all,



be aware when comparing strings using the strcmp family. if you write code like this... 



if (strncasecmp($string, 'Trudeau', 4))

 print "true";



The above code returns 1 which evaluates to boolean 'true'



that statement will always be true... because these functions return 0 only when equal. so a better test would be



if ( (strncasecmp($string, 'Trudeau', 4)) == 0)

 print "true";



always test these functions equality with 0



regards

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