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strncmp (PHP 4 , PHP 5) strncmp --
Binary safe string comparison of the first n characters
Descriptionint strncmp ( string str1, string str2, int len)
This function is similar to strcmp(), 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.
Note that this comparison is case sensitive.
See also ereg(),
strncasecmp(),
strcasecmp(), substr(),
stristr(), strcmp(), and
strstr().
Anonymous
17-Apr-2002 07:46
strncmp("sample","sam",4) returns 1 because the final
requirement is if one string terminates before len, then the other must
also terminate at that position.
You can imagine that all your
strings have one more final, invisible "termination" character.
If that termination character happens to be within in len, then it must
match, too.
For instance, write that termination character with,
say, the sequence "\0". Then you can equivalently consider that
function call as
strncmp("sample\0","sam\0",4).
So, the
"p" in "sample" does not match the termination
character in "sam".
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strncasecmp
