   #PHP Manual String functions strncasecmp strpos

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                                    strncmp

   (PHP 4 )
   strncmp --  Binary safe string comparison of the first n characters

Description

   int 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. If any of the strings is shorter
   than len, then the length of that string will be used for 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().
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