Binary safe string comparison of the first n characters_鑴氭湰瀛﹀爞

说明

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 from each string to be used in the comparison.

Note that this comparison is case sensitive.

参数

str1: The first string.
str2: The second string.
len: Number of characters to use in the comparison.

返回值

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

参见

preg_match() - 进行正则表达式匹配
strcmp() - Binary safe string comparison
strcasecmp() - Binary safe case-insensitive string comparison
substr() - Return part of a string
stristr() - Case-insensitive strstr
strncasecmp() - Binary safe case-insensitive string comparison of the first n characters
strstr() - Find first occurrence of a string