PHP substr_compare function

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substr_compare

(PHP 5)

substr_compare() compares main_str
from position offset with str
up to length characters.

Returns < 0 if main_str from position
offset is less than str, >
0 if it is greater than str, and 0 if they are equal.
If length is equal or greater than length of
main_str and length is set,
substr_compare() prints warning and returns FALSE.

If case_insensitivity is TRUE, comparison is case
insensitive.

Example 1. A substr_compare() example

echo substr_compare("abcde", "bc", 1, 2); // 0
echo substr_compare("abcde", "bcg", 1, 2); // 0
echo substr_compare("abcde", "BC", 1, 2, true); // 0
echo substr_compare("abcde", "bc", 1, 3); // 1
echo substr_compare("abcde", "cd", 1, 2); // -1
echo substr_compare("abcde", "abc", 5, 1); // warning