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substr_compare
Binary safe comparison of 2 strings from an offset, up to length characters
(PHP 5)
int substr_compare ( string main_str, string str, int offset [, int length [, bool case_insensitivity]] )
substr_compare() compares main_str from position offset with str up to length characters.
Parameters
- main_str
- str
- offset
The start position for the comparison. If negative, it starts counting from the end of the string.
- length
The length of the comparison.
- case_insensitivity
If case_insensitivity is
TRUE, comparison is case insensitive.
Return Values
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.
Examples
Example 2474. A substr_compare() example
<?php
echo substr_compare("abcde", "bc", 1, 2); // 0
echo substr_compare("abcde", "de", -2, 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
?>