(PHP 5)
substr_compare — Binary safe comparison of 2 strings from an offset, up to length characters
substr_compare() compares main_str from position offset with str up to length characters.
The start position for the comparison. If negative, it starts counting from the end of the string.
The length of the comparison.
If case_insensitivity is TRUE, comparison is case insensitive.
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.
| Version | Description |
|---|---|
| 5.1.0 | Added the possibility to use a negative offset . |
Example #1 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
?>