Toms Homepage

PHP Manual

substr_compare

(PHP 5)

substr_compare -- Binary safe optionally case insensitive comparison of 2 strings from an offset, up to length characters

Description

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.

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

<?php
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
?>

Prev	Home	Next
strtr	Up	substr_count