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]] )

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
?>

Code Examples / Notes » substr_compare

Modified version of the original posted function. Use this one: <?php if (!function_exists('substr_compare')) { function substr_compare($main_str, $str, $offset, $length = NULL, $case_insensitivity = false) { $offset = (int) $offset; // Throw a warning because the offset is invalid if ($offset >= strlen($main_str)) { trigger_error('The start position cannot exceed initial string length.', E_USER_WARNING); return false; } // We are comparing the first n-characters of each string, so let's use the PHP function to do it if ($offset == 0 && is_int($length) && $case_insensitivity === true) { return strncasecmp($main_str, $str, $length); } // Get the substring that we are comparing if (is_int($length)) { $main_substr = substr($main_str, $offset, $length); $str_substr = substr($str, 0, $length); } else { $main_substr = substr($main_str, $offset); $str_substr = $str; } // Return a case-insensitive comparison of the two strings if ($case_insensitivity === true) { return strcasecmp($main_substr, $str_substr); } // Return a case-sensitive comparison of the two strings return strcmp($main_substr, $str_substr); } } ?>

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]] )

Example 2474. A substr_compare() example

Code Examples / Notes » substr_compare

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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]] )