strncasecmp

(PHP 4 >= 4.0.2, PHP 5, PHP 7, PHP 8)

strncasecmp — Binary safe case-insensitive string comparison of the first n characters

Опис

strncasecmp(string $string1, string $string2, int $length): int

This function is similar to strcasecmp(), with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison.

Параметри

string1: The first string.
string2: The second string.
length: The length of strings to be used in the comparison.

Значення, що повертаються

Returns a value less than 0 if string1 is less than string2; a value greater than 0 if string1 is greater than string2, and 0 if they are equal. No particular meaning can be reliably inferred from the value aside from its sign.

Журнал змін

Версія	Опис
8.2.0	Тепер ця функція повертає `-1` або `1`, а не від'ємне або додатнє число, як раніше.

Приклади

Приклад #1 strncasecmp() example

<?php

$var1 = 'Hello John';
$var2 = 'hello Doe';
if (strncasecmp($var1, $var2, 5) === 0) {
    echo 'First 5 characters of $var1 and $var2 are equals in a case-insensitive string comparison';
}
?>

Прогляньте також

strncmp() - Binary safe string comparison of the first n characters
preg_match() - Perform a regular expression match
substr_compare() - Binary safe comparison of two strings from an offset, up to length characters
strcasecmp() - Binary safe case-insensitive string comparison
stristr() - Case-insensitive strstr
substr() - Return part of a string