strncasecmp

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

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

    Description

    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.

    Parameters

    string1

    The first string.

    string2

    The second string.

    length

    The length of strings to be used in the comparison.

    Return Values

    Returns -1 if string1 is less than string2; 1 if string1 is greater than string2, and 0 if they are equal.

    Changelog

    VersionDescription
    8.2.0 This function now returns -1 or 1, where it previously returned a negative or positive number.

    Examples

    Example #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';
    }
    ?>

    See Also

    • 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
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