Binary safe string comparison
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    strcmp

    (PHP 4, PHP 5, PHP 7, PHP 8)

    strcmp — Binary safe string comparison

    Description

    strcmp(string $string1, string $string2): int

    Note that this comparison is case sensitive.

    Parameters

    string1

    The first string.

    string2

    The second string.

    Return Values

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

    Changelog

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

    Examples

    Example #1 strcmp() example

    <?php$var1 = "Hello";$var2 = "hello";if (strcmp($var1, $var2) !== 0) {    echo '$var1 is not equal to $var2 in a case sensitive string comparison';}?>

    See Also

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