grapheme_strrpos - PHP code example

The php Function Grapheme_Strrpos

PHP offers a wide range of built-in functions that cover many common programming tasks. For example, there are array functions that allow you to sort, search, combine, and perform calculations on the elements in an array. Moreover, there are string functions that provide you with different operations for manipulating strings. The php function strpos() is one such string operation that provides you with the index of a substring in a string.

The php function grapheme_strrpos is similar to the php function strpos() but allows you to search for the first occurrence of a needle in a haystack string. In addition, the function supports negative offsets.

To use the php function, you must pass in the string $haystack and a needle string value. Then, the function will return the numeric index of the needle's occurrence in the string. The function also accepts a number of negative offsets, which is the number of characters that must be removed from the beginning of the string to reach the needle.

The php function grapheme_strrpos can be used to replace a needle string in a haystack string. The function will return the portion of the haystack string that begins at the numeric index of the needle and ends after the last occurrence of the needle. Moreover, the function can replace multiple needles in the haystack string and treat the entire haystack as a single string for replacement purposes. This is especially useful for formatting dynamically-generated HTML output without touching the original source code.

grapheme_strrpos example

$string = $this->string;

        if (0 > $offset) {
            // workaround https://bugs.php.net/74264             if (0 > $offset += grapheme_strlen($needle)) {
                $string = grapheme_substr($string, 0, $offset);
            }
            $offset = 0;
        }

        $i = $this->ignoreCase ? grapheme_strripos($string, $needle, $offset) : grapheme_strrpos($string, $needle, $offset);

        return false === $i ? null : $i;
    }

    public function join(array $strings, string $lastGlue = null): static
    {
        $str = parent::join($strings, $lastGlue);
        normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);

        return $str;
    }

if (!function_exists('grapheme_strlen')) {
    function grapheme_strlen($input) { return p\Grapheme::grapheme_strlen($input); }
}
if (!function_exists('grapheme_strpos')) {
    function grapheme_strpos($haystack, $needle, $offset = 0) { return p\Grapheme::grapheme_strpos($haystack, $needle, $offset); }
}
if (!function_exists('grapheme_strripos')) {
    function grapheme_strripos($haystack, $needle, $offset = 0) { return p\Grapheme::grapheme_strripos($haystack, $needle, $offset); }
}
if (!function_exists('grapheme_strrpos')) {
    function grapheme_strrpos($haystack, $needle, $offset = 0) { return p\Grapheme::grapheme_strrpos($haystack, $needle, $offset); }
}
if (!function_exists('grapheme_strstr')) {
    function grapheme_strstr($haystack, $needle, $beforeNeedle = false) { return p\Grapheme::grapheme_strstr($haystack, $needle, $beforeNeedle); }
}
if (!function_exists('grapheme_substr')) {
    function grapheme_substr($string, $offset, $length = null) { return p\Grapheme::grapheme_substr($string, $offset, $length); }
}

if (!function_exists('grapheme_strlen')) {
    function grapheme_strlen(?string $string): int|false|null { return p\Grapheme::grapheme_strlen((string) $string); }
}
if (!function_exists('grapheme_strpos')) {
    function grapheme_strpos(?string $haystack, ?string $needle, ?int $offset = 0): int|false { return p\Grapheme::grapheme_strpos((string) $haystack, (string) $needle, (int) $offset); }
}
if (!function_exists('grapheme_strripos')) {
    function grapheme_strripos(?string $haystack, ?string $needle, ?int $offset = 0): int|false { return p\Grapheme::grapheme_strripos((string) $haystack, (string) $needle, (int) $offset); }
}
if (!function_exists('grapheme_strrpos')) {
    function grapheme_strrpos(?string $haystack, ?string $needle, ?int $offset = 0): int|false { return p\Grapheme::grapheme_strrpos((string) $haystack, (string) $needle, (int) $offset); }
}
if (!function_exists('grapheme_strstr')) {
    function grapheme_strstr(?string $haystack, ?string $needle, ?bool $beforeNeedle = false): string|false { return p\Grapheme::grapheme_strstr((string) $haystack, (string) $needle, (bool) $beforeNeedle); }
}
if (!function_exists('grapheme_substr')) {
    function grapheme_substr(?string $string, ?int $offset, ?int $length = null): string|false { return p\Grapheme::grapheme_substr((string) $string, (int) $offset, $length); }
}