grapheme_strpos - PHP code example

PHP Function Grapheme Strpos()

The php function grapheme_strpos() finds the first occurrence of a case-insensitive string in another string. The function works similar to strpos() and stripos(), but it is based on grapheme units instead of bytes and characters.

string = original_str haystack = string

needle = string to search for in haystack
start = index of haystack that is the beginning of the first occurrence of needle
if (start >= len(haystack)-1): return part of haystack that contains needle
if (start + 1): return part of haystack before the first occurrence of needle
if haystack[start+ 1] in needle: return part of haystack + needle
if haystack[start+] not in needle: return part of haystack - needle
if haystack == needle: return False
if start!= len(haystack)-1: return False
This article will help you understand the php function grapheme_strpos() in detail. Also, you will learn how to use it along with other native functions like strchr() and stscroll() in your code.

grapheme_strpos example

return parent::indexOf($needle, $offset);
        }

        $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC;
        normalizer_is_normalized($needle, $form) ?: $needle = normalizer_normalize($needle, $form);

        if ('' === $needle || false === $needle) {
            return null;
        }

        try {
            $i = $this->ignoreCase ? grapheme_stripos($this->string, $needle, $offset) : grapheme_strpos($this->string, $needle, $offset);
        } catch (\ValueError) {
            return null;
        }

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

    public function indexOfLast(string|iterable|AbstractString $needle, int $offset = 0): ?int
    {
        if ($needle instanceof AbstractString) {
            $needle = $needle->string;
        }

if (!function_exists('grapheme_stripos')) {
    function grapheme_stripos(?string $haystack, ?string $needle, ?int $offset = 0): int|false { return p\Grapheme::grapheme_stripos((string) $haystack, (string) $needle, (int) $offset); }
}
if (!function_exists('grapheme_stristr')) {
    function grapheme_stristr(?string $haystack, ?string $needle, ?bool $beforeNeedle = false): string|false { return p\Grapheme::grapheme_stristr((string) $haystack, (string) $needle, (bool) $beforeNeedle); }
}
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')) {

if (!function_exists('grapheme_stripos')) {
    function grapheme_stripos($haystack, $needle, $offset = 0) { return p\Grapheme::grapheme_stripos($haystack, $needle, $offset); }
}
if (!function_exists('grapheme_stristr')) {
    function grapheme_stristr($haystack, $needle, $beforeNeedle = false) { return p\Grapheme::grapheme_stristr($haystack, $needle, $beforeNeedle); }
}
if (!function_exists('grapheme_strlen')) {
    function grapheme_strlen($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')) {