grapheme_strstr - PHP code example

php Function Grapheme_Strstr

php function grapheme_strstr is one of the most important native functions in PHP. It searches for a specific character in a string, and returns the location of it. It is often used to validate strings, for example when checking for valid email addresses. The function is similar to a number of other useful PHP functions, including strpos(), strrchr(), strreplace() and substr().

In general, a string is a set of letters, special characters and arithmetic values (or a mix of them), enclosed in single or double quotation marks. The string is usually used to communicate with other programs and devices, and it can also be a human-readable form of information.

The php function grapheme_strstr searches for a particular string in another, and returns the portion of the string from the last occurrence of the needle until the end of the string. This function is binary safe, and it also allows for case-insensitive searches with the strrstr() function.

haystack: the string in which the search is carried out. needle: the string that is searched for. ans: the portion of haystack that contains needle, or FALSE if no match is found.

The php function strstrstr is very useful for many situations, and it is easy to use. However, there are some things to keep in mind when using this function. For example, it should not be used to validate passwords. The function is not as accurate as other validation tools, such as md5 hashing, and there are some limitations to its use.

grapheme_strstr example

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); }
}

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); }
}