PHP Manual
iconv Funktionen
Finds position of first occurrence of a needle within a haystack

iconv_strpos

(PHP 5, PHP 7, PHP 8)

iconv_strpos — Finds position of first occurrence of a needle within a haystack

Beschreibung

iconv_strpos(
    string $haystack,
    string $needle,
    int $offset = 0,
    ?string $encoding = null
): int|false

Finds position of first occurrence of a needle within a haystack.

In contrast to strpos(), the return value of iconv_strpos() is the number of characters that appear before the needle, rather than the offset in bytes to the position where the needle has been found. The characters are counted on the basis of the specified character set encoding.

Parameter-Liste

haystack: The entire string.
needle: The searched substring.
offset: The optional offset parameter specifies the position from which the search should be performed. If the offset is negative, it is counted from the end of the string.
encoding: If encoding parameter is omitted or null, string are assumed to be encoded in iconv.internal_encoding.

If haystack or needle is not a string, it is converted to a string and applied as the ordinal value of a character.

Rückgabewerte

Returns the numeric position of the first occurrence of needle in haystack.

If needle is not found, iconv_strpos() will return false.

Warnung

Diese Funktion kann sowohl das boolsche false zurückliefern, als auch einen nicht-boolschen Wert, welcher zu false ausgewertet wird. Weitere Informationen entnehmen Sie bitte dem Abschnitt über die boolschen Typen. Benutzen Sie deshalb den === Operator, um den Rückgabewert dieser Funktion zu überprüfen.

Changelog

Version	Beschreibung
8.0.0	`encoding` is nullable now.
7.1.0	Support for negative `offset`s has been added.

Siehe auch

strpos() - Sucht die Position des ersten Vorkommens des Suchstrings in einem String
iconv_strrpos() - Finds the last occurrence of a needle within a haystack
mb_strpos() - Find position of first occurrence of string in a string