php 한글 메뉴얼 도움말 검색 사이트 Finds position of first occurrence of a needle within a haystack [function.iconv-strpos]

설명

int iconv_strpos ( string $haystack , string $needle [, int $offset = 0 [, string $charset = ini_get("iconv.internal_encoding") ]] )

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 charset.

인수

haystack: The entire string.
needle: The searched substring.
offset: The optional offset parameter specifies the position from which the search should be performed.
charset: If charset parameter is omitted, 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.

반환값

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

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

Warning

이 함수는 논리 FALSE를 반환하지만, 논리 FALSE로 취급할 수 있는 다른 값을 반환할 수 있습니다. 자세한 정보는 논리형 섹션을 참고하십시오. 이 함수의 반환값을 확인하려면 === 연산자를 이용하십시오.

참고

strpos() - 문자열이 처음 나타나는 위치를 찾습니다
iconv_strrpos() - Finds the last occurrence of a needle within a haystack
mb_strpos() - Find position of first occurrence of string in a string