Finds position of first occurrence of a needle within a haystack (PHP 5)
int iconv_strpos ( string haystack, string needle [, int offset [, string charset]] )

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

The optional offset parameter specifies the position from which the search should be performed.

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


本函数可能返回布尔值 FALSE,但也可能返回一个与 FALSE 等值的非布尔值,例如 0 或者 ""。请参阅布尔类型章节以获取更多信息。应使用 === 运算符来测试本函数的返回值。

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

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.

If charset parameter is omitted, string are assumed to be encoded in iconv.internal_charset.

See also strpos(), iconv_strrpos() and mb_strpos().