iconv_strpos

Description

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.

警告

这个函数可能返回 Boolean FALSE，也可能返回一个与 FALSE 相等地非 Boolean 值，比如 0 或者 "" 。请参阅 Booleans 的有关章节以获取更多信息。请使用 === 操作符来测试该函数的返回值。

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.