(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0)
Find position (in grapheme units) of first occurrence of a case-insensitive string
int grapheme_stripos ( string $haystack, string $needle [, int $offset = 0 ] )
Procedural style
Find position (in grapheme units) of first occurrence of a case-insensitive string
Parameters:
haystack
The string to look in. Must be valid UTF