grapheme_stripos

(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-8.

needle

The string to look for. Must be valid UTF-8.

offset

The optional $offset parameter allows you to specify where in haystack to start searching as an offset in grapheme units (not bytes or characters). The position returned is still relative to the beginning of haystack regardless of the value of $offset.

Returns:

Returns the position as an integer. If needle is not found, grapheme_stripos() will return boolean FALSE.

Examples:

grapheme_stripos() example

<?php

$char_a_ring_nfd = "a\xCC\x8A";  // 'LATIN SMALL LETTER A WITH RING ABOVE' (U+00E5) normalization form "D"
$char_o_diaeresis_nfd = "o\xCC\x88"; // 'LATIN SMALL LETTER O WITH DIAERESIS' (U+00F6) normalization form "D"
$char_O_diaeresis_nfd = "O\xCC\x88"; // 'LATIN CAPITAL LETTER O WITH DIAERESIS' (U+00D6) normalization form "D"

print grapheme_stripos( $char_a_ring_nfd . $char_a_ring_nfd . $char_o_diaeresis_nfd, $char_O_diaeresis_nfd);

?>