grapheme_strpos

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0)

Find position (in grapheme units) of first occurrence of a string

int grapheme_strpos ( string $haystack, string $needle [, int $offset = 0 ] )

Procedural style

Find position (in grapheme units) of first occurrence of a 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, strpos() will return boolean FALSE.

Examples:

grapheme_strpos() 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"

print grapheme_strpos( $char_a_ring_nfd . $char_a_ring_nfd . $char_o_diaeresis_nfd, $char_o_diaeresis_nfd);

?>