xref: /PHP-7.2/ext/intl/doc/grapheme_api.php (revision 60a69dae)
1<?php
2#############################################################################
3# Grapheme constants.
4#############################################################################
5
6	/**
7	 * grapheme_extract extract_type
8	 *
9	*/
10	/** Extract the given number of whole grapheme clusters from the string: */
11	define('GRAPHEME_EXTR_COUNT', 0);
12	/** Extract as many whole grapheme clusters as will fit into the given number of bytes: */
13	define('GRAPHEME_EXTR_MAXBYTES', 1);
14	/** Extract whole grapheme clusters up to a maximum number of UTF-8 characters: */
15	define('GRAPHEME_EXTR_MAXCHARS', 2);
16
17
18#############################################################################
19# Grapheme API
20#############################################################################
21
22	/**
23	 * Get string length in grapheme units
24	 * @param  string	$input		The string being measured for length.
25	 * @return int		The length of the string on success, and 0 if the string is empty.
26	*/
27	function grapheme_strlen($input) {}
28
29	/**
30	 * Find position (in grapheme units) of first occurrence of a string
31	 * @param string	$haystack	The string to look in
32	 * @param string	$needle		The string to look for
33	 * @param [int]		$offset		The optional offset parameter allows you to specify
34						which character in haystack  to start searching. The position
35						returned is still relative to the beginning of haystack.
36	 * @return int		Returns the position as an integer. If needle is not found, strpos() will return boolean FALSE.
37	*/
38	function grapheme_strpos($haystack, $needle, $offset = 0) {}
39
40
41	/**
42         * Find position (in grapheme units) of first occurrence of a case-insensitive string
43         * @param string        $haystack       The string to look in
44         * @param string        $needle         The string to look for
45         * @param [int]         $offset         The optional offset parameter allows you to specify
46                                                which character in haystack  to start searching. The position
47                                                returned is still relative to the beginning of haystack.
48         * @return int          Returns the position as an integer. If needle is not found, grapheme_stripos() will return boolean FALSE.
49        */
50        function grapheme_stripos($haystack, $needle, $offset = 0) {}
51
52
53	/**
54         * Find position (in grapheme units) of last occurrence of a string
55         * @param string        $haystack       The string to look in
56         * @param string        $needle         The string to look for
57         * @param [int]         $offset         The optional offset parameter allows you to specify
58                                                which character in haystack  to start searching. The position
59                                                returned is still relative to the beginning of haystack.
60         * @return int          Returns the position as an integer. If needle is not found, grapheme_strrpos() will return boolean FALSE.
61        */
62        function grapheme_strrpos($haystack, $needle, $offset = 0) {}
63
64
65	/**
66         * Find position (in grapheme units) of last occurrence of a case-insensitive string
67         * @param string        $haystack       The string to look in
68         * @param string        $needle         The string to look for
69         * @param [int]         $offset         The optional offset parameter allows you to specify
70                                                which character in haystack  to start searching. The position
71                                                returned is still relative to the beginning of haystack.
72         * @return int          Returns the position as an integer. If needle is not found, grapheme_strripos() will return boolean FALSE.
73        */
74        function grapheme_strripos($haystack, $needle, $offset = 0) {}
75
76
77	/**
78	 * Return part of a string
79	 * @param string	$string		The input string.
80	 * @param int		$start		If start  is non-negative, the returned string will start at the
81						start'th position in string, counting from zero. If start is negative,
82						the returned string will start at the start'th character from the
83						end of string.
84	 * @param [int]		$length		If length  is given and is positive, the string returned will contain
85						at most length characters beginning from start (depending on the
86						length of string). If string is less than or equal to start characters
87						long, FALSE  will be returned. If length is given and is negative, then
88						that many characters will be omitted from the end of string (after the
89						start position has been calculated when a start is negative). If start
90						denotes a position beyond this truncation, an empty string will be returned.
91	 * @return int		Returns the extracted part of string.
92	*/
93	function grapheme_substr($string, $start, $length = -1) {}
94
95
96	/**
97	 * Returns part of haystack string from the first occurrence of needle to the end of haystack.
98	 * @param string	$haystack	The input string.
99	 * @param string	$needle		The string to look for.
100	 * @param [boolean]	$before_needle	If TRUE (the default is FALSE), grapheme_strstr() returns the part of the
101						haystack before the first occurrence of the needle.
102	 * @return string	Returns the portion of string, or FALSE if needle is not found.
103	*/
104	function grapheme_strstr($haystack, $needle, $before_needle = FALSE) {}
105
106
107	/**
108	 * Returns part of haystack string from the first occurrence of case-insensitive needle to the end of haystack.
109         * @param string        $haystack       The input string.
110         * @param string        $needle         The string to look for.
111         * @param [boolean]     $before_needle  If TRUE (the default is FALSE), grapheme_strstr() returns the part of the
112                                                haystack before the first occurrence of the needle.
113         * @return string       Returns the portion of string, or FALSE if needle is not found.
114        */
115        function grapheme_stristr($haystack, $needle, $before_needle = FALSE) {}
116
117
118	/**
119	 * Function to extract a sequence of default grapheme clusters from a text buffer, which must be encoded in UTF-8.
120	 * @param string 	$haystack	string to search
121	 * @param int		$size		maximum number of units - based on the $extract_type - to return
122	 * @param [int]		$extract_type	one of GRAPHEME_EXTR_COUNT (default), GRAPHEME_EXTR_MAXBYTES, or GRAPHEME_EXTR_MAXCHARS
123	 * @param [int]		$start		starting position in $haystack in bytes
124	 * @param [&int]	$next		set to next starting position in bytes
125	 * @return string	A string starting at offset $start containing no more than $size grapheme clusters
126				and ending on a default grapheme cluster boundary.
127	*/
128	function grapheme_extract($haystack, $size, $extract_type = GRAPHEME_EXTR_COUNT, $start = 0, &$next) {}
129
130?>
131