activitypub / includes / compat.php

compat.php in ActivityPub 2.3.0, at includes/compat.php

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1	<?php
2	/**
3	* ActivityPub implementation for WordPress/PHP functions either missing from older WordPress/PHP versions or not included by default.
4	*/
5
6	if ( ! function_exists( 'str_starts_with' ) ) {
7	/**
8	* Polyfill for `str_starts_with()` function added in PHP 8.0.
9	*
10	* Performs a case-sensitive check indicating if
11	* the haystack begins with needle.
12	*
13	* @param string $haystack The string to search in.
14	* @param string $needle The substring to search for in the `$haystack`.
15	* @return bool True if `$haystack` starts with `$needle`, otherwise false.
16	*/
17	function str_starts_with( $haystack, $needle ) {
18	if ( '' === $needle ) {
19	return true;
20	}
21
22	return 0 === strpos( $haystack, $needle );
23	}
24	}
25
26	if ( ! function_exists( 'get_self_link' ) ) {
27	/**
28	* Returns the link for the currently displayed feed.
29	*
30	* @return string Correct link for the atom:self element.
31	*/
32	function get_self_link() {
33	$host = wp_parse_url( home_url() );
34	$path = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '';
35	return esc_url( apply_filters( 'self_link', set_url_scheme( 'http://' . $host['host'] . $path ) ) );
36	}
37	}
38
39	if ( ! function_exists( 'is_countable' ) ) {
40	/**
41	* Polyfill for `is_countable()` function added in PHP 7.3.
42	*
43	* @param mixed $value The value to check.
44	* @return bool True if `$value` is countable, otherwise false.
45	*/
46	function is_countable( $value ) {
47	return is_array( $value ) \|\| $value instanceof \Countable;
48	}
49	}
50
51	/**
52	* Polyfill for `array_is_list()` function added in PHP 7.3.
53	*
54	* @param array $array The array to check.
55	*
56	* @return bool True if `$array` is a list, otherwise false.
57	*/
58	if ( ! function_exists( 'array_is_list' ) ) {
59	function array_is_list( $array ) {
60	if ( ! is_array( $array ) ) {
61	return false;
62	}
63
64	if ( array_values( $array ) === $array ) {
65	return true;
66	}
67
68	$next_key = -1;
69
70	foreach ( $array as $k => $v ) {
71	if ( ++$next_key !== $k ) {
72	return false;
73	}
74	}
75
76	return true;
77	}
78	}
79
80	if ( ! function_exists( 'str_contains' ) ) {
81	/**
82	* Polyfill for `str_contains()` function added in PHP 8.0.
83	*
84	* Performs a case-sensitive check indicating if needle is
85	* contained in haystack.
86	*
87	* @param string $haystack The string to search in.
88	* @param string $needle The substring to search for in the `$haystack`.
89	*
90	* @return bool True if `$needle` is in `$haystack`, otherwise false.
91	*/
92	function str_contains( $haystack, $needle ) {
93	if ( '' === $needle ) {
94	return true;
95	}
96
97	return false !== strpos( $haystack, $needle );
98	}
99	}
100