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<?php
/**
* ActivityPub implementation for WordPress/PHP functions either missing from older WordPress/PHP versions or not included by default.
*
* @package Activitypub
*/
if ( ! function_exists( 'str_starts_with' ) ) {
/**
* Polyfill for `str_starts_with()` function added in PHP 8.0.
*
* Performs a case-sensitive check indicating if
* the haystack begins with needle.
*
* @param string $haystack The string to search in.
* @param string $needle The substring to search for in the `$haystack`.
* @return bool True if `$haystack` starts with `$needle`, otherwise false.
*/
function str_starts_with( $haystack, $needle ) {
if ( '' === $needle ) {
return true;
}
return 0 === strpos( $haystack, $needle );
}
}
if ( ! function_exists( 'str_ends_with' ) ) {
/**
* Polyfill for `str_ends_with()` function added in PHP 8.0.
*
* Performs a case-sensitive check indicating if
* the haystack ends with needle.
*
* @param string $haystack The string to search in.
* @param string $needle The substring to search for in the `$haystack`.
*
* @return bool True if `$haystack` ends with `$needle`, otherwise false.
*/
function str_ends_with( $haystack, $needle ) {
return strlen( $needle ) === 0 || substr( $haystack, - strlen( $needle ) ) === $needle;
}
}
/**
* Polyfill for `array_is_list()` function added in PHP 8.1.
*
* @param array $array The array to check.
*
* @return bool True if `$array` is a list, otherwise false.
*/
if ( ! function_exists( 'array_is_list' ) ) {
/**
* Check if an array is a list.
*
* An array is considered a list if its keys are a range of numbers
* starting from 0 and ending at count( $array ) - 1.
*
* @param array $input The array to check.
*
* @return bool True if `$input` is a list, otherwise false.
*/
function array_is_list( $input ) {
if ( ! is_array( $input ) ) {
return false;
}
if ( array_values( $input ) === $input ) {
return true;
}
$next_key = -1;
foreach ( $input as $k => $v ) {
if ( ++$next_key !== $k ) {
return false;
}
}
return true;
}
}
if ( ! function_exists( 'str_contains' ) ) {
/**
* Polyfill for `str_contains()` function added in PHP 8.0.
*
* Performs a case-sensitive check indicating if needle is
* contained in haystack.
*
* @param string $haystack The string to search in.
* @param string $needle The substring to search for in the `$haystack`.
*
* @return bool True if `$needle` is in `$haystack`, otherwise false.
*/
function str_contains( $haystack, $needle ) {
if ( '' === $needle ) {
return true;
}
return false !== strpos( $haystack, $needle );
}
}