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<?php
// Manually include the versions file as we can't always rely on `get_bloginfo()` to fetch versions.
include ABSPATH . WPINC . '/version.php';
if ( ! function_exists( 'wp_check_php_version' ) && version_compare( '5.1', $wp_version, '>' ) ) {
/**
* Fallback function replicating core behavior from WordPress 5.1.0 to check PHP versions.
*
* @return array|bool|mixed|object|WP_Error
*/
function wp_check_php_version() {
$version = phpversion();
$key = md5( $version );
$response = get_site_transient( 'php_check_' . $key );
if ( false === $response ) {
$url = 'http://api.wordpress.org/core/serve-happy/1.0/';
if ( wp_http_supports( array( 'ssl' ) ) ) {
$url = set_url_scheme( $url, 'https' );
}
$url = add_query_arg( 'php_version', $version, $url );
$response = wp_remote_get( $url );
if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {
return false;
}
/**
* Response should be an array with:
* 'recommended_version' - string - The PHP version recommended by WordPress.
* 'is_supported' - boolean - Whether the PHP version is actively supported.
* 'is_secure' - boolean - Whether the PHP version receives security updates.
* 'is_acceptable' - boolean - Whether the PHP version is still acceptable for WordPress.
*/
$response = json_decode( wp_remote_retrieve_body( $response ), true );
if ( ! is_array( $response ) ) {
return false;
}
set_site_transient( 'php_check_' . $key, $response, WEEK_IN_SECONDS );
}
if ( isset( $response['is_acceptable'] ) && $response['is_acceptable'] ) {
/**
* Filters whether the active PHP version is considered acceptable by WordPress.
*
* Returning false will trigger a PHP version warning to show up in the admin dashboard to administrators.
*
* This filter is only run if the wordpress.org Serve Happy API considers the PHP version acceptable, ensuring
* that this filter can only make this check stricter, but not loosen it.
*
* @since 5.1.1
*
* @param bool $is_acceptable Whether the PHP version is considered acceptable. Default true.
* @param string $version PHP version checked.
*/
$response['is_acceptable'] = (bool) apply_filters( 'wp_is_php_version_acceptable', true, $version );
}
return $response;
}
}
if ( ! function_exists( 'wp_get_update_php_url' ) && version_compare( '5.1', $wp_version, '>' ) ) {
/**
* Fallback function replicating core behavior from WordPress 5.1.0 to check PHP versions.
*
* @return string URL to learn more about updating PHP.
*/
function wp_get_update_php_url() {
$default_url = _x( 'https://wordpress.org/support/update-php/', 'localized PHP upgrade information page', 'health-check' );
$update_url = $default_url;
if ( false !== getenv( 'WP_UPDATE_PHP_URL' ) ) {
$update_url = getenv( 'WP_UPDATE_PHP_URL' );
}
/**
* Filters the URL to learn more about updating the PHP version the site is running on.
*
* Providing an empty string is not allowed and will result in the default URL being used. Furthermore
* the page the URL links to should preferably be localized in the site language.
*
* @since 5.1.0
*
* @param string $update_url URL to learn more about updating PHP.
*/
$update_url = apply_filters( 'wp_update_php_url', $update_url );
if ( empty( $update_url ) ) {
$update_url = $default_url;
}
return $update_url;
}
}
if ( ! function_exists( 'is_countable' ) && version_compare( '4.9.6', $wp_version, '>' ) ) {
/**
* Fallback function replicating core behavior from WordPress 4.9.6 to check PHP versions.
*
* Polyfill for is_countable() function added in PHP 7.3.
*
* Verify that the content of a variable is an array or an object
* implementing the Countable interface.
*
* @param mixed $var The value to check.
*
* @return bool True if `$var` is countable, false otherwise.
*/
function is_countable( $var ) {
return ( is_array( $var )
|| $var instanceof Countable
|| $var instanceof SimpleXMLElement
|| $var instanceof ResourceBundle
);
}
}
if ( ! function_exists( 'get_user_count' ) && version_compare( '4.8', $wp_version, '>' ) ) {
/**
* Fallback function replicating core behavior from WordPress 4.8.0 to check PHP versions.
*
* @return int Number of active users on the network.
*/
function get_user_count( $network_id = null ) {
return get_network_option( $network_id, 'user_count' );
}
}
if ( ! function_exists( 'get_user_locale' ) && version_compare( '4.7', $wp_version, '>' ) ) {
/**
* Fallback function replicating core behavior from WordPress 4.7.0 to check PHP versions.
*
* @return string The locale of the user.
*/
function get_user_locale( $user_id = 0 ) {
$user = false;
if ( 0 === $user_id && function_exists( 'wp_get_current_user' ) ) {
$user = wp_get_current_user();
} elseif ( $user_id instanceof WP_User ) {
$user = $user_id;
} elseif ( $user_id && is_numeric( $user_id ) ) {
$user = get_user_by( 'id', $user_id );
}
if ( ! $user ) {
return get_locale();
}
$locale = $user->locale;
return $locale ? $locale : get_locale();
}
}
if ( ! function_exists( 'wp_get_upload_dir' ) && version_compare( '4.5', $wp_version, '>' ) ) {
/**
* Fallback function replicating core behavior from WordPress 4.5.0 to check PHP versions.
*
* @return array See `wp_upload_dir()` for description.
*/
function wp_get_upload_dir() {
return wp_upload_dir( null, false );
}
}
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