put`. False if `$algo`
* is unknown or invalid.
*/
function _hash_hmac($algo, $data, $key, $raw_output = false) {
$packs = array('md5' => 'H32', 'sha1' => 'H40');
if ( !isset($packs[$algo]) )
return false;
$pack = $packs[$algo];
if (strlen($key) > 64)
$key = pack($pack, $algo($key));
$key = str_pad($key, 64, chr(0));
$ipad = (substr($key, 0, 64) ^ str_repeat(chr(0x36), 64));
$opad = (substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64));
$hmac = $algo($opad . pack($pack, $algo($ipad . $data)));
if ( $raw_output )
return pack( $pack, $hmac );
return $hmac;
}
if ( !function_exists('json_encode') ) {
function json_encode( $string ) {
global $wp_json;
if ( ! ( $wp_json instanceof Services_JSON ) ) {
require_once( ABSPATH . WPINC . '/class-json.php' );
$wp_json = new Services_JSON();
}
return $wp_json->encodeUnsafe( $string );
}
}
if ( !function_exists('json_decode') ) {
/**
* @global Services_JSON $wp_json
* @param string $string
* @param bool $assoc_array
* @return object|array
*/
function json_decode( $string, $assoc_array = false ) {
global $wp_json;
if ( ! ($wp_json instanceof Services_JSON ) ) {
require_once( ABSPATH . WPINC . '/class-json.php' );
$wp_json = new Services_JSON();
}
$res = $wp_json->decode( $string );
if ( $assoc_array )
$res = _json_decode_object_helper( $res );
return $res;
}
/**
* @param object $data
* @return array
*/
function _json_decode_object_helper($data) {
if ( is_object($data) )
$data = get_object_vars($data);
return is_array($data) ? array_map(__FUNCTION__, $data) : $data;
}
}
if ( ! function_exists( 'hash_equals' ) ) :
/**
* Timing attack safe string comparison
*
* Compares two strings using the same time whether they're equal or not.
*
* This function was added in PHP 5.6.
*
* Note: It can leak the length of a string when arguments of differing length are supplied.
*
* @since 3.9.2
*
* @param string $a Expected string.
* @param string $b Actual, user supplied, string.
* @return bool Whether strings are equal.
*/
function hash_equals( $a, $b ) {
$a_length = strlen( $a );
if ( $a_length !== strlen( $b ) ) {
return false;
}
$result = 0;
// Do not attempt to "optimize" this.
for ( $i = 0; $i < $a_length; $i++ ) {
$result |= ord( $a[ $i ] ) ^ ord( $b[ $i ] );
}
return $result === 0;
}
endif;
// JSON_PRETTY_PRINT was introduced in PHP 5.4
// Defined here to prevent a notice when using it with wp_json_encode()
if ( ! defined( 'JSON_PRETTY_PRINT' ) ) {
define( 'JSON_PRETTY_PRINT', 128 );
}
if ( ! function_exists( 'json_last_error_msg' ) ) :
/**
* Retrieves the error string of the last json_encode() or json_decode() call.
*
* @since 4.4.0
*
* @internal This is a compatibility function for PHP <5.5
*
* @return bool|string Returns the error message on success, "No Error" if no error has occurred,
* or false on failure.
*/
function json_last_error_msg() {
// See https://core.trac.wordpress.org/ticket/27799.
if ( ! function_exists( 'json_last_error' ) ) {
return false;
}
$last_error_code = json_last_error();
// Just in case JSON_ERROR_NONE is not defined.
$error_code_none = defined( 'JSON_ERROR_NONE' ) ? JSON_ERROR_NONE : 0;
switch ( true ) {
case $last_error_code === $error_code_none:
return 'No error';
case defined( 'JSON_ERROR_DEPTH' ) && JSON_ERROR_DEPTH === $last_error_code:
return 'Maximum stack depth exceeded';
case defined( 'JSON_ERROR_STATE_MISMATCH' ) && JSON_ERROR_STATE_MISMATCH === $last_error_code:
return 'State mismatch (invalid or malformed JSON)';
case defined( 'JSON_ERROR_CTRL_CHAR' ) && JSON_ERROR_CTRL_CHAR === $last_error_code:
return 'Control character error, possibly incorrectly encoded';
case defined( 'JSON_ERROR_SYNTAX' ) && JSON_ERROR_SYNTAX === $last_error_code:
return 'Syntax error';
case defined( 'JSON_ERROR_UTF8' ) && JSON_ERROR_UTF8 === $last_error_code:
return 'Malformed UTF-8 characters, possibly incorrectly encoded';
case defined( 'JSON_ERROR_RECURSION' ) && JSON_ERROR_RECURSION === $last_error_code:
return 'Recursion detected';
case defined( 'JSON_ERROR_INF_OR_NAN' ) && JSON_ERROR_INF_OR_NAN === $last_error_code:
return 'Inf and NaN cannot be JSON encoded';
case defined( 'JSON_ERROR_UNSUPPORTED_TYPE' ) && JSON_ERROR_UNSUPPORTED_TYPE === $last_error_code:
return 'Type is not supported';
default:
return 'An unknown error occurred';
}
}
endif;
if ( ! interface_exists( 'JsonSerializable' ) ) {
define( 'WP_JSON_SERIALIZE_COMPATIBLE', true );
/**
* JsonSerializable interface.
*
* Compatibility shim for PHP <5.4
*
* @link https://secure.php.net/jsonserializable
*
* @since 4.4.0
*/
interface JsonSerializable {
public function jsonSerialize();
}
}
// random_int was introduced in PHP 7.0
if ( ! function_exists( 'random_int' ) ) {
require ABSPATH . WPINC . '/random_compat/random.php';
}
if ( ! function_exists( 'array_replace_recursive' ) ) :
/**
* PHP-agnostic version of {@link array_replace_recursive()}.
*
* The array_replace_recursive() function is a PHP 5.3 function. WordPress
* currently supports down to PHP 5.2, so this method is a workaround
* for PHP 5.2.
*
* Note: array_replace_recursive() supports infinite arguments, but for our use-
* case, we only need to support two arguments.
*
* Subject to removal once WordPress makes PHP 5.3.0 the minimum requirement.
*
* @since 4.5.3
*
* @see https://secure.php.net/manual/en/function.array-replace-recursive.php#109390
*
* @param array $base Array with keys needing to be replaced.
* @param array $replacements Array with the replaced keys.
*
* @return array
*/
function array_replace_recursive( $base = array(), $replacements = array() ) {
foreach ( array_slice( func_get_args(), 1 ) as $replacements ) {
$bref_stack = array( &$base );
$head_stack = array( $replacements );
do {
end( $bref_stack );
$bref = &$bref_stack[ key( $bref_stack ) ];
$head = array_pop( $head_stack );
unset( $bref_stack[ key( $bref_stack ) ] );
foreach ( array_keys( $head ) as $key ) {
if ( isset( $key, $bref ) &&
isset( $bref[ $key ] ) && is_array( $bref[ $key ] ) &&
isset( $head[ $key ] ) && is_array( $head[ $key ] )
) {
$bref_stack[] = &$bref[ $key ];
$head_stack[] = $head[ $key ];
} else {
$bref[ $key ] = $head[ $key ];
}
}
} while ( count( $head_stack ) );
}
return $base;
}
endif;
/**
* Polyfill for the SPL autoloader. In PHP 5.2 (but not 5.3 and later), SPL can
* be disabled, and PHP 7.2 raises notices if the compiler finds an __autoload()
* function declaration. Function availability is checked here, and the
* autoloader is included only if necessary.
*/
if ( ! function_exists( 'spl_autoload_register' ) ) {
require_once ABSPATH . WPINC . '/spl-autoload-compat.php';
}
if ( ! function_exists( 'is_countable' ) ) {
/**
* 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.
*
* @since 4.9.6
*
* @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( 'is_iterable' ) ) {
/**
* Polyfill for is_iterable() function added in PHP 7.1.
*
* Verify that the content of a variable is an array or an object
* implementing the Traversable interface.
*
* @since 4.9.6
*
* @param mixed $var The value to check.
*
* @return bool True if `$var` is iterable, false otherwise.
*/
function is_iterable( $var ) {
return ( is_array( $var ) || $var instanceof Traversable );
}
}
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