Viewing file:  ReflectionConstant.php (4.91 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
if (\PHP_VERSION_ID < 80400) {
/**
* @author Daniel Scherzer <daniel.e.scherzer@gmail.com>
*/
final class ReflectionConstant
{
/**
* @var string
*
* @readonly
*/
public $name;
private $value;
private $deprecated;
private static $persistentConstants = [];
public function __construct(string $name)
{
if (!defined($name) || false !== strpos($name, '::')) {
throw new ReflectionException("Constant \"$name\" does not exist");
}
$this->name = ltrim($name, '\\');
$deprecated = false;
$eh = set_error_handler(static function ($type, $msg, $file, $line) use ($name, &$deprecated, &$eh) {
if (\E_DEPRECATED === $type && "Constant $name is deprecated" === $msg) {
return $deprecated = true;
}
return $eh && $eh($type, $msg, $file, $line);
});
try {
$this->value = constant($name);
$this->deprecated = $deprecated;
} finally {
restore_error_handler();
}
}
public function getName(): string
{
return $this->name;
}
public function getValue()
{
return $this->value;
}
public function getNamespaceName(): string
{
if (false === $slashPos = strrpos($this->name, '\\')) {
return '';
}
return substr($this->name, 0, $slashPos);
}
public function getShortName(): string
{
if (false === $slashPos = strrpos($this->name, '\\')) {
return $this->name;
}
return substr($this->name, $slashPos + 1);
}
public function isDeprecated(): bool
{
return $this->deprecated;
}
public function __toString(): string
{
// A constant is persistent if provided by PHP itself rather than
// being defined by users. If we got here, we know that it *is*
// defined, so we just need to figure out if it is defined by the
// user or not
if (!self::$persistentConstants) {
$persistentConstants = get_defined_constants(true);
unset($persistentConstants['user']);
foreach ($persistentConstants as $constants) {
self::$persistentConstants += $constants;
}
}
$persistent = array_key_exists($this->name, self::$persistentConstants);
// Can't match the inclusion of `no_file_cache` but the rest is
// possible to match
$result = 'Constant [ ';
if ($persistent || $this->deprecated) {
$result .= '<';
if ($persistent) {
$result .= 'persistent';
if ($this->deprecated) {
$result .= ', ';
}
}
if ($this->deprecated) {
$result .= 'deprecated';
}
$result .= '> ';
}
// Cannot just use gettype() to match zend_zval_type_name()
if (is_object($this->value)) {
$result .= \PHP_VERSION_ID >= 80000 ? get_debug_type($this->value) : gettype($this->value);
} elseif (is_bool($this->value)) {
$result .= 'bool';
} elseif (is_int($this->value)) {
$result .= 'int';
} elseif (is_float($this->value)) {
$result .= 'float';
} elseif (null === $this->value) {
$result .= 'null';
} else {
$result .= gettype($this->value);
}
$result .= ' ';
$result .= $this->name;
$result .= ' ] { ';
if (is_array($this->value)) {
$result .= 'Array';
} else {
// This will throw an exception if the value is an object that
// cannot be converted to string; that is expected and matches
// the behavior of zval_get_string_func()
$result .= (string) $this->value;
}
$result .= " }\n";
return $result;
}
public function __sleep(): array
{
throw new Exception("Serialization of 'ReflectionConstant' is not allowed");
}
public function __wakeup(): void
{
throw new Exception("Unserialization of 'ReflectionConstant' is not allowed");
}
}
}
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