(PHP 5, PHP 7, PHP 8)
ReflectionExtension::getConstants — 获取常量
此函数没有参数。
返回一个以常量名称为索引的数组。
示例 #1 ReflectionExtension::getConstants() example
<?php
$ext = new ReflectionExtension('DOM');
print_r($ext->getConstants());
?>以上示例的输出类似于：
Array
(
[XML_ELEMENT_NODE] => 1
[XML_ATTRIBUTE_NODE] => 2
[XML_TEXT_NODE] => 3
[XML_CDATA_SECTION_NODE] => 4
[XML_ENTITY_REF_NODE] => 5
[XML_ENTITY_NODE] => 6
[XML_PI_NODE] => 7
[XML_COMMENT_NODE] => 8
[XML_DOCUMENT_NODE] => 9
[XML_DOCUMENT_TYPE_NODE] => 10
[XML_DOCUMENT_FRAG_NODE] => 11
[XML_NOTATION_NODE] => 12
[XML_HTML_DOCUMENT_NODE] => 13
[XML_DTD_NODE] => 14
[XML_ELEMENT_DECL_NODE] => 15
[XML_ATTRIBUTE_DECL_NODE] => 16
[XML_ENTITY_DECL_NODE] => 17
[XML_NAMESPACE_DECL_NODE] => 18
[XML_LOCAL_NAMESPACE] => 18
[XML_ATTRIBUTE_CDATA] => 1
[XML_ATTRIBUTE_ID] => 2
[XML_ATTRIBUTE_IDREF] => 3
[XML_ATTRIBUTE_IDREFS] => 4
[XML_ATTRIBUTE_ENTITY] => 6
[XML_ATTRIBUTE_NMTOKEN] => 7
[XML_ATTRIBUTE_NMTOKENS] => 8
[XML_ATTRIBUTE_ENUMERATION] => 9
[XML_ATTRIBUTE_NOTATION] => 10
[DOM_PHP_ERR] => 0
[DOM_INDEX_SIZE_ERR] => 1
[DOMSTRING_SIZE_ERR] => 2
[DOM_HIERARCHY_REQUEST_ERR] => 3
[DOM_WRONG_DOCUMENT_ERR] => 4
[DOM_INVALID_CHARACTER_ERR] => 5
[DOM_NO_DATA_ALLOWED_ERR] => 6
[DOM_NO_MODIFICATION_ALLOWED_ERR] => 7
[DOM_NOT_FOUND_ERR] => 8
[DOM_NOT_SUPPORTED_ERR] => 9
[DOM_INUSE_ATTRIBUTE_ERR] => 10
[DOM_INVALID_STATE_ERR] => 11
[DOM_SYNTAX_ERR] => 12
[DOM_INVALID_MODIFICATION_ERR] => 13
[DOM_NAMESPACE_ERR] => 14
[DOM_INVALID_ACCESS_ERR] => 15
[DOM_VALIDATION_ERR] => 16
)