# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

SOAP constants
Constant | Value | Description
--- | --- | ---
`SOAP_1_1` (int) | 1 | Specifies use of SOAP 1.1 when passed as `soap_version` option to SoapServer::__construct() or SoapClient::__construct().
`SOAP_1_2` (int) | 2 | Specifies use of SOAP 1.2 when passed as `soap_version` option to SoapServer::__construct() or SoapClient::__construct().
`SOAP_PERSISTENCE_SESSION` (int) | 1 |
`SOAP_PERSISTENCE_REQUEST` (int) | 2 |
`SOAP_FUNCTIONS_ALL` (int) | 999 |
`SOAP_ENCODED` (int) | 1 | Specifies use of SOAP Encoding when passed as `use` option to SoapClient::__construct().
`SOAP_LITERAL` (int) | 2 | Specifies use of service-specific encoding when passed as `use` option to SoapClient::__construct().
`SOAP_RPC` (int) | 1 | Specifies use of RPC-style binding when passed as `style` option to SoapClient::__construct().
`SOAP_DOCUMENT` (int) | 2 | Specifies use of document binding when passed as `style` option to SoapClient::__construct().
`SOAP_ACTOR_NEXT` (int) | 1 |
`SOAP_ACTOR_NONE` (int) | 2 |
`SOAP_ACTOR_UNLIMATERECEIVER` (int) | 3 |
`SOAP_COMPRESSION_ACCEPT` (int) | 32 | Specifies use of an "Accept-Encoding" header when passed as part of the `compression` option to SoapClient::__construct().
`SOAP_COMPRESSION_GZIP` (int) | 0 | Specifies use of gzip compression when passed as part of the `compression` option to SoapClient::__construct().
`SOAP_COMPRESSION_DEFLATE` (int) | 16 | Specifies use of deflate compression when passed as part of the `compression` option to SoapClient::__construct().
`SOAP_AUTHENTICATION_BASIC` (int) | 0 | Specifies use of HTTP Basic Authentication when passed as `authentication` option to SoapClient::__construct().
`SOAP_AUTHENTICATION_DIGEST` (int) | 1 | Specifies use of HTTP Digest Authentication when passed as `authentication` option to SoapClient::__construct().
`SOAP_SSL_METHOD_TLS` (int) | 0 | Used with the deprecated `ssl_method` option to SoapClient::__construct().
`SOAP_SSL_METHOD_SSLv2` (int) | 1 | Used with the deprecated `ssl_method` option to SoapClient::__construct().
`SOAP_SSL_METHOD_SSLv3` (int) | 2 | Used with the deprecated `ssl_method` option to SoapClient::__construct().
`SOAP_SSL_METHOD_SSLv23` (int) | 3 | Used with the deprecated `ssl_method` option to SoapClient::__construct().
`UNKNOWN_TYPE` (int) | 999998 |
`XSD_STRING` (int) | 101 |
`XSD_BOOLEAN` (int) | 102 |
`XSD_DECIMAL` (int) | 103 |
`XSD_FLOAT` (int) | 104 |
`XSD_DOUBLE` (int) | 105 |
`XSD_DURATION` (int) | 106 |
`XSD_DATETIME` (int) | 107 |
`XSD_TIME` (int) | 108 |
`XSD_DATE` (int) | 109 |
`XSD_GYEARMONTH` (int) | 110 |
`XSD_GYEAR` (int) | 111 |
`XSD_GMONTHDAY` (int) | 112 |
`XSD_GDAY` (int) | 113 |
`XSD_GMONTH` (int) | 114 |
`XSD_HEXBINARY` (int) | 115 |
`XSD_BASE64BINARY` (int) | 116 |
`XSD_ANYURI` (int) | 117 |
`XSD_QNAME` (int) | 118 |
`XSD_NOTATION` (int) | 119 |
`XSD_NORMALIZEDSTRING` (int) | 120 |
`XSD_TOKEN` (int) | 121 |
`XSD_LANGUAGE` (int) | 122 |
`XSD_NMTOKEN` (int) | 123 |
`XSD_NAME` (int) | 124 |
`XSD_NCNAME` (int) | 125 |
`XSD_ID` (int) | 126 |
`XSD_IDREF` (int) | 127 |
`XSD_IDREFS` (int) | 128 |
`XSD_ENTITY` (int) | 129 |
`XSD_ENTITIES` (int) | 130 |
`XSD_INTEGER` (int) | 131 |
`XSD_NONPOSITIVEINTEGER` (int) | 132 |
`XSD_NEGATIVEINTEGER` (int) | 133 |
`XSD_LONG` (int) | 134 |
`XSD_INT` (int) | 135 |
`XSD_SHORT` (int) | 136 |
`XSD_BYTE` (int) | 137 |
`XSD_NONNEGATIVEINTEGER` (int) | 138 |
`XSD_UNSIGNEDLONG` (int) | 139 |
`XSD_UNSIGNEDINT` (int) | 140 |
`XSD_UNSIGNEDSHORT` (int) | 141 |
`XSD_UNSIGNEDBYTE` (int) | 142 |
`XSD_POSITIVEINTEGER` (int) | 143 |
`XSD_NMTOKENS` (int) | 144 |
`XSD_ANYTYPE` (int) | 145 |
`XSD_ANYXML` (int) | 147 |
`APACHE_MAP` (int) | 200 |
`SOAP_ENC_OBJECT` (int) | 301 |
`SOAP_ENC_ARRAY` (int) | 300 |
`XSD_1999_TIMEINSTANT` (int) | 401 |
`XSD_NAMESPACE` (string) | http://www.w3.org/2001/XMLSchema |
`XSD_1999_NAMESPACE` (string) | http://www.w3.org/1999/XMLSchema |
`SOAP_SINGLE_ELEMENT_ARRAYS` (int) | 1 | Used with the `features` option to SoapClient::__construct().
`SOAP_WAIT_ONE_WAY_CALLS` (int) | 2 | Used with the `features` option to SoapClient::__construct().
`SOAP_USE_XSI_ARRAY_TYPE` (int) | 4 | Used with the `features` option to SoapClient::__construct().
`WSDL_CACHE_NONE` (int) | 0 | Disables the WSDL cache when used in the soap.wsdl_cache configuration option or the `wsdl_cache` option to SoapClient::__construct() and SoapServer::__construct().
`WSDL_CACHE_DISK` (int) | 1 | Specifies use of the on-disk WSDL cache only when used in the soap.wsdl_cache configuration option or the `wsdl_cache` option to SoapClient::__construct() and SoapServer::__construct().
`WSDL_CACHE_MEMORY` (int) | 2 | Specifies use of the in-memory WSDL cache only when used in the soap.wsdl_cache configuration option or the `wsdl_cache` option to SoapClient::__construct() and SoapServer::__construct().
`WSDL_CACHE_BOTH` (int) | 3 | Specifies use of both on-disk and in-memory WSDL caches when used in the soap.wsdl_cache configuration option or the `wsdl_cache` option to SoapClient::__construct() and SoapServer::__construct().

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