The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable | Changelog | 
|---|---|---|---|
| soap.wsdl_cache_enabled | 1 | PHP_INI_ALL | |
| soap.wsdl_cache_dir | /tmp | PHP_INI_ALL | |
| soap.wsdl_cache_ttl | 86400 | PHP_INI_ALL | |
| soap.wsdl_cache | 1 | PHP_INI_ALL | |
| soap.wsdl_cache_limit | 5 | PHP_INI_ALL | 
Here's a short explanation of the configuration directives.
soap.wsdl_cache_enabled
      integer
     Enables or disables the WSDL caching feature.
soap.wsdl_cache_dir
      string
     Sets the directory name where the SOAP extension will put cache files.
soap.wsdl_cache_ttl
      integer
     Sets the number of seconds (time to live) that cached files will be used instead of the originals.
soap.wsdl_cache
      integer
     
       If soap.wsdl_cache_enabled is on, this setting
       determines the type of caching. It can be any of:
       WSDL_CACHE_NONE (0),
       WSDL_CACHE_DISK (1),
       WSDL_CACHE_MEMORY (2) or
       WSDL_CACHE_BOTH (3). This can
       also be set via the options array in the
       SoapClient or SoapServer
       constructor.
      
soap.wsdl_cache_limit
      integer
     Maximum number of in-memory cached WSDL files. Adding further files into a full memory cache will delete the oldest files from it.