Description
string 
phpversion ( [string extension] )
     Returns a string containing the version of the currently running
     PHP parser. If the optional extension parameter is
     specified, phpversion() returns the version of that
     extension, or FALSE if there is no version information associated or
     the extension isn't enabled.
    
Note: 
      This information is also available in the predefined constant
      PHP_VERSION.
     
     
| Example 1. phpversion() example | 
<?php// prints e.g. 'Current PHP version: 4.1.1'
 echo 'Current PHP version: ' . phpversion();
 
 // prints e.g. '2.0' or nothing if the extension isn't enabled
 echo phpversion('tidy');
 ?>
 | 
 | 
    
     See also 
     version_compare(),
     phpinfo(), 
     phpcredits(),
     php_logo_guid(), and
     zend_version().