Returns a string containing the version of the currently running PHP
parser or extension.
Parameters
extension
An optional extension name.
Return Values
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.
Examples
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'); ?>
Notes
Note:
This information is also available in the predefined constant
PHP_VERSION.
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