This can be used to read the contents of an external Phar archive. This
is most useful for assigning an alias to a phar so that subsequent references
to the phar can use the shorter alias, or for loading Phar archives that
only contain data and are not intended for execution/inclusion in PHP scripts.
Parameters
filename
the full or relative path to the phar archive to open
alias
The alias that may be used to refer to the phar archive. Note
that many phar archives specify an explicit alias inside the
phar archive, and a PharException will be thrown if
a new alias is specified in this case.
Return Values
Returns TRUE on success or FALSE on failure.
Errors/Exceptions
PharException is thrown if an alias is passed in and the phar archive
already has an explicit alias
Examples
Example #1 A Phar::loadPhar() example
Phar::loadPhar can be used anywhere to load an external Phar archive, whereas
Phar::mapPhar should be used in a loader stub for a Phar.