(PHP 5 >= 5.3.0, PHP 7, PECL phar >= 2.0.0)
PharData::isWritable — Returns true if the tar/zip archive can be modified
public PharData::isWritable ( ) : bool
This method returns true if the tar/zip archive on disk is not read-only. Unlike Phar::isWritable(), data-only tar/zip archives can be modified even if phar.readonly is set to 1.
No parameters.
Returns true if the tar/zip archive can be modified
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https://www.php.net/manual/en/phardata.iswritable.php